Thomas I. Lyles, Jr. v. David J. Shulkin ( 2017 )


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  •                UNITED STATES COURT OF APPEALS FOR VETERANS CLAIMS
    No. 16-0994
    THOMAS I. LYLES, JR., APPELLANT,
    V.
    DAVID J. SHULKIN, M.D.,
    SECRETARY OF VETERANS AFFAIRS, APPELLEE.
    On Appeal from the Board of Veterans' Appeals
    (Argued August 17, 2017                                                           Decided November 29, 2017)
    Christian A. McTarnaghan, of Providence, Rhode Island, for the appellant.
    Megan C. Kral, with whom Leigh A. Bradley, General Counsel; Mary Ann Flynn, Chief
    Counsel; and Edward V. Cassidy, Jr., Deputy Chief Counsel, all of Washington, D.C., were on the
    brief for the appellee.
    Before DAVIS, Chief Judge, and BARTLEY and GREENBERG, Judges.
    BARTLEY, Judge: Veteran Thomas I. Lyles, Jr., appeals through counsel a January 14,
    2016, Board of Veterans' Appeals (Board) decision denying entitlement to a separate disability
    evaluation for service-connected left knee disability based on locking or other manifestations of
    the semilunar cartilage.1 Record (R.) at 2-19.2 This matter was referred to a panel of the Court,
    with oral argument, to address the interplay between 38 C.F.R. § 4.71a, Diagnostic Codes (DCs)
    5257 (Other impairment of the knee: recurrent subluxation3 or lateral instability), 5258 (Dislocated
    semilunar cartilage with frequent episodes of "locking," pain, and effusion into the joint), 5259
    1
    Semilunar cartilage, in this context, refers to the knee menisci. DORLAND'S ILLUSTRATED MEDICAL
    DICTIONARY 299 (32d ed. 2012) [hereinafter DORLAND'S].
    2
    The Board also denied entitlement to increased left knee evaluations based on limitation of extension before
    and after April 22, 2010, and a separate evaluation based on limitation of flexion. R. at 13-17. Because Mr. Lyles
    has not challenged those portions of the Board decision, the appeal as to those issues will be dismissed. See Pederson
    v. McDonald, 
    27 Vet. App. 276
    , 281-85 (2015) (en banc) (declining to review the merits of an issue not argued on
    appeal and dismissing that portion of the appeal); Cacciola v. Gibson, 
    27 Vet. App. 45
    , 48 (2014) (same). In addition,
    the Board remanded the issue of entitlement to an extraschedular evaluation for service-connected left knee disability.
    R. at 4, 18-19. Because a remand is not a final decision of the Board subject to judicial review, the Court does not
    have jurisdiction to consider the remanded issue at this time. See Howard v. Gober, 
    220 F.3d 1341
    , 1344 (Fed. Cir.
    2000); Breeden v. Principi, 
    17 Vet. App. 475
    , 478 (2004) (per curiam order); 38 C.F.R. § 20.1100(b) (2017).
    3
    Subluxation is "an incomplete or partial dislocation." DORLAND'S at 1791.
    (Semilunar cartilage removal, symptomatic), and 5261 (Limitation of leg extension). The Court
    holds that evaluation of a knee disability under DCs 5257 or 5261 or both does not, as a matter of
    law, preclude separate evaluation of a meniscal disability of the same knee under DC 5258 or
    5259, and vice versa. The Court further holds that entitlement to a separate evaluation in a given
    case depends on whether the manifestations of disability for which a separate evaluation is being
    sought have already been compensated by an assigned evaluation under a different DC. In the
    context of evaluating musculoskeletal disabilities based on limitation of motion, a manifestation
    of disability has not been compensated, for separate evaluation and pyramiding purposes, if that
    manifestation did not result in an elevation of the evaluation under 38 C.F.R. §§ 4.40 and 4.45
    pursuant to the principles set forth in DeLuca v. Brown, 
    8 Vet. App. 202
    (1995).
    Accordingly, for the reasons that follow, the Court will reverse the Board's finding that the
    veteran's pain and swelling associated with his left knee meniscal disability were compensated by
    his 30% evaluation under DC 5257, set aside the portion of the January 2016 Board decision
    denying entitlement to a separate left knee evaluation based on locking or other manifestations of
    the semilunar cartilage, and remand that matter for further development and readjudication
    consistent with this decision.
    I. FACTS
    Mr. Lyles served on active duty in the U.S. Army from March 1987 to July 1990. R. at
    1399. He injured his left knee in service and, in January 1990, underwent a partial lateral
    meniscectomy with anterior cruciate ligament (ACL) reconstruction. See R. at 1381.
    In August 1990, Mr. Lyles filed a claim for service connection for a left knee injury, R. at
    1396; at the time, his chief complaint was instability, R. at 1381. In February 1991, a VA regional
    office (RO) granted service connection for left knee ACL tear with anterolateral instability and
    assigned a 10% evaluation under § 4.71a, DC 5257. R. at 1381-82. The RO subsequently
    increased the evaluation under that DC to 20% in March 1996 based on evidence of pain on
    walking and periodic "giving out," R. at 1350-51, and to 30% in July 1998 based on evidence of
    pain, swelling, weakness, and occasional "giv[ing] way," R. at 1233-34. The veteran did not
    appeal any of those decisions, and they became final.
    The instant case stems from the veteran's April 2001 claim for an increased left knee
    evaluation, R. at 1185, which was denied by the RO in February 2002, R. at 1137-39, and has been
    2
    on appeal ever since, see, e.g., R. at 3, 233-35 (Board's summaries of the procedural history of the
    claim).
    During the course of the appeal, Mr. Lyles has undergone two partial lateral
    meniscectomies of the left knee—first in May 2005, R. at 1040-41, and again in November 2009,
    R. at 597-99. Pre- and post-operative medical records and lay statements reflect left knee pain,
    weakness, buckling, instability, swelling, locking, giving way, popping, stiffening, and grinding,
    which caused, inter alia, falls and limitation of left knee extension. R. at 414-15, 492-95, 497-98,
    527, 551-55, 559-62, 566-67, 569, 597-98, 613-14, 618, 622, 625, 627, 629, 633, 636, 671-73,
    695, 715, 806, 830, 833, 859, 878, 880, 1060, 1141, 1185.
    Notably, at an April 2010 VA joints examination, Mr. Lyles reported that he experienced
    constant left knee pain that would increase to a 10 out of 10 during flare-ups. R. at 695-96. He
    indicated that he also suffered from left knee instability with giving way and that his left knee
    would frequently lock, resulting in a loss of 20 degrees of extension. R. at 695. On physical
    examination, he "lack[ed]" 20 degrees of active extension while seated and 15 degrees while lying
    down. R. at 697. The examiner noted pain and grimacing when he was passively extending the
    left knee and indicated that there was popping, grinding, and swelling throughout the range of
    motion. 
    Id. The examiner
    remarked that there was no additional loss of motion due to pain, lack
    of endurance, fatigue, weakness, or incoordination on repetition, but stated that he was unable to
    comment on the extent of any additional functional loss during flare-ups without resort to
    speculation because the veteran was not experiencing a flare-up during the examination. R. at 703.
    In December 2011, the Board continued the 30% evaluation for the left knee disability
    based on instability under DC 5257, exclusive of the periods that the veteran had been assigned a
    temporary total evaluation based on convalescence following the meniscectomies. R. at 463-81.
    The Board also awarded a separate 10% evaluation based on limitation of left knee extension under
    DC 5261 from October 12, 2001, to April 21, 2010, and a 30% evaluation thereafter. R. at 474.
    Mr. Lyles timely appealed to this Court, which, in October 2014, set aside the Board decision and
    remanded the case for readjudication because the Board had not adequately addressed whether the
    veteran was entitled to a separate left knee evaluation under DC 5258 or 5259. R. at 318.
    The case was subsequently returned to the Board, which, in April 2015, remanded for
    additional development, including a new VA joints examination. R. at 231-40. Mr. Lyles
    underwent the ordered examination in August 2015 and complained of left knee pain and 
    stiffness. 3 Rawle at 81
    . The examiner found objective evidence of left knee pain on weight-bearing, localized
    tenderness, and crepitus on physical examination; range of motion tests revealed left knee
    extension from 130 to 10 degrees, with no additional limitation of motion or functional loss on
    repetition. R. at 82. The examiner stated, however, that he could not offer an opinion, without
    resort to mere speculation, as to whether pain, weakness, fatigability, or incoordination resulted in
    additional functional loss with repeated use over time because there was "[n]o objective evidence"
    relevant to that issue. R. at 83. He also indicated that "[n]o response [was] provided" regarding
    flare-ups, 
    id., and that
    the overall severity of the veteran's left knee problems "is speculative," R.
    at 90.
    In January 2016, the Board issued the decision currently on appeal, R. at 2-19. The Board
    found that DC 5258 did not apply to the claim because the record did not reflect dislocation of
    semilunar cartilage; instead, it determined that DC 5259 applied because there was evidence of
    removal of semilunar cartilage. R. at 12. The Board acknowledged that the veteran experienced
    popping, locking, grinding, pain, swelling, looseness, and giving way or falling related to
    semilunar cartilage removal, but found that a separate evaluation under DC 5259 was not
    warranted because each of those symptoms was already "encompassed" by his current evaluations
    under DCs 5257 and 5261. 
    Id. Specifically, the
    Board indicated that the veteran's pain, swelling,
    looseness, and giving way or falling had been attributed to left knee lateral instability and were the
    very symptoms that formed the basis for the 30% evaluation under DC 5257. 
    Id. Similarly, the
    Board found that, because popping, grinding, and locking were symptoms of impaired motion,
    they were contemplated in the evaluation criteria for DC 5261 and had already "been considered
    in conjunction with the potential further impairment of motion" pursuant to DeLuca. R. at 13. The
    Board's DeLuca analysis consists primarily of its observation that there was "no clinical evidence
    that the [v]eteran has further range of motion impairment due to fatigability, incoordination, pain,
    or flare-ups, and the April 2010 and August 2015 examiners both commented that they could not
    say without resort to speculation what such impairment would be." R. at 16. Ultimately, the Board
    concluded that a separate left knee evaluation under DC 5259 would constitute impermissible
    pyramiding and denied the claim. 
    Id. This appeal
    followed.
    4
    II. THE PARTIES' ARGUMENTS
    In his briefs, Mr. Lyles argued that the Board clearly erred in finding that his 30%
    evaluations under DCs 5257 and 5261 encompassed all manifestations of his service-connected
    meniscal disability—namely, popping, locking, grinding, pain, and swelling—because the plain
    language of those DCs reflects that they cover only instability and limitation of leg extension,
    respectively. He therefore asserted that he has not yet been compensated for the full extent of his
    service-connected left knee impairment and that a separate evaluation under either DC 5258 or
    5259 is necessary to adequately account for those unaddressed manifestations. 4 Appellant's Brief
    (Br.) at 8-13; Reply Br. at 1-4.5 The Secretary responded that the Board properly found, consistent
    with VA's interpretation of the scope of DCs 5257 through 5261 as set forth in the VA Adjudication
    Procedures Manual (M21-1), that all manifestations of the veteran's left knee meniscal disability
    were accounted for in his 30% evaluations under DCs 5257 and 5261 and that evaluating those
    manifestations again under a different DC would constitute impermissible pyramiding. Secretary's
    Br. at 11-16 (citing M21-1, pt. III, subpt. iv. ch. 4, §§ A.4.i-j).
    Mr. Lyles pivoted slightly at oral argument, conceding that VA may consider knee pain,
    swelling, popping, locking, and grinding when assigning a limitation-of-motion evaluation under
    DC 5261 pursuant to DeLuca. He argued, however, that those manifestations of his service-
    connected meniscal disability had not been "compensated" in this case because the Board's DeLuca
    analysis had not resulted in an elevation of his 30% evaluation under DC 5261, meaning that
    evaluation of those manifestations under either DC 5258 or 5259 would not constitute pyramiding.
    Oral Argument at 8:40-17:20. The Secretary disagreed, asserting that the veteran's left knee pain,
    swelling, popping, locking, and grinding had already been considered under DC 5261 and could
    4
    Although the Secretary urged the Court not to entertain any argument pertaining to a separate evaluation
    under DC 5258 because Mr. Lyles did not challenge the Board's finding that the record reflected only removal, but
    not dislocation, of left knee semilunar cartilage, Secretary's Br. at 10-11, the veteran's principal brief contains
    numerous allegations that the Board erred in denying a separate evaluation under DC 5258, see, e.g., Appellant's Br.
    at 1, 7-13, and his reply brief explicitly challenged the Board's finding in that regard, Reply Br. at 1-2. Accordingly,
    the Court concludes that the veteran's arguments encompass entitlement to a separate evaluation under either DC 5258
    or 5259.
    5
    Mr. Lyles also argued that the Board erred in not assigning a separate evaluation under DC 5258 or 5259
    because, during a prior appeal to this Court, the Secretary conceded, R. at 292, and the Court agreed, R. at 318, that
    the Board had provided inadequate reasons or bases for its decision in failing to address potential entitlement to a
    separate evaluation under those DCs. Appellant's Br. at 9; Reply Br. at 2. The Board remedied that specific reasons-
    or-bases error in the decision currently on appeal by considering the potential applicability of DCs 5258 and 5259. R.
    at 12-13. Contrary to the veteran's contention, neither the Secretary's concession nor the Court's conclusion in the
    prior appeal compelled an award of a separate evaluation under DC 5258 or 5259.
    5
    not be considered again under DC 5258 or 5259, even though after considering those factors the
    Board held that they did not lead to elevation of the evaluation under DC 5261 pursuant to DeLuca.
    
    Id. at 51:09-51:40.
    III. ANALYSIS
    A. The Relevant DCs
    Before addressing the parties' arguments, it is necessary to review the DCs involved in this
    appeal. Mr. Lyles is currently in receipt of a 30% evaluation under DC 5257, which provides:
    Knee, other impairment of:
    Recurrent subluxation or lateral instability:
    Severe                         30
    Moderate                       20
    Slight                         10
    38 C.F.R. § 4.71a, DC 5257 (2017). He has also been assigned a 30% evaluation under DC 5261,
    which provides:
    Leg, limitation of extension of:
    Extension limited to 45°        50
    Extension limited to 30°        40
    Extension limited to 20°        30
    Extension limited to 15°        20
    Extension limited to 10°        10
    Extension limited to 5°         0
    38 C.F.R. § 4.71a, DC 5261.
    Mr. Lyles is seeking a separate evaluation under either DC 5258 or 5259; the former
    provides a 20% evaluation for "Cartilage, semilunar, dislocated, with frequent episodes of
    'locking,' pain, and effusion into the joint," whereas the latter provides a 10% evaluation for
    "Cartilage, semilunar, removal of, symptomatic." 38 C.F.R. § 4.71a, DCs 5258, 5259.
    B. Availability of a Separate Meniscal Evaluation
    We now turn to the primary legal issue presented in the parties' briefs: Does evaluation of
    a knee disability under DC 5257 or 5261 preclude, as a matter of law, separate evaluation of a
    meniscal disability of the same knee under DC 5258 or 5259? We hold that it does not.
    Ordinarily, all disabilities—including those arising from a single disease entity—are to be
    evaluated separately. 38 C.F.R. § 4.25(b) (2017) ("Except as otherwise provided in this schedule,
    the disabilities arising from a single disease entity . . . are to be rated separately as are all other
    disabling conditions, if any."). The individual evaluations are then combined in the manner
    6
    prescribed in the combined ratings table to determine the veteran's overall impairment in earning
    capacity, with combined evaluations corresponding to different statutory amounts of monthly
    disability compensation. 38 C.F.R. § 4.25; see Amberman v. Shinseki, 
    570 F.3d 1377
    , 1380-81
    (Fed. Cir. 2009) (describing the mechanics of combined evaluation under § 4.25); see also
    38 U.S.C. § 1114 (setting forth the monthly rates of wartime disability compensation); 38 U.S.C.
    § 1155 (instructing that percentage evaluations in the rating schedule "be based, as far as
    practicable, upon the average impairments of earning capacity resulting from such injuries in civil
    occupations"); 38 C.F.R. § 4.1 (2017) (implementing regulation for section 1155).
    One regulatory exception to the general rule that separate disabilities are to be evaluated
    separately is VA's anti-pyramiding provision, which provides that "evaluation of the same
    disability under various diagnoses"—including "evaluation of the same manifestation under
    different diagnoses"—"is to be avoided."          38 C.F.R. § 4.14 (2017) (emphasis added); see
    
    Amberman, 570 F.3d at 1380
    (noting this "exception to the ordinary process of separately rating
    and then combining ratings").
    The rationale for the prohibition on pyramiding is that "the rating schedule may not be
    employed as a vehicle for compensating a claimant twice (or more) for the same symptomatology"
    because "such a result would overcompensate the claimant for the actual impairment" in earning
    capacity suffered. Brady v. Brown, 
    4 Vet. App. 203
    , 206 (1993); see 
    Amberman, 570 F.3d at 1380
    -
    81 ("VA regulations caution against making multiple awards for the same physical impairment
    simply because that impairment could be labeled in different ways. It is the veteran's overall
    disability that is relevant, not the name of the causative disorder or disorders." (internal citation
    omitted)). "Of course, it is possible for a veteran to have separate and distinct manifestations
    attributable to two different disability ratings, and, in such a case, the veteran should be
    compensated under different diagnoses." Fanning v. Brown, 
    4 Vet. App. 225
    , 230 (1993).
    The crux of the Secretary's argument that, as a matter of law, evaluation under DC 5257 or
    5261 precludes separate evaluation under DC 5258 or 5259, and vice versa, is that the meniscal
    DCs are so broadly drawn that they necessarily encompass recurrent subluxation, lateral
    instability, and limitation of motion, such that evaluation under DC 5257 or 5261 and DC 5258 or
    5259 would necessarily result in duplicate compensation of the same manifestations of knee
    disability in violation of § 4.14. Secretary's Br. at 15-16; see M21-1, pt. III, subpt. iv. ch. 4, § A.4.i
    (directing adjudicators not to assign separate evaluations under DC 5261 and DC 5258 or 5259
    7
    because "LOM [(limitation of motion)] of the knee is contemplated by the meniscus DCs"); M21-
    1, pt. III, subpt. iv. ch. 4, § A.4.j (directing adjudicators not to assign separate evaluations under
    DC 5257 and DC 5258 or 5259 because "[t]he criteria for both of those codes"—i.e., DCs 5258
    and 5259—"contemplate instability"). The Secretary's interpretation, however, is contrary to the
    plain meaning of § 4.71a and the Court therefore need not afford it any deference. See Southall-
    Norman v. McDonald, 
    28 Vet. App. 346
    , 352-54 (2016) (rejecting the Secretary's interpretation of
    a regulation because it was contrary to the regulation's plain language); Tropf v. Nicholson,
    
    20 Vet. App. 317
    , 320 (2006) (explaining that, when "the meaning of the regulation is clear from
    its language, then that is 'the end of the matter'" and deference to the agency's position is not
    warranted (quoting Brown v. Gardner, 
    513 U.S. 115
    , 120 (1994))); see also Petitti v. McDonald,
    
    27 Vet. App. 415
    , 422 (2015) ("Regulatory interpretation begins with the language of the
    regulation, the plain meaning of which is derived from its text and its structure.").
    Significantly, § 4.71a does not expressly prohibit separate evaluation under DC 5257 or
    5261 and a meniscal DC. See Esteban v. Brown, 
    6 Vet. App. 259
    , 261 (1994) (examining three
    scar DCs and concluding that separate evaluation under each of the DCs was available because
    "none of the three DCs in question provide[s] that a veteran may not be rated separately for the
    described conditions"); see also Yonek v. Shinseki, 
    722 F.3d 1355
    , 1358 (Fed. Cir. 2013)
    (examining a musculoskeletal DC to assess whether separate evaluation was permitted and noting
    that "nothing in the remainder of [§] 4.71a suggests that [the DC] does not mean what it says").
    As outlined above, § 4.25(b) directs adjudicators to evaluate each disability separately, "[e]xcept
    as otherwise provided in [the rating] schedule," and § 4.14 recognizes that "[d]isability from
    injuries to the muscles, nerves, and joints of an extremity may overlap to a great extent, so that
    special rules are included in the appropriate bodily system for their evaluation."
    The rating schedule is replete with rules that prohibit separate evaluation of other
    disabilities. See, e.g., 38 C.F.R. § 4.96(a) (2017) (forbidding separate evaluation of coexisting
    respiratory conditions and directing that "[a] single rating will be assigned under the [DC] which
    reflects the predominant disability with elevation to the next higher evaluation where the severity
    of the overall disability warrants such elevation"); 38 C.F.R. § 4.97, Note 3 to DC 6845 (2017)
    (providing, for evaluations under the General Rating Formula for Restrictive Lung Disease, that
    "[i]nvolvement of Muscle Group XXI (DC 5321) . . will not be separately rated"); 38 C.F.R.
    § 4.104, Note 2 to DC 7101 (2017) ("Evaluate hypertension due to aortic insufficiency or
    8
    hyperthyroidism, which is usually the isolated systolic type, as part of the condition causing it
    rather than by a separate evaluation."); 38 C.F.R. § 4.113 (2017) (noting that "[t]here are diseases
    of the digestive system, particularly within the abdomen, which, while differing in the site of
    pathology, produce a common disability picture characterized in the main by varying degrees of
    abdominal distress or pain, anemia and disturbances in nutrition" and cautioning that "certain
    coexisting diseases in this area . . . do not lend themselves to distinct and separate disability
    evaluations without violating the fundamental principle relating to pyramiding as outlined in
    § 4.14"); 38 C.F.R. § 4.114 (2017) ("Ratings under [DCs] 7301 to 7329, inclusive, 7331, 7342,
    and 7345 to 7348 inclusive will not be combined with each other. A single evaluation will be
    assigned under the [DC] which reflects the predominant disability picture, with elevation to the
    next higher evaluation where the severity of the overall disability warrants such elevation.");
    38 C.F.R. § 4.115 (2017) ("Separate ratings are not to be assigned for disability from disease of
    the heart and any form of nephritis, on account of the close interrelationships of cardiovascular
    disabilities.").
    Yet, the Secretary declined to include a similar prohibition against separate evaluation in
    the portion of § 4.71a governing evaluation of the knees. Given that the Secretary has repeatedly
    demonstrated that he knows how to craft regulations that expressly forbid separate evaluation of
    other disabilities, the lack of an express bar to separate evaluation of knee disabilities in § 4.71a
    must be read as a deliberate decision to permit separate evaluation. See 
    Yonek, 722 F.3d at 1359
    ("'Where an agency includes particular language in one section of a regulation but omits it in
    another, . . . it is generally presumed that the agency acts intentionally and purposely in the
    disparate inclusion or exclusion.'" (brackets omitted) (quoting Keene Corp. v. United States,
    
    508 U.S. 200
    , 208 (1993))); see also Jones v. Shinseki, 
    26 Vet. App. 56
    , 62 (2012) (holding that
    the Secretary's "failure to include the effects of medication as a criterion [in a particular DC] while
    including such effects as criteria under other DCs must [] be read as a deliberate choice");
    Buczynski v. Shinseki, 
    24 Vet. App. 221
    , 227 (2011) (explaining that the Secretary's omission from
    a DC of a limitation included in other DCs was an important factor in determining the plain
    meaning of the DC); 
    Tropf, 20 Vet. App. at 321
    n.1 ("[W]hen a statute or regulation omits a term
    in one place that is used in other places, that omission should be regarded as intentional and given
    effect.").
    9
    The history of § 4.71a confirms this interpretation. Since its inception in 1921, the rating
    schedule has included separate provisions for evaluating knee instability, limitation of leg
    extension, and meniscal problems. See, e.g., 1921 SCHEDULE FOR RATING DISABILITIES at 42-43.
    However, at no point in its 96-year history has the portion of the rating schedule pertaining to the
    knees included an express prohibition on separate evaluation of those manifestations of disability,
    despite numerous amendments. See id.; 1925 SCHEDULE FOR RATING DISABILITIES at 47; 1933
    SCHEDULE     FOR   RATING DISABILITIES, DCs 1814, 1818, 3156-57; 1945 SCHEDULE                        FOR   RATING
    DISABILITIES, DCs 5257-59, 5261; 38 C.F.R. § 4.71a, DCs 5257-59, 5261 (1965–present).
    The language and history of § 4.71a and the text of the surrounding provisions of the rating
    schedule unambiguously reflect that evaluation of a knee disability under DC 5257 or 5261 does
    not preclude, as a matter of law, separate evaluation of a meniscal disability of the same knee under
    DC 5258 or 5259. Nor does evaluation of a meniscal disability under DC 5258 or 5259 preclude,
    as a matter of law, separate evaluation of a different disability of the same knee under DC 5257 or
    5261.6 Therefore, the Court will not defer to the Secretary's interpretation of those DCs set forth
    in M21-1, pt. III, subpt. iv. ch. 4, §§ A.4.j-i, and will not read into § 4.71a a prohibition on separate
    evaluation under those DCs that contravenes the plain meaning of that regulation. See Southall-
    
    Norman, 28 Vet. App. at 352
    (concluding that a regulation was clear on its face and rejecting "the
    Secretary's attempts to read into the regulation a limitation to its applicability that is simply not
    there"); Ortiz-Valles v. McDonald, 
    28 Vet. App. 65
    , 71 (2016) (declaring that "[t]he Secretary
    cannot simply add restrictions to a regulation where they do not exist"); Burton v. Shinseki,
    
    25 Vet. App. 1
    , 5 (2011) (declining to infer a limitation from the text of 38 C.F.R. § 4.59); cf. Bates
    v. United States, 
    522 U.S. 23
    , 29 (1997) ("[W]e ordinarily resist reading words or elements into a
    statute that do not appear on its face.").
    C. Overlapping or Duplicative Manifestations of Disability
    Having concluded that evaluation of a knee disability under DCs 5257 or 5261 or both does
    not, as a matter of law, preclude separate evaluation of a meniscal disability of the same knee under
    DC 5258 or 5259, and vice versa, we now address the primary issue raised at oral argument: Have
    the symptoms of Mr. Lyles's left knee disabilities already been compensated under DCs 5257 and
    6
    Although not raised by the facts of this case, the foregoing analysis yields the same result for evaluation
    under 38 C.F.R. § 4.71a, DC 5260 (Limitation of leg flexion)—namely, that evaluation of a knee disability under DC
    5260 does not preclude, as a matter of law, separate evaluation of a meniscal disability of the same knee under DC
    5258 or 5259, and vice versa.
    10
    5261 such that separate evaluation under DC 5258 or 5259 is not warranted on the facts of this
    case?
    The Board concluded that Mr. Lyles's manifestations of left knee meniscus disability—
    popping, locking, grinding, pain, swelling, looseness, and giving way or falling, R. at 12—were
    not subject to separate evaluation under a meniscus DC because those manifestations had "already
    been considered by the ratings assigned under [DCs] 5257 and 5261," R. at 13. Specifically, the
    Board found that the manifestations of pain, swelling, looseness, and giving way or falling had
    "been attributed to [the veteran's] left knee lateral instability" and "form[ed] the very basis" of his
    30% evaluation under DC 5257. R. at 12. The Board also determined that the manifestations of
    popping, locking, and grinding were "contemplated" by his evaluation under DC 5261 and their
    impact on his range of motion had "been considered [under that DC] in conjunction with the
    potential further impairment of motion due to factors such as pain, weakness, lack of endurance[,]
    and fatigability" pursuant to DeLuca. R. at 13. This analysis, however, cannot be sustained on
    the record on appeal.
    1. Manifestations of Left Knee Disability Compensated Under DC 5257
    The Board first erred in finding that evaluation under DC 5257 compensated Mr. Lyles for
    manifestations of knee disability other than recurrent subluxation and lateral instability, such as
    pain and swelling. 7 As the U.S. Court of Appeals for the Federal Circuit (Federal Circuit)
    explained in Delisle v. McDonald, 
    789 F.3d 1372
    , 1375 (Fed. Cir. 2015), "DC 5257 is
    unambiguous; by its plain language, it provides compensation for veterans suffering from
    impairments of the knee, other than those enumerated elsewhere in the relevant regulations, that
    cause the symptoms of recurrent subluxation or lateral instability." In so holding, the Federal
    Circuit expressly rejected the veteran's argument in that case that DC 5257 should be read to
    include manifestations of knee disability other than recurrent subluxation or lateral instability,
    concluding that "DC 5257 is limited to establishing compensation for disabilities causing such
    specifically enumerated symptoms." 
    Id. VA's General
    Counsel came to a similar conclusion nearly two decades earlier, finding that
    DC 5257 expressly covered evaluation of recurrent subluxation and lateral instability of the knee
    7
    The Board also found that evaluation under DC 5257 compensated the veteran for looseness and giving
    way/falling. R. at 12. Mr. Lyles did not challenge the Board's finding in this regard, but rather conceded that such
    manifestations were "correctly rated" under that DC. Appellant's Br. at 10. The Court expresses no opinion as to the
    correctness of that concession.
    11
    "without reference" to any other manifestations. VA Gen. Coun. Prec. 23-97 (July 1, 1997).
    Although the General Counsel recognized that "a given [DC] need not include an exhaustive list
    of symptomatology," he cautioned that "the use of unspecified criteria for rating purposes could
    produce inconsistent evaluations due to lack of guidance to rating personnel." 
    Id. That is
    precisely
    what occurred here.
    By concluding that Mr. Lyles's 30% evaluation under DC 5257 compensated him for pain
    and swelling, manifestations other than recurrent subluxation or lateral instability, the Board read
    into the DC nonexistent evaluation criteria that foreclosed the possibility of separate evaluation
    under a meniscal DC. See Bankhead v. Shulkin, 
    29 Vet. App. 10
    , 22 (2017) (concluding that the
    Board "erred in applying a standard that exceeded that set forth in the relevant evaluation criteria");
    Pernorio v. Derwinski, 
    2 Vet. App. 625
    , 628 (1992) (same). That finding is directly contrary to the
    Federal Circuit's holding in Delisle and the General Counsel's guidance in Precedent Opinion 23-
    97, which is binding on the Board. 38 U.S.C. § 7104(c); Hornick v. Shinseki, 
    24 Vet. App. 50
    , 52
    (2010). Because DC 5257 compensates veterans only for knee impairment resulting in recurrent
    subluxation and lateral instability, the Board's finding that Mr. Lyles's 30% evaluation under DC
    5257 also compensated him for pain and swelling must be reversed. See Drosky v. Brown,
    
    10 Vet. App. 251
    , 255 (1997) (reversing a Board finding as legally erroneous that was based on
    factors outside and in excess of the evaluation criteria); Massey v. Brown, 
    7 Vet. App. 204
    , 207-08
    (1994) (reversing a Board finding that was based on factors "almost entirely" outside the evaluation
    criteria). As the VA General Counsel has advised, VA raters and Board members should avoid
    assigning a musculoskeletal evaluation to compensate for factors not covered in the DC under
    which evaluation is made. See VA Gen. Coun. Prec. 23-97.
    2. Manifestations of Left Knee Disability Compensated Under DC 5261
    This is not the end of the matter, however, because the foregoing error may be rendered
    harmless by a finding that all the manifestations of Mr. Lyles's left knee meniscus disability,
    including pain and swelling, were compensated by his 30% evaluation under DC 5261, thereby
    precluding separate evaluation of those manifestations under a meniscus DC. See 38 U.S.C.
    § 7261(b)(2) (requiring the Court to "take due account of the rule of prejudicial error"); Shinseki
    v. Sanders, 
    556 U.S. 396
    , 409 (2009) (explaining that "the burden of showing that an error is
    harmful normally falls upon the party attacking the agency's determination"). That is not the case
    here.
    12
    Part 4 of Title 38 of the Code of Federal Regulations contains the regulatory tools for
    evaluating musculoskeletal disabilities such as Mr. Lyles's service-connected left knee disabilities.
    It is comprised, in pertinent part, of the rating schedule for "The Musculoskeletal System,"
    38 C.F.R. §§ 4.40-4.73, and prescriptive regulations—including 38 C.F.R. §§ 4.40, 4.45, and
    4.59—that "explain how to arrive at proper evaluations under the DCs appearing [therein]," 
    Petitti, 27 Vet. App. at 424
    . Using these tools, an adjudicator may craft, in recognition of and deference
    to the foregoing regulations, a higher musculoskeletal evaluation than would otherwise be
    supported by mechanical application of a given DC. See Sharp v. Shulkin, 
    29 Vet. App. 26
    , 31-32
    (2017).
    This can happen in one of three ways. A veteran's evaluation may be elevated to a higher
    level where there is evidence that a service-connected musculoskeletal disability causes either
    (1) additional functional loss—i.e., "the inability . . . to perform the normal working movements
    of the body with normal excursion, strength, speed, coordination[,] and endurance"—including as
    due to pain and/or other factors, 38 C.F.R. § 4.40 (2017); or (2) reduction of a joint's normal
    excursion of movement in different planes, including changes in the joint's range of movement,
    strength, fatigability, or coordination, 38 C.F.R. § 4.45 (2017).         See Mitchell v. Shinseki,
    
    25 Vet. App. 32
    , 36-37 (2011); 
    DeLuca, 8 Vet. App. at 205-07
    .               Elevation of a veteran's
    musculoskeletal disability under either of these methods, colloquially known as the DeLuca
    factors, is based on additional functional loss with use or during flare-ups, which should, if
    feasible, be portrayed in terms of the degree of additional range-of-motion lost.           
    DeLuca, 8 Vet. App. at 206
    . Alternatively, a veteran (3) may be awarded the minimum compensable
    evaluation available under a given musculoskeletal DC, even if application of that DC would not
    support a compensable evaluation, where there is evidence of "actually painful, unstable, or
    malaligned joints." 38 C.F.R. § 4.59 (2017); see Southall-
    Norman, 28 Vet. App. at 352
    ; 
    Petitti, 27 Vet. App. at 425
    .
    When evaluating disabilities, including musculoskeletal disabilities, the aim of the rating
    schedule is to ensure that a claimant is properly compensated, but not overcompensated, for the
    actual level of impairment. See 
    Amberman, 570 F.3d at 1380
    -81; 
    Brady, 4 Vet. App. at 206
    . To
    that end, VA regulation prohibits duplicate compensation for the same manifestation of disability
    under different diagnoses. 
    Brady, 4 Vet. App. at 206
    ; 38 C.F.R. § 4.14; see generally Boggs v.
    Peake, 
    520 F.3d 1330
    , 1337 (Fed. Cir. 2008) ("[A] veteran cannot be compensated more than once
    13
    for the same disability."). It follows that, where a certain manifestation of a disability has not been
    compensated via an assigned evaluation under a particular DC, evaluation of that manifestation
    under another DC would not constitute pyramiding.            See 
    Fanning, 4 Vet. App. at 230
    . A
    manifestation of disability has not been compensated by an assigned evaluation if the manifestation
    is "distinct and separate" from the manifestations that form the basis of the assigned evaluation.
    Murray v. Shinseki, 
    24 Vet. App. 420
    , 423 (2011) (explaining that separate knee evaluations may
    be warranted where "the appellant's symptoms are distinct and separate" (internal quotation
    omitted)).
    Although the Court in Esteban broadly stated that the critical element for separate
    evaluation is that none of the symptoms for any one of the three facial injury residuals at issue in
    that case was duplicative of or overlapping with the symptoms of the other two 
    conditions, 6 Vet. App. at 262
    , the pyramiding inquiry does not end with whether two disabilities share a
    common manifestation, but continues to inquire whether that common manifestation would be
    improperly compensated more than once. This understanding was further expressly endorsed by
    the Secretary in General Counsel Precedent Opinion 9-2004, which concluded, citing Esteban, that
    limitation of leg flexion and extension of the same knee "must be rated separately [under DCs
    5260 and 5261, respectively,] to adequately compensate for functional loss associated with injury
    to the leg," even where pain is present during both motions. VA Gen. Coun. Prec. Op. 9-2004
    (Sept. 17, 2004) ("[T]he key consideration in determining whether rating under more than one
    [DC] is in order is whether the ratings under different [DCs] would be based on the same
    manifestation of disability or whether none of the symptomatology upon which the separate ratings
    would be based is duplicative or overlapping.") (emphasis added). As relevant here, where
    manifestations of a musculoskeletal disability causing additional functional limitation have not
    resulted in elevation of the evaluation pursuant to DeLuca, those manifestations have not yet been
    compensated for separate evaluation and pyramiding purposes.
    Mr. Lyles conceded at oral argument, and the Court agrees, that each of the manifestations
    of his left knee meniscus disability not compensated by DC 5257—i.e., pain, swelling, popping,
    locking, and grinding—could be compensated under DC 5261 pursuant to DeLuca.                      Oral
    Argument at 13:08-17:20. Indeed, § 4.40 recognizes that functional loss "may be due to pain" and
    § 4.45(f) expressly lists pain on movement and swelling as "related considerations" for evaluating
    joint disabilities. Although neither regulation explicitly mentions popping, locking, or grinding,
    14
    to the extent that those manifestations cause "disturbances of locomotion" or "interference with
    sitting, standing[,] and weight-bearing," they too are contemplated by § 4.45(f).8
    Notwithstanding that pain, swelling, popping, locking, and grinding could be compensated
    under DC 5261, the Board's reasons or bases for denying a higher left knee evaluation under DC
    5261 reveal that those manifestations have not yet been compensated in this case. The Board noted
    that the April 2010 VA examiner had found that the veteran's left leg extension was limited to 20
    degrees and that the record did not contain clinical evidence of any greater limitation of extension.
    R. at 16. Based on the demonstrated limitation of extension, it concluded that a 30% evaluation
    was appropriate under DC 5261 before considering the DeLuca factors. 
    Id. The Board
    then considered §§ 4.40 and 4.45 and explained that there was "no clinical
    evidence that the [v]eteran has further range of motion impairment due to fatigability,
    incoordination, pain, or flare-ups" because the April 2010 and August 2015 VA examiners "both
    commented that they could not say without resort to speculation what such impairment would be."
    
    Id. The Board
    noted the veteran's lay complaints of additional limitation of motion due to pain,
    but found that they were outweighed by unidentified clinical evidence, presumably, the April 2010
    and August 2015 examiners' opinions that any additional functional limitation could not be
    quantified without resort to speculation. 
    Id. Ultimately, the
    Board concluded that, "[w]ithout
    clinical medical evidence indicating such additional functional limitation, the Board is unable to
    find that the [v]eteran's pain is so disabling as to actually or effectively limit . . . extension of the
    left knee to such an extent as to warrant assignment of higher ratings." R. at 17. This analysis is
    inadequate in several respects, frustrating judicial review of whether, for separate evaluation
    purposes, Mr. Lyles's current 30% evaluation under DC 5261 compensated him for the pain,
    swelling, popping, locking, and grinding associated with his left knee meniscal disability.
    First, the Board focused solely on whether pain caused additional functional limitation
    sufficient to warrant an elevation of compensation under DC 5261 without discussing Mr. Lyles's
    other manifestations of left knee meniscal disability that may be covered by § 4.45. See R. at 16-
    17. The Board's failure to address whether swelling, popping, locking, or grinding caused
    additional functional limitation that would result in an elevation of his 30% evaluation under DC
    8
    Similarly, insofar as popping and grinding may be consistent with crepitus, those manifestations are
    contemplated by § 4.59.
    15
    5261 pursuant to DeLuca rendered inadequate its reasons or bases for finding that all the
    manifestations of his left knee meniscal disability had been compensated by the currently assigned
    evaluations.9 See 
    DeLuca, 8 Vet. App. at 207-08
    (concluding that the Board provided inadequate
    reasons or bases for its decision where it failed to properly consider § 4.40 in evaluating a
    musculoskeletal disability).
    Second, the Board's reliance on the April 2010 and August 2015 VA examiners' statements
    that they could not opine as to the presence and degree of any additional functional limitation
    during left knee flare-ups without resort to mere speculation violated the Court's recent holding in
    Sharp. In that case, a VA medical examiner indicated that it was not possible to estimate the extent
    of any additional functional loss during flare-ups of upper extremity disabilities without resorting
    to speculation because there was "no conceptual or empirical basis for making such a
    determination without directly observing function" during a flare-up, and the Board relied on that
    statement to deny higher upper extremity evaluations based on the DeLuca 
    factors. 29 Vet. App. at 30
    . On appeal, the Court set aside the Board decision and remanded the musculoskeletal claims
    for another VA medical examination because the examiner had not elicited from the veteran a
    description of his functional limitations during flare-ups and it was not clear from the examination
    report whether the examiner's inability to opine on that matter was the result of all procurable
    medical evidence or her individual inability to provide the requested opinion. 
    Id. at 34-37.
             The April 2010 and August 2015 VA examination reports in this case suffer from the same
    deficiencies as the VA examination report at issue in Sharp. Like the examiner in Sharp, the April
    2010 VA examiner in Mr. Lyles's case indicated that he could not quantify the extent of any
    additional functional limitation during flare-ups without resorting to speculation because he had
    not observed a flare-up during the examination, R. at 703, even though he had earlier noted the
    veteran's reports of additional impairment during flare-ups, R. at 696. The August 2015 VA
    examiner expressed a similar sentiment, noting that there was "[n]o objective evidence" pertinent
    to additional functional limitation with repeated use over time, that "[n]o response [was] provided"
    regarding flare-ups, and that any opinion as to the extent of the severity of the veteran's left knee
    problems in such situations would be "speculative." R. at 83, 90. As in Sharp, the examiners'
    statements in this case reflect personal reluctance to offer the medical opinions necessary for
    9
    To avoid this problem, raters should clarify the specific DeLuca factors, i.e., pain, swelling, et cetera, that
    form the basis of any elevated evaluation.
    16
    proper evaluation of a musculoskeletal disability in accordance with DeLuca, rather than a
    limitation of knowledge in the medical community at 
    large. 29 Vet. App. at 36
    (explaining that,
    "before the Board can accept an examiner's statement that an opinion cannot be provided without
    resort to speculation, it must be clear that this is predicated on a lack of knowledge among the
    'medical community at large' and not the insufficient knowledge of the specific examiner" (quoting
    Jones v. Shinseki, 
    23 Vet. App. 382
    , 390 (2010))). The Board's failure to address that deficiency
    in the April 2010 and August 2015 VA examinations thus rendered inadequate its discussion of
    the effect of the DeLuca factors on the veteran's current 30% evaluation under DC 5261. 
    Id. at 33;
    Jones, 23 Vet. App. at 392
    .
    Given the foregoing, it is clear that the Board has not yet properly assessed whether Mr.
    Lyles's pain, swelling, popping, locking, and grinding associated with his left knee meniscal
    disability have been compensated by his current left knee evaluations under DC 5261. Remand of
    the veteran's left knee meniscal disability claim is therefore warranted to determine whether
    separate evaluation of a meniscal disability under either DC 5258 or 5259 is warranted on the facts
    of this case or whether such evaluation would constitute impermissible pyramiding. See Tucker v.
    West, 
    11 Vet. App. 369
    , 374 (1998) (holding that remand is the appropriate remedy "where the
    Board has incorrectly applied the law, failed to provide an adequate statement of reasons or bases
    for its determinations, or where the record is otherwise inadequate"). The veteran is free on remand
    to present any additional arguments and evidence pertinent to this issue to the Board in accordance
    with Kutscherousky v. West, 
    12 Vet. App. 369
    , 372-73 (1999) (per curiam order). See Kay v.
    Principi, 
    16 Vet. App. 529
    , 534 (2002). The Court reminds the Board that "[a] remand is meant to
    entail a critical examination of the justification for [the Board's] decision," Fletcher v. Derwinski,
    
    1 Vet. App. 394
    , 397 (1991), and must be performed in an expeditious manner in accordance with
    38 U.S.C. § 7112.
    III. CONCLUSION
    Upon consideration of the foregoing, the Board's finding that the veteran's pain and
    swelling associated with his left knee meniscal disability were compensated by his 30% evaluation
    under DC 5257 is REVERSED; the portion of the January 14, 2016, Board decision denying
    entitlement to a separate left knee evaluation based on locking or other manifestations of the
    17
    semilunar cartilage is SET ASIDE; and that matter is REMANDED for further development and
    readjudication consistent with this decision. The balance of the appeal is DISMISSED.
    18