M.C. DEAN, INC. v. DISTRICT OF COLUMBIA DEPARTMENT OF EMPLOYMENT SERVICES, & ANTHONY LAWSON, Intervenor , 146 A.3d 67 ( 2016 )


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  •                               District of Columbia
    Court of Appeals
    No. 14-AA-1141
    JUL -7 2016
    M.C. DEAN, INC., et al.,
    Petitioners,
    v.
    DISTRICT OF COLUMBIA DEPARTMENT OF EMPLOYMENT SERVICES,
    Respondent,
    &                                                CRB-056-14
    ANTHONY LAWSON,
    Intervenor.
    On Petition for Review of an Order
    of the District of Columbia Compensation Review Board
    BEFORE: GLICKMAN, BLACKBURNE-Rigsby and MCLEESE, Associate Judges.
    JUDGMENT
    This case came to be heard on the administrative record, a certified copy of the
    agency hearing transcript and the briefs filed, and was argued by counsel. On
    consideration whereof, and as set forth in the opinion filed this date, it is now hereby
    ORDERED and ADJUDGED that the petition for review is granted, and the case
    is remanded to the Compensation Review Board (―CRB‖) for resolution of that legal
    question. Additionally, the case is remanded for clarification of the disability analysis.
    For the Court:
    Dated: July 7, 2016.
    Opinion by Associate Judge Anna Blackburne-Rigsby.
    Concurring opinion by Associate Judge Roy W. McLeese.
    Notice: This opinion is subject to formal revision before publication in the
    Atlantic and Maryland Reporters. Users are requested to notify the Clerk of the
    Court of any formal errors so that corrections may be made before the bound
    volumes go to press.
    DISTRICT OF COLUMBIA COURT OF APPEALS
    No. 14-AA-1141                           7/7/16
    M.C. DEAN, INC., ET AL., PETITIONERS,
    v.
    DISTRICT OF COLUMBIA DEPARTMENT OF EMPLOYMENT SERVICES, RESPONDENT,
    and
    ANTHONY LAWSON, INTERVENOR.
    Petition for Review of a Decision of the Compensation Review Board of the
    District of Columbia Department of Employment Services
    (CRB-056-14)
    (Argued September 16, 2015                                    Decided July 7, 2016)
    D. Stephenson Schwinn, with whom Raphael J. Cohen was on the brief, for
    petitioners.
    Karl A. Racine, Attorney General, Todd S. Kim, Solicitor General, and
    Loren L. AliKhan, Deputy Solicitor General, on the statement in lieu of brief for
    respondent.
    Eric M. May for intervenor.
    Before GLICKMAN, BLACKBURNE-RIGSBY, and MCLEESE, Associate Judges.
    Opinion for the court by Associate Judge BLACKBURNE-RIGSBY.
    Concurring opinion by Associate Judge MCLEESE at page 26.
    2
    BLACKBURNE-RIGSBY, Associate Judge:           Intervenor Anthony Lawson, a
    street light technician, filed for permanent partial disability benefits for impairment
    of both of his arms resulting from a neck and shoulder injury he sustained during
    the course of his employment with petitioner M.C. Dean, Inc. The Administrative
    Law Judge (―ALJ‖) awarded Mr. Lawson ―schedule‖ benefits based on a forty-
    five-percent (45%) permanent partial disability rating for Mr. Lawson‘s ―right
    upper extremity‖ and a thirty-percent (30%) permanent partial disability rating for
    his ―left upper extremity.‖1 M.C. Dean and its co-petitioner, insurer Zurich North
    America, appealed to the Compensation Review Board (―CRB‖), which affirmed
    the ALJ‘s order.
    On petition for review to this court, petitioners argue that the CRB erred by
    affirming the ALJ‘s compensation order that improperly (1) combined non-
    schedule impairments of the neck and shoulders and schedule impairments of the
    arms into assessments of the ―upper extremities‖ when awarding schedule
    disability benefits for the ―arms,‖ and (2) considered the impact of the impairments
    1
    ―Schedule‖ benefits automatically compensate for economic disability of
    particular parts of the body with a conclusively-presumed amount. ―Non-
    schedule‖ benefits are based on the actual wage loss that results from an economic
    disability. Here, Mr. Lawson sought only a schedule award for disabilities of both
    arms, while neck and shoulder disabilities give rise to non-schedule awards. The
    ALJ and CRB used the term ―upper extremity‖ throughout this case to support a
    schedule disability award for the ―arm.‖
    3
    on Mr. Lawson‘s personal, social, and occupational activities in addition to the
    statutory factors to increase the schedule disability award. We grant the petition
    for review, reverse the disability award, and remand for legal clarification by the
    CRB of the injuries attributable to the ―arm,‖ versus the upper extremity, pursuant
    to a schedule award and for new disability analysis by the ALJ consistent with
    D.C. Code § 32-1508 (3)(U-i) (2012 Repl.).
    I. Background
    Injury and Treatment
    On April 1, 2006, Mr. Lawson sustained an injury to his neck and shoulders
    while lifting a 200-pound transformer base during the course of his employment as
    a streetlight technician with M.C. Dean.2 Mr. Lawson first sought treatment less
    than two weeks after the injury. When the injury failed to heal, he began physical
    therapy in August 2007. Even after ongoing physical therapy and left rotator cuff
    surgery in February 2008, Mr. Lawson continued to experience discomfort in his
    2
    With the exception of temporary disability benefits collected during
    recuperation from the surgeries discussed herein, Mr. Lawson never stopped work
    or lost any wages, and M.C. Dean did not make any voluntary payments for
    permanent disability.
    4
    neck and both shoulders, which by October 2008 was radiating down his arms,
    producing numbness in both hands, and causing swelling in his right arm and hand.
    He was then referred to Dr. Moskovitz, an orthopedic surgeon who supervised Mr.
    Lawson‘s treatment through the administrative hearing in 2013. Mr. Lawson had
    spinal fusion surgery in October 2009, but he experienced only minor
    improvement and continued his physical therapy and consultation with Dr.
    Moskovitz. By February 2011, Mr. Lawson‘s ―major complaints‖ involved his
    arms rather than his neck and shoulders, including intermittent numbness and
    tingling when he turned his head or bent his elbows and pain in his wrists and
    triceps. Mr. Lawson‘s last treatment prior to the administrative hearing was carpal
    tunnel surgery on his right hand in December 2012.
    Administrative Proceedings and the ALJ’s Compensation Order
    Mr. Lawson filed his compensation claim in January 2012. Both parties
    obtained permanent partial impairment diagnoses for purposes of the litigation.
    Mr. Lawson‘s expert was treating physician Dr. Moskovitz, who was qualified as
    an expert in orthopedic surgery without objection. Dr. Moskovitz determined that
    Mr. Lawson had a twenty-seven percent (27%) impairment of the entire body on
    March 15, 2012, based on ―class III cervical spine impairment that is permanent
    5
    with modifiers for rotator cuff disease, AC [acromioclavicular] arthritis and
    persisting neuritis/CTS [carpal tunnel syndrome].‖       Because the District of
    Columbia Workers‘ Compensation Act (―the Act‖)3 recognizes separate schedule
    and non-schedule disabilities rather than compensating the percentage of full-body
    impairment, Mr. Lawson‘s counsel requested an adjusted calculation of the
    impairment specifically for the ―upper extremity (ies).‖ In his response dated May
    31, 2012, Dr. Moskovitz provided a new assessment of Mr. Lawson‘s condition
    based on the current edition of the American Medical Association Guides to the
    Evaluation of Permanent Impairment (―AMA Guides‖):            permanent physical
    impairment of the right upper extremity equal to nineteen percent (19%) of the
    whole person or thirty-one percent (31%) of the right upper extremity itself, and
    permanent physical impairment of the left upper extremity equal to nine percent
    (9%) of the whole person or sixteen percent (16%) of the left upper extremity
    itself. In his deposition, Dr. Moskovitz indicated that carpal tunnel surgery could
    improve the impairment assessments of each upper extremity by just one percent.
    The specifics of Dr. Moskovitz‘s methodology are important. In both his
    written assessments and his deposition, Dr. Moskovitz discussed the impairments
    of Mr. Lawson‘s neck, shoulders, arms, and hands together. He explained that the
    3
    D.C. Code §§ 32-1501 to -1545 (2012 Repl.).
    6
    current edition of the AMA Guides makes separation of specific impairments more
    difficult, which prompted him to initially evaluate impairment of the whole person.
    When separately assessing impairments of the left and right upper extremities, he
    did so with the understanding that ―[t]he upper extremity begins at the base of the
    skull.‖ Dr. Moskowitz found a causal link between the impairments and the April
    2006 injury with reasonable certainty.
    Petitioners paid for an independent expert evaluation of Mr. Lawson‘s
    injuries by Dr. Scheer, also an orthopedic surgeon. Applying the AMA Guides, he
    concluded in his final assessment completed July 2, 2012, that Mr. Lawson
    suffered only a ten percent (10%) impairment of the left upper extremity causally
    related to the April 2006 injury with no causally related impairment of the right
    upper extremity. Dr. Scheer identified a further two percent (2%) impairment of
    each upper extremity from ulnar neuropathy unrelated to the April 2006 injury.
    Mr. Lawson testified at the administrative hearing on February 14, 2013. He
    described his injury and the long series of treatments. Because the hearing was
    held just two months after his right hand carpal tunnel surgery, he could not yet
    determine whether the operation had improved his condition. He did not show any
    wage loss, but he indicated that he was assigned fewer job duties, was a less
    7
    efficient worker, and could no longer supplement his income with contract work.
    The record does not indicate how much income Mr. Lawson previously received
    from the supplemental contract work, and the parties had stipulated his weekly
    wages at $1120, which produces a statutory compensation rate of $745.4 He also
    described the impact of his injury on activities outside work, such as an inability to
    carry grocery bags and to play recreational sports.
    Mr. Lawson sought schedule benefits for a fifty-percent (50%) permanent
    partial disability of his right upper extremity and a thirty-percent (30%) permanent
    partial disability of his left upper extremity. In his post-hearing brief, Mr. Lawson
    explained that he sought ―a much higher disability rating than the [impairment]
    ratings‖ assigned by Dr. Moskovitz due to his ―limited opportunities for
    advancement based on his skills, work history, and the restrictions imposed by his
    disability.‖   In the compensation order, the ALJ credited Dr. Moskovitz, the
    treating physician, over Dr. Scheer, hired by the employer for purposes of
    litigation. The ALJ found Dr. Moskovitz‘s medical opinion to be more persuasive
    4
    $745 reflects the statutory amount of 66 ⅔% of Mr. Lawson‘s average
    weekly wage. See D.C. Code § 32-1508 (3). For complete loss of arm function, an
    employee receives 312 weeks‘ compensation. § 32-1508 (3)(A). Although the
    actual monetary award was not specified, it appears that Mr. Lawson would
    receive seventy-five percent (75%) of the value of an arm lost, producing a
    compensation amount of $174,330 (0.75 x $745/week x 312 weeks).
    8
    and consistent with the record, and the ALJ accepted his conclusions that Mr.
    Lawson‘s impairments resulted from the April 2006 work injury and that Mr.
    Lawson had reached maximum medical improvement. The ALJ therefore found
    that Mr. Lawson had a thirty-one percent (31%) impairment of the right upper
    extremity and a sixteen percent (16%) impairment of the left upper extremity based
    on Dr. Moskovitz‘s medical assessment.
    The ALJ then proceeded from the medical impairment analysis to the non-
    medical disability analysis to determine the extent of Mr. Lawson‘s permanent
    partial disability. Starting with the right upper extremity, the ALJ considered the
    five factors from D.C. Code § 32-1508 (3)(U-i): pain, atrophy, weakness, loss of
    endurance, and loss of function.      Based on Mr. Lawson‘s testimony and the
    medical evidence, the ALJ assigned ten percent permanent partial disability for
    pain, ten percent for weakness, and ten percent for loss of endurance. The ALJ
    then increased the disability finding by five percent for each of three other
    unidentified factors (referred to only as ―these finding‖ [sic] and ―these factors‖ in
    the compensation order) for ―a total 45 per cent disability of the right upper
    extremity.‖
    9
    Turning to the left upper extremity, the ALJ found ―the same symptoms
    affecting that body part as he does on the right side, although perhaps not as
    extreme.‖ The ALJ assigned five percent permanent partial disability for pain, five
    percent for weakness, and five percent for loss of endurance. The ALJ then
    considered the impact of the injury on Mr. Lawson‘s personal life, specifically on
    ―personal activities‖ such as sleeping and shopping, ―social activities‖ such as
    recreation, and ―occupational activities‖ such as independent contract work. The
    ALJ assigned an additional five percent disability for each of those activities,
    producing ―a total 30 per cent permanent partial disability of the left upper
    extremity.‖ The ALJ never considered whether the ―upper extremities‖ as defined
    by Dr. Moskowitz differed from the ―arms‖ as stated in the Act‘s schedule.
    Petitioners appealed to the CRB.
    The CRB’s Decision and Order
    Petitioners appealed the ALJ‘s compensation order to the CRB, arguing that
    the ALJ erred by (1) awarding schedule benefits for impairment of the arms based
    on non-schedule injury to the neck and shoulders and (2) considering personal,
    social, and occupational impacts beyond the scope of the economic disability
    10
    inquiry under D.C. Code § 32-1508 (3)(U-i).5 In its decision, the CRB noted that,
    ―It is axiomatic that disability experienced in a schedule member may be
    compensable even if the anatomical situs of this injury is a non-schedule body
    part,‖ citing WMATA v. District of Columbia Dep’t of Emp’t Servs. (Chang), 
    683 A.2d 470
    (D.C. 1996). The CRB determined that the ALJ‘s disability findings for
    Mr. Lawson‘s arms were supported by substantial evidence, regardless of other
    treatment or disability to the neck and shoulders.       The CRB did not address
    petitioners‘ argument that Dr. Moskowitz included the neck and shoulders, not just
    the arms, in the ―upper extremity‖ impairments that the ALJ fully credited and
    relied upon in determining the schedule disability awards.
    The CRB also held that the ALJ properly considered personal and social
    activities in his disability determination. It reasoned that ―[a] claimant‘s inability
    to perform personal or social activities can demonstrate an effect on the ability to
    perform job duties.‖ The CRB noted that an inability to carry groceries or play
    sports ―demonstrate[s] an inability to perform functions similar to those required
    by [Mr. Lawson‘s] job‖ that involves heavy lifting. It also found that an additional
    disability award for occupational activities was proper because ―consideration of a
    5
    Petitioners also challenged the ALJ‘s failure to credit them for the amount
    of temporary benefits paid after Mr. Lawson‘s various surgeries, but the CRB
    declined to address the issue because petitioners did not raise it before the ALJ.
    11
    disability‘s effect on occupational capacity is precisely what an ALJ is tasked to do
    when assessing schedule member permanent partial disability.‖             The CRB
    therefore affirmed the compensation order, and M.C. Dean and Zurich North
    America filed a petition for review with this court.
    II. Analysis
    A. Standard of Review
    ―Our review of a final order of the CRB is limited to determining whether
    the decision is arbitrary, capricious, an abuse of discretion, or otherwise not in
    accordance with law.‖ Reyes v. District of Columbia Dep’t of Emp’t Servs., 
    48 A.3d 159
    , 164 (D.C. 2012) (internal quotation omitted). We will affirm if ―(1) the
    agency made findings of fact on each contested material factual issue,
    (2) substantial evidence supports each finding, and (3) the agency‘s conclusions of
    law flow rationally from its findings of fact.‖ 
    Id. Although we
    review the decision
    of the CRB, we cannot ignore the ALJ‘s compensation order which is the subject
    of the CRB‘s review, and we will remand if the ALJ‘s factual findings are not
    supported by substantial evidence. 
    Id. Finally, when
    a petitioner challenges the
    CRB‘s interpretation of the Act, we defer to the agency‘s interpretation unless it is
    12
    ―unreasonable or in contravention of the language or legislative history of the
    statute.‖ Howard Univ. Hosp. v. District of Columbia Dep’t of Emp’t Servs.
    (Petway), 
    994 A.2d 375
    , 377 (D.C. 2010) (quotation omitted).
    B. Whether the Schedule Award for the “Upper Extremity” Was Appropriate
    The term ―upper extremity‖ used by Dr. Moskovitz in his assessment is not
    specifically defined in the Act or related regulations. Petitioners challenge whether
    the ―upper extremity‖ is synonymous with the term ―arm‖ used, but not
    specifically defined in, the Act for purposes of a schedule award. See D.C. Code
    § 32-1508 (3)(A). See generally Continental Ins. Cos. v. Pruitt, 
    541 S.W.2d 594
    ,
    595 (Tenn. 1976) (rejecting argument that ―upper left extremity‖ was equivalent to
    the left ―arm‖ for purposes of statutory workers‘ compensation schedule).
    Petitioners attack the methodology behind Dr. Moskovitz‘s upper extremity
    assessments because he began at the base of the skull and included impairments to
    the neck and shoulders. They contend that the mingling of the schedule (arm) and
    non-schedule (neck and shoulder) impairments required the ALJ to separate out the
    economic disability attributable to just the arms before making an award. Mr.
    Lawson counters that Dr. Moskovitz limited his assessment to arm impairments
    and the ALJ properly credited Dr. Moskovitz‘s diagnoses.
    13
    Our review of Dr. Moskovitz‘s deposition testimony in the record indicates
    that he included more than Mr. Lawson‘s arms in his assessment of the upper
    extremity impairments.    Specifically, in his initial assessment, Dr. Moskovitz
    explained that he ―combined everything related to cervical spine and shoulders as a
    whole person rating, and [he] understood later that the statutory requirements or
    regulatory requirements, whatever they are in the District of Columbia, require a
    different classification . . . .‖ Having included ―everything‖ in his whole person
    rating, Dr. Moskovitz did not exclude neck and shoulder impairments from his new
    calculations for the upper extremities because, in his view, ―[t]he upper extremity
    begins at the base of the skull.‖ The inclusion of everything beginning at the base
    of the skull — neck, shoulder, and arm impairments together — in both the ―whole
    person‖ and ―upper extremity‖ assessments is further reflected by Dr. Moskovitz‘s
    statements that the upper extremity impairments, if translated into a whole person
    impairment number, would be ―pretty consistent,‖ if not ―exactly the same figure,‖
    presumably because he was simply subdividing the exact same impairments into
    right and left sides. Finally, when asked for his ―opinion within a reason[able]
    degree of medical certainty as to the impairments of [Mr. Lawson‘s] upper
    extremities as a result of the April 1st, 2006 injury,‖ Dr. Moskovitz responded that
    ―the physical impairment of [Mr. Lawson‘s] right upper extremity is 31 percent
    based on residual neurological impairment, rotator cuff impairment and that his
    14
    physical impairment of the left upper extremity is 16 percent based on his cervical
    spine impairment and rotator cuff/arthritis treated surgically in the past.‖ 6 The
    references to impairments of the rotator cuff and cervical spine further reflect that
    Dr. Moskovitz adhered to his definition of ―upper extremity‖ and included
    impairments of the neck and shoulders up to ―the base of the skull.‖
    The terms ―arm‖ and ―upper extremity‖ are often used interchangeably for
    purposes of schedule awards. See, e.g., Negussie v. District of Columbia Dep’t of
    Emp’t Servs., 
    915 A.2d 391
    , 393–95 (D.C. 2007) (claimant sought ―a schedule
    award of 28% for permanent partial disability to the left arm‖ but the ALJ awarded
    ―six percent (6%) permanent partial disability for loss of industrial use of the left
    upper extremity‖). Yet Dr. Moskovitz‘s definition (―upper extremity begins at the
    base of the skull‖) reflects a potential distinction in the terms. See 7 Larson,
    Workers’ Compensation Law § 87.02, at 87-3 & n.4.1 (2015) (noting that
    physicians may be more comfortable discussing the upper and lower extremities
    than simply the arm and the leg). Without a clear determination from the CRB as
    to where the arm begins for purposes of a schedule award, a particular doctor‘s or
    6
    Petitioners also attack another aspect of Dr. Moskovitz‘s methodology,
    asserting he never determined anything except a whole-body impairment rating
    including all of Mr. Lawson‘s injuries. We need not resolve this issue because we
    have no reason to suppose that it will arise on remand.
    15
    ALJ‘s understanding of the terms ―arm‖ and ―upper extremity‖ may result in the
    inconsistent determination of schedule awards or, as petitioners contend here, in
    the arbitrary expansion or reduction of a schedule ―arm‖ award in a particular case.
    The fact that Mr. Lawson‘s injury was limited to the neck and shoulders
    does not prevent independent impairments of the arms because ―it is not the situs
    of the injury which determines whether a schedule award is payable; it is the situs
    of the disability resulting from the injury which is controlling.‖ 
    Petway, supra
    ,
    994 A.2d at 376–77 (quoting Kovac v. Avis Leasing Corp., H & AS No. 84-177,
    OWC No. 000792, at 6 (Director‘s Decision July 17, 1986)).            However, the
    Department of Employment Services has previously interpreted the Act to exclude
    the neck and shoulder from schedule arm awards. See Morrison v. District of
    Columbia Dept. of Emp’t Servs., 
    736 A.2d 223
    , 225–26 & n.1 (D.C. 1999)
    (collecting D.C. administrative cases distinguishing the arm from the shoulder for
    purposes of schedule awards). Morrison presented the inverse of this case: the
    claimant had suffered one injury that affected both his arm and his shoulder, but he
    was awarded only schedule benefits for the ―right upper extremity‖ despite also
    seeking non-schedule benefits based on evidence of his shoulder disability. 
    Id. at 226–27.
    We determined that ―right upper extremity‖ must have meant the arm
    without the shoulder because it produced a schedule award. 
    Id. at 226
    n.4. We
    16
    therefore remanded because a separate and distinguishable shoulder disability
    would be separately compensable as a non-schedule disability, subject to a
    showing of wage loss. 
    Id. at 228.
    Analogously, in Petway, we considered a
    claimant‘s eligibility for concurrent schedule and non-schedule awards based on
    impairment of the lower back and 
    legs. 994 A.2d at 376
    . We used the agency‘s
    terminology and affirmed the ―finding that the injuries to Ms. Petway‘s low[er]
    back and to her lower extremities were ‗separate and distinct disabilities‘ as
    described in Morrison . . . .‖ 
    Id. at 378–79.
    Although prior administrative decisions held that actual neck and shoulder
    impairments can only contribute to non-schedule disability awards, see 
    Morrison, supra
    , 736 A.2d at 225 n.1, the CRB affirmed the compensation order in this case
    in which the ALJ fully credited Dr. Moskovitz‘s upper extremity impairment
    assessment without grappling with the inclusion of neck and shoulder impairments
    in that assessment. The CRB is entitled to deference in its interpretation of the Act
    which does not explicitly define either the ―arm‖ or the ―upper extremity.‖ The
    CRB has expertise in the area of workers‘ compensation and could potentially
    conclude — though we take no position — that sound policy and legislative intent
    support a change in the scope of arm awards since Morrison was decided in 1999.
    Compare Dye v. Indus. Comm’n of Ariz., 
    736 P.2d 376
    , 378 (Ariz. 1987) (en banc)
    17
    (holding shoulder, though part of the ―left upper extremity,‖ is not included in a
    schedule award for the arm), and Safeway Stores, Inc. v. Indus. Comm’n of Ariz.
    (Peterson), 
    558 P.2d 971
    , 974 (Ariz. Ct. App. 1976) (collecting cases from several
    jurisdictions distinguishing the arm from the shoulders for workers‘ compensation
    awards), with Strauch v. PSL Swedish Healthcare Sys., 
    917 P.2d 366
    , 368–69
    (Colo. Ct. App. 1996) (stating that the court was ―not persuaded . . . as a matter of
    law that the shoulder is not part of the arm‖). Because the extent of the ―arm‖
    differentiates schedule awards and non-schedule awards, a definition of that
    boundary is essential. Looking at this case, while the rotator cuff may lie in a gray
    area on the border of the shoulder and arm (an important question that the CRB
    may need to resolve), cervical spine impairments plainly fall within the neck rather
    than the arm as previously understood. If the CRB has changed the scope of
    schedule awards for the ―arm‖ since Morrison was decided, it must state the
    change explicitly so that the Act may be uniformly applied.7
    7
    Petitioners also argue that the pain radiating from Mr. Lawson‘s neck-and-
    shoulder injury into his arms cannot serve as the basis for a schedule disability
    award for the arms because radiating pain alone does not constitute a separate and
    distinct disability. Mr. Lawson counters that the compensation order reflects the
    independent physical impairments of his arms. Location is significant only to the
    extent that the CRB determines that the ―arm‖ is not coextensive with the ―upper
    extremity‖ as assessed by Dr. Moskovitz.
    Because the situs of the disability controls rather than the situs of the injury,
    we have held that ―when a petitioner suffers multiple disabilities from a single
    (continued . . .)
    18
    We therefore remand for the CRB to clarify the definitions of ―arm‖ and
    ―upper extremity‖ so that the legal scope of schedule awards does not vary from
    case to case.
    (. . . continued)
    injury, that petitioner is entitled to both schedule and non-schedule benefits,
    subject to proof that the non-schedule disability led to wage loss.‖ 
    Morrison, supra
    , 736 A.2d at 226. The fact that Mr. Lawson‘s injury occurred to the neck
    and shoulders, even if eligible only for non-schedule benefits, does not preclude a
    schedule award for resulting impairment of the arms. See 
    id. at 227–28.
    It may,
    however, require separation of the impairments.
    Petitioners argue more narrowly that radiating pain alone is non-
    compensable beyond the impairment from which it radiates. See Johnson v.
    District of Columbia Water & Sewer Auth., CRB No. 11-013, OWC No. 583201,
    2011 DC Wrk. Comp. LEXIS 213 (Apr. 21, 2011). The rule applied in Johnson
    appears to cut against petitioners‘ bright-line test because the CRB explained that a
    claimant need only show ―distinct, separate, and identifiable functional impact,‖
    rather than completely separate diagnoses, to support schedule and non-schedule
    awards arising from one injury. 2011 DC Wrk. Comp. LEXIS 213, at *9–10
    (quoting 
    Kovac, supra
    , H & AS No. 84-177). Their radiating pain argument fails
    to take into account that the compensation order included substantial impairment
    findings beyond radiating pain, such as numbness, ―a loss of strength in [Mr.
    Lawson‘s] upper extremities, and physical limitations regarding overhead work.‖
    See Muhammad v. District of Columbia Dep’t of Emp’t Servs., 
    774 A.2d 1107
    ,
    1113 (D.C. 2001) (remanding a decision denying any disability where the claimant
    complained of ―pain, numbness, reduced coordination, and general dysfunction‖ in
    his hand).
    19
    C. Consideration of Personal, Social, and Occupational Activities
    Petitioners also raise an alternative argument challenging the ALJ‘s legal
    analysis. They contend the ALJ erred by first performing the standard five-factor
    analysis of § 32-1508 (3)(U-i) to arrive at thirty percent (30%) disability for the
    right upper extremity and fifteen percent (15%) disability for the left upper
    extremity, then increasing each upper extremity schedule disability award by
    fifteen percent (15%) based on additional factors not set forth in the statute. For
    the right upper extremity increase, the compensation order has only one sentence:
    ―Based upon these finding, [sic] I assign 5 per cent disability to each of these
    factors, for a total 45 per cent disability of the right upper extremity.‖ The other
    ―finding[s]‖ or ―factors‖ are never identified. For the left arm, the compensation
    order includes two paragraphs explaining the personal, social, and occupational
    limitations resulting from the disability before assigning an additional ―5 per cent
    permanent partial disability for the impact the work injury has caused impacting
    upon [Mr. Lawson‘s] activities in these areas for a total 30 per cent permanent
    partial disability of the left upper extremity.‖
    The ALJ‘s omission of the additional findings regarding the right upper
    extremity award prevents meaningful review of the decision. ―[A] reviewing court
    20
    . . . must know the reasons that underlie the decision made by the agency.‖ Jones
    v. District of Columbia Dep’t of Emp’t Servs., 
    41 A.3d 1219
    , 1224 (D.C. 2012).
    Petitioners argue that the ALJ relied on the same three factors laid out in the left
    upper extremity analysis — five percent increases each for personal, social, and
    occupational activities — when increasing the right upper extremity award. Mr.
    Lawson counters that the ALJ increased the award by the same three statutory
    factors used previously — pain, weakness, and loss of endurance — though he
    cannot explain why the ALJ would reiterate the same factors instead of awarding
    fifteen percent disability for each factor in the first instance. The debate between
    counsel at oral argument about the additional factors the ALJ used to determine the
    disability percentage reflects the lack of clarity in the ALJ‘s additional award for
    the right upper extremity. Because the ALJ ―fail[ed] to ‗explain its reasoning in
    arriving at a disability award‘‖ for the right upper extremity, ―we must remand the
    case back to the CRB.‖ Bowles v. District of Columbia Dept. of Emp’t Servs., 
    121 A.3d 1264
    , 1269 (D.C. 2015) (quoting 
    Jones, supra
    , 41 A.3d at 1225).
    Turning to the left upper extremity award, petitioners argue that the
    independent five-percent increases in the disability rating for personal, social, and
    occupational activities were improper. Mr. Lawson counters that consideration of
    personal and social activities falls within the ALJ‘s discretion when assessing the
    21
    economic disability resulting from a claimant‘s impairments. He further argues
    that consideration of occupational limitations is necessarily within the ALJ‘s role
    in determining disability.
    The ALJ relied on the general definition of non-medical disability in the
    AMA Guides as authority to award disability benefits for the impact of Mr.
    Lawson‘s impairment on his personal and social activities, not just his wage-
    earning capacity. 8   The CRB noted that ―it may appear that considering a
    8
    When amending the Act, the D.C. Council considered and rejected the
    direct use of the AMA Guides in determining disability. See Comm‘e Rpt. on Bill
    12-192, at 8 (Oct. 29, 1998); Negussie v. District of Columbia Dep’t of Emp’t
    Servs., 
    915 A.2d 391
    , 397 (D.C. 2007). Recognizing that they are merely Guides
    to the Evaluation of Permanent Impairment, the Council heeded the advice of the
    AMA that the Guides ―should not be used to make direct financial awards or direct
    estimates of disabilities.‖ Rpt. on Bill 
    12-192, supra, at 8
    . Instead, the Council
    adopted the five ―Maryland factors‖ as grounds for an ALJ to exercise discretion
    and find a disability rating that might differ from the impairment rating. Therefore,
    the statutory reference to the AMA Guides reflects the council‘s judgment that
    they are a reliable basis for medical opinions about physical impairment, not an
    intention to allow the American Medical Association to add factors to the District‘s
    workers‘ compensation law. In fact, even when making findings regarding
    physical impairment, the CRB has held that an ALJ cannot rely upon the AMA
    Guides unless (1) the parties have admitted them into evidence or (2) the ALJ
    plans to take judicial notice of the AMA Guides and gives the parties an
    opportunity to respond. See 
    Bowles, supra
    , 121 A.3d at 1270.
    The ALJ in this case deviated from both principles — it employed the AMA
    Guides in the disability analysis and did so without notice to the parties even
    though the AMA Guides were not admitted into evidence — relying upon the
    following passage in 
    Negussie, supra
    , 915 A.2d at 397 (quoting Getson v. WM
    (continued . . .)
    22
    disability‘s impact on personal or social activities should be beyond the scope of
    compensation offered for work-related injuries,‖ but it affirmed because such a
    restriction ―is shortsighted‖ since non-work activities could still ―demonstrate an
    effect on the ability to perform job duties.‖ The compensation order did not tie
    personal and social functions to the multi-factor framework of § 32-1508 (3)(U-i),
    however, for the ALJ instead provided a five-percent increase for limited ―sleep
    through the night and grocery shopping‖ (personal) and a five-percent increase for
    limited ―ability to participate in recreational activities‖ (social) without
    (. . . continued)
    Bancorp, 
    694 A.2d 961
    , 967–68 (Md. 1997)) (emphasis in original), without
    regard for context:
    As used in the [AMA] Guides, ‗impairment‘ means an alteration of an
    individual‘s health status that is assessed by medical means,
    ‗disability,‘ which is assessed by nonmedical means, means an
    alteration of an individual‘s capacity to meet personal, social, or
    occupational demands, or to meet statutory or regulatory requirements.
    This brief background in the AMA Guides was not intended, either by its authors
    or the D.C. Council, to be a source of legal factors, and it does not change the
    economic focus of the Act. See Comm‘e Rpt. on Bill 3-106, at 6 (Jan. 29, 1980)
    (outlining the ―earning capacity‖ and ―whole-man‖ theories of workers‘
    compensation before selecting the former, with a focus on ―replacement of wages
    lost by disabled worker[s]‖ and ―restoration of earning capacity‖). Negussie
    subsequently reiterates the longstanding principle that compensation under the Act
    is tied to loss of wage-earning capacity, not the existence of a medical injury. 
    See 915 A.2d at 397
    –98; see also Wheeless v. WMATA, H & AS No. 89-318, OWC No.
    091834, 1998 DC Wrk. Comp. LEXIS 463, at *3 (Apr. 1, 1998) (holding employer
    did not need to approve claimant‘s settlement with third-party tortfeasor where
    ―the payments that claimant received in the third party action were for non-
    economic damages and workers‘ compensation benefits are for economic loss‖).
    23
    demonstrating a nexus between those limitations and Mr. Lawson‘s ability to
    perform job duties.
    We conclude that the ALJ erred in failing to demonstrate a nexus between
    Mr. Lawson‘s personal and social activities and his wage earning capacity, and
    therefore the disability award should not have been increased by non-occupational
    consequences of an injury.      A schedule award should not increase based on
    functional impairment of personal and social activities because those are beyond
    the economic scope of the Act. 9 While the CRB‘s observation that personal and
    social activities may reflect work-related limitations is consistent with our holding,
    those activities are not independently compensable harms.           Contrary to our
    concurring colleague, we conclude that consideration of personal and social
    activities is only consistent with the legislative history and structure of the Act if
    there is a nexus to wage-earning capacity, so a remand on this issue is unnecessary.
    9
    Smith v. District of Columbia Dep’t of Emp’t Servs., 
    548 A.2d 95
    , 100
    (D.C. 1988), explains that ―compensation under the Act is predicated upon the loss
    of wage earning capacity, or economic impairment, and not upon functional
    disability or physical impairment.‖ See also Upchurch v. District of Columbia
    Dep’t of Emp’t Servs., 
    783 A.2d 623
    , 627 (D.C. 2001) (stating ―[d]isability is an
    economic and not a medical concept‖ based on the ―loss of wage-earning
    capacity‖).
    24
    The ALJ also found that Mr. Lawson‘s arm injuries imposed ―physical
    limitations regarding overhead work‖ causing an inability to perform some work
    assignments.   These functional limitations both narrowed Mr. Lawson‘s work
    assignments and his ability to seek second jobs as an independent contractor. As a
    result, the ALJ awarded five percent partial disability for occupational limitations.
    The CRB affirmed, reasoning that ―consideration of a disability‘s effect on
    occupational capacity is precisely what an ALJ is tasked to do.‖ Petitioners argue
    that the occupational limitations were de minimis and warranted no further award
    beyond the factor analysis, and Mr. Lawson again relies on Negussie and the ALJ‘s
    general discretion.
    We agree that determining ―occupational capacity is precisely what an ALJ
    is tasked to do,‖ but it is not clear that occupational capacity should be an
    independent factor evaluated in a vacuum. Limitations of occupational activities
    are assessed under the statutory structure (with the Maryland factors of pain,
    weakness, atrophy, loss of endurance, and loss of function), and our recent
    decisions have emphasized that variance from the physical impairment rating to the
    economic disability rating should be specifically explained. See 
    Bowles, supra
    ,
    121 A.3d at 1269–70 (remanding where disability award could not be derived from
    summation of the possible evidence: ―No combination of 7%, 8%, and 5% add[s]
    25
    up to just 10%‖); 
    Jones, supra
    , 41 A.3d at 1226 (remanding for additional findings
    where the basis for a 7% disability award ―and not, for example, 1%, 10% or 30%
    — is a complete mystery‖). On remand, the CRB should consider whether a
    compensation order must connect the specific impairments to a factor in the
    disability analysis instead of compensating occupational capacity in the abstract. If
    so, the ALJ‘s findings in this case regarding limited range of motion affecting job
    duties would still be relevant, and they might support an award increase for ―loss
    of function‖ under § 32-1508 (3)(U-i)(v).
    The ALJ did not clearly explain its award for the right upper extremity. The
    ALJ also erred by considering personal and social activities as independent factors
    in the left upper extremity disability analysis without demonstrating an economic
    nexus to wage-earning capacity. We therefore remand for new disability analysis
    by the ALJ and clarification of the role of ―occupational capacity‖ in the disability
    analysis by the CRB.10
    10
    Because we place no independent reliance on the AMA Guides, we need
    not decide Lawson‘s motion to strike.
    26
    III.   Conclusion
    In this case, the ALJ credited an expert whose assessment included all of the
    claimant‘s impairments to his neck, shoulder, and arm in the left and right ―upper
    extremity‖ assessments. Because the CRB has not clearly determined where the
    ―arm‖ ends for purposes of a schedule award under D.C. Code § 32-1508 (3)(A),
    or whether the statutory term ―arm‖ is actually synonymous with the medical term
    ―upper extremity,‖ we grant the petition for review and remand to the CRB for
    resolution of that legal question. Additionally, we remand for clarification of the
    disability analysis.
    So ordered.
    MCLEESE, Associate Judge, concurring: I concur in the judgment, and I join
    the court‘s opinion with the exception of n.8 and the full paragraph on p. 23. In the
    portions of the opinion that I do not join, the court appears to suggest that an award
    of permanent disability benefits based on partial impairment of a part of the body
    specifically listed in D.C. Code § 32-1508 (3) (2015 Supp.) (―scheduled permanent
    partial disability award‖) must be tied to ―loss of wage-earning capacity.‖ Ante at
    22 n.8. I would not rule so broadly. As the court explains, ante at 21-22, the CRB
    27
    did not decide in this case whether non-economic effects of an injury may properly
    be considered in determining a scheduled permanent partial disability award.
    Rather, the CRB upheld the ALJ‘s decision on the ground that the personal and
    social effects of an injury may be considered to the extent that those effects
    adversely affect a claimant‘s ability to perform job duties. Ante at 21-22. As the
    court further explains, however, the ALJ did not limit consideration of personal
    and social effects to those that adversely affected the claimant‘s ability to perform
    job duties. Ante at 22-23.
    Because we cannot affirm the CRB‘s basis for upholding the ALJ‘s decision,
    we would ordinarily remand for the CRB to consider in the first instance whether
    non-economic effects may properly be considered in determining a scheduled
    permanent partial disability award. See, e.g., Apartment & Office Bldg. Ass’n v.
    Public Serv. Comm’n, 
    129 A.3d 925
    , 930 (D.C. 2016) (―Generally, an
    administrative order cannot be upheld unless the grounds upon which the agency
    acted in exercising its powers were those upon which its action can be sustained.
    Thus, if a party asks this Court to affirm an agency order based upon a ground that
    was not considered by the agency, we ordinarily must remand for the agency to
    consider the new ground in the first instance.‖) (citations and internal quotation
    marks omitted). Remand for consideration by the agency in the first instance is not
    28
    required, however, if the question at issue could have only one permissible answer.
    
    Id. (―[R]emand is
    not required in cases where . . . it is clear what the agency's
    decision has to be.‖) (internal quotation marks omitted). I do not view this as such
    a case.
    The applicable statute, D.C. Code § 32-1508, arguably suggests that non-
    economic effects may properly be taken into account in determining a scheduled
    permanent partial disability award.      Specifically, section 32-1508 (3) provides
    specific monetary awards for permanent disability involving the complete loss of
    the use of specified parts of the body. It is well settled that the amount of such
    awards is not tied to a case-specific showing of economic effect.           See, e.g.,
    DeShazo v. District of Columbia Dep’t of Emp’t Servs., 
    638 A.2d 1152
    , 1156 (D.C.
    1994) (discussing prior codification of section 32-1508 (3), court explains that
    benefits are determined ―by reference to the type of injury suffered . . . without
    regard to actual wage loss. . . . The assumption underlying this approach is that,
    although the claimant may be able to continue working, the impact of the injury
    causing a permanent partial disability sooner or later will take its toll, and that the
    scheduled benefit will be an appropriate, if arbitrary, compensation to offset wage
    losses that eventually can be anticipated.‖).
    29
    When a listed body part is partially impaired rather than completely lost, the
    award is determined as a proportion of the award for a complete loss. D.C. Code
    § 32-1508 (3)(S).    For purposes of calculating that proportion, the statute
    authorizes consideration of the American Medical Association‘s Guides to the
    Evaluation of Permanent Impairment, along with five additional factors: pain,
    weakness, atrophy, loss of endurance, and loss of function.              D.C. Code
    § 32-1508 (3)(U-i). As we have explained, the AMA Guides assess the degree of
    medical impairment, not necessarily the degree of legal disability. Negussie v.
    District of Columbia Dep’t of Emp’t Servs., 
    915 A.2d 391
    , 397 (D.C. 2007). The
    five other statutory factors focus on the physical condition of the body part at issue
    and are not explicitly tied to a case-specific assessment of the economic effects of
    an injury.
    We have nevertheless held that scheduled permanent partial disability
    awards are not properly determined based solely on a non-economic medical
    determination as to the degree of physical impairment. 
    Negussie, 915 A.2d at 395-99
    ; see 
    id. at 399
    (―‗[D]isability‘ is an economic and legal concept which
    should not be confounded with a medical condition . . . .‖); D.C. Code
    § 32-1501 (8) (2012 Repl.) (defining ―disability‖ as ―physical or mental incapacity
    because of injury which results in the loss of wages‖). As far as I am aware,
    30
    however, we have not held that scheduled permanent partial disability awards must
    be tied entirely to a case-specific assessment of actual or predicted ―loss of wage-
    earning capacity.‖ Ante at 22 n.8. To the contrary, our decisions arguably leave
    room for ALJs to base scheduled permanent partial disability awards at least in part
    on considerations -- such as functional assessments of the degree of impairment --
    that are not tied to a case-specific assessment of actual or predicted loss of wage-
    earning capacity. See, e.g., Brown v. District of Columbia Dep’t of Emp’t Servs.,
    
    83 A.3d 739
    , 743 n.6 (D.C. 2014) (amount of scheduled permanent partial
    disability award ―varies depending on the particular body part injured and the
    degree of its impairment, regardless of the actual wage loss the worker sustains as
    a result of the injury‖); Jones v. District of Columbia Dep’t of Emp’t Servs., 
    41 A.3d 1219
    , 1224 (D.C. 2012) (in determining scheduled partial permanent
    disability awards, ALJs ―come[] to a conclusion based on a complex of factors,
    taking into account physical impairment and potential for wage loss‖) (emphasis
    added).
    In determining the amount of the award in this case, the ALJ gave
    independent weight to the injury‘s effects on ―personal and social activities.‖ The
    CRB did not rule in this case as to whether such effects, untied to actual or
    predicted economic impact, may properly be considered in determining the amount
    31
    of a scheduled permanent partial disability award. I would remand for the CRB to
    address that issue in the first instance.