Larry Collins v. Commissioner of Social Security , 357 F. App'x 663 ( 2009 )


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  •                   NOT RECOMMENDED FOR FULL-TEXT PUBLICATION
    File Name: 09a0810n.06
    No. 08-6473                                    FILED
    Dec 18, 2009
    UNITED STATES COURT OF APPEALS                         LEONARD GREEN, Clerk
    FOR THE SIXTH CIRCUIT
    LARRY W. COLLINS,                                         )
    )
    Plaintiff-Appellant,                               )
    )
    v.                                                        )   ON APPEAL FROM THE UNITED
    )   STATES DISTRICT COURT FOR
    COMMISSIONER OF SOCIAL SECURITY,                          )   THE EASTERN DISTRICT OF
    )   TENNESSEE
    Defendant-Appellee.                                )
    )
    )
    Before: GRIFFIN and KETHLEDGE, Circuit Judges; and CARR, District Judge.*
    JAMES G. CARR, DISTRICT JUDGE. Plaintiff-Appellant Larry W. Collins appeals from
    a district court order affirming the Commissioner’s determination that he was not disabled and,
    therefore, not entitled to Disability Insurance Benefits [DIB] or Supplemental Security Income [SSI].
    On appeal, Collins challenges the decision of the Administrative Law Judge [ALJ], arguing: 1) the
    ALJ’s residual functional capacity [RFC] determination is not supported by substantial evidence;
    and 2) the ALJ erred in relying on the Medical-Vocational Guidelines to determine whether there
    is other work in the national economy that Collins can perform.
    For the reasons discussed below, we AFFIRM the judgment of the district court.
    *
    The Honorable James G. Carr, Chief Judge of the Northern District of Ohio, sitting by
    designation.
    1
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    Background
    Claimant applied to the Social Security Administration for DIB and SSI on May 26, 2004.
    (Administrative Record [AR] at 53-55). The Commissioner of the Social Security Administration
    [Commissioner] denied his applications both initially and on reconsideration, and claimant requested
    an administrative hearing.
    Claimant was born on October 30, 1952, and was forty-eight years old on July 15, 2001, the
    alleged disability onset date. He has a ninth grade education, and last worked as a laborer in
    construction on a pipe crew for three and a half to four years. He was fired from this job on July 15,
    2001, after arguing with his boss. He alleges disability based on mental impairments.1
    On November 3, 2004, claimant underwent a consultative examination by Alice Garland,
    M.S. 
    Id. at 163-68.
    Claimant reported that he had been depressed and nervous for approximately
    eighteen months. He reported that a friend and girlfriend had recently committed suicide. Claimant
    reported additionally that he had been taking Zoloft for approximately six months, and that the
    medication helped his symptoms, but made him nervous and did not help him sleep. He also reported
    that he drank alcohol several times a week, or whenever he could afford it.
    1
    Claimant initially alleged both physical and mental impairments. However, on appeal, he
    does not challenge the ALJ’s determination that he has no physical impairment. We, therefore, only
    address claimant’s claims of mental impairment. See Hollon v. Comm’r of Soc. Sec., 
    447 F.3d 477
    ,
    491 (6th Cir. 2006) (“[W]e limit our consideration to the particular points that [claimant] appears
    to raise in her brief on appeal.”).
    2
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    Claimant told Garland that he visited with people daily, did some grocery shopping, and
    prepared and ate simple meals. He also told Garland that he thought he could work if his hernia were
    fixed and “if he could find a job that he liked and could get along.” 
    Id. at 167.
    Garland diagnosed claimant with major depressive disorder, alcohol abuse, polysubstance
    abuse in remission, borderline to low average intellectual functioning, and personality disorder not
    otherwise specified. She assigned him a Global Assessment of Functioning [GAF] score of
    fifty/fifty-five.2
    On November 9, 2004, a state physician reviewed claimant’s medical records. 
    Id. at 169-86.
    The physician stated that claimant was “able to remember and carry out simple instructions/tasks,
    detailed [with] some difficulty at times, but can still do so.” 
    Id. at 185.
    The reviewing physician
    further opined that claimant was “able to interact [with the] general public [with] some difficulty at
    times, but still can do so” and that claimant was “able to respond to routine changes.” 
    Id. Claimant entered
    Lakeshore Mental Health Institute with suicidal ideations from July 29,
    2005, to August 3, 2005.
    In September 2005, claimant began receiving treatment from Cherokee Mental Health. 
    Id. at 221-38.
    His treating psychiatrist diagnosed him with bipolar disorder and polysubstance abuse.
    2
    A GAF score of fifty-one to sixty “indicates moderate symptoms (e.g., flat affect and
    circumstantial speech, occasional panic attacks), or moderate difficulty in social, occupational, or
    school functioning (e.g., few friends, conflicts with peers or co-workers).” Kornecky v. Comm’r of
    Soc. Sec., 167 F. App’x 496, 503 (6th Cir. 2006) (internal quotation omitted). A GAF score of forty-
    one to fifty “indicates serious symptoms (e.g., suicidal ideation, severe obsessional rituals, frequent
    shoplifting) or any serious impairment in social, occupational, or school functioning (e.g., no friends,
    unable to keep a job).” 
    Id. 3 No.
    08-6473
    Collins v. Comm’r of Soc. Sec.
    He was assigned a GAF score of sixty. In October 2005, the psychiatrist reported that claimant was
    “generally pleased” with the benefits of psychotropic medications, but reported he had occasional
    visual hallucinations. 
    Id. at 231.
    The psychiatrist also noted that claimant’s mood was “reasonably
    modulated” and that his thinking was “coherent.” 
    Id. He assigned
    claimant a GAF score of fifty-five.
    During the course of his treatment at Cherokee Mental Health, claimant’s GAF score increased from
    a low of fifty to sixty-five in April 2006, and sixty in July 2006.
    At the hearing before the ALJ on May 9, 2007, claimant testified about his work history,
    symptoms and medical treatment. 
    Id. at 239-55.
    He testified that he had applied for work after losing
    his job as a construction laborer working on a pipe crew, but had been rejected. He stated that he had
    tried to find employment at a body shop and mowing lawns. He testified that he was not hired
    because of the medication he was taking, and because he “never could show up on time [because he
    would] always miss the ride to work.” 
    Id. at 245.
    Claimant testified that he lived alone in a mobile home and that his sister is his only source
    of income. He said he gets his meals from a store near where he lives, and eats them at home. He
    also testified that sometimes medication helps his nerves and sometimes it does not, and that when
    it does not, he stays inside and sleeps and watches the news and weather on television. Later in the
    hearing, he testified that he cannot follow a news program because he cannot “concentrate for a real
    long period of time,” and that he gets “angry most of the time at the stuff that’s on TV.” 
    Id. at 251-
    52.
    On May 25, 2007, the ALJ found claimant not disabled. The ALJ summarized claimant’s
    medical treatment records and determined that: 1) claimant was not engaged in substantial gainful
    4
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    activity; 2) claimant had several severe impairments: status post hernia repair, hepatitis B, cirrhosis,
    depression and a personality disorder; 3) claimant’s impairments are not of listing severity; and 4)
    claimant is unable to perform past relevant work.
    The ALJ then determined that claimant had no physical limitations, but some mental
    limitations: “[H]e would be able to remember and carry out simple instructions; however, would
    have moderate limitation in detailed instructions but still can do [sic]; [he is] able to interact with
    general public at times but still can do [sic] and is able to respond to routine changes.” 
    Id. at 19.
    The
    ALJ determined that claimant’s subjective complaints were not entirely credible, noting his history
    of treatment, the reports of the treating and examining medical sources, and the inconsistencies in
    claimant’s testimony. The ALJ lastly determined that there are jobs in the national economy that
    claimant could perform.
    The ALJ’s decision became the final decision of the Commissioner when the Appeals
    Council denied claimant’s request for review on September 24, 2007.
    Claimant subsequently filed the present action with the district court, which overruled
    claimant’s objections and adopted the Report and Recommendation of the Magistrate Judge finding
    that the ALJ’s decision was supported by substantial evidence. The district court denied claimant’s
    motion for summary judgment and granted defendant’s motion for summary judgment. This appeal,
    over which we have jurisdiction under 42 U.S.C. § 405(g) and 28 U.S.C. § 1291, followed.
    5
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    Discussion
    1. Standard of Review
    The Commissioner’s final decision is subject to review under 42 U.S.C. § 405(g), which
    provides, inter alia: “The findings of the Commissioner of Social Security as to any fact, if supported
    by substantial evidence, shall be conclusive.” Substantial evidence is “‘more than a mere scintilla.
    It means such relevant evidence as a reasonable mind might accept as adequate to support a
    conclusion.’” Richardson v. Perales, 
    402 U.S. 389
    , 401 (1971) (quoting Consolidated Edison Co.
    v. NLRB, 
    305 U.S. 197
    , 229 (1938)).
    We “‘must affirm the Commissioner’s conclusions absent a determination that the
    Commissioner has failed to apply the correct legal standards or has made findings of fact
    unsupported by substantial evidence in the record.’” Colvin v. Barnhart, 
    475 F.3d 727
    , 729-30 (6th
    Cir. 2007) (quoting Walters v. Comm’r of Soc. Sec., 
    127 F.3d 525
    , 528 (6th Cir. 1997)).
    If we find the Commissioner’s decision supported by substantial evidence, we must defer to
    that decision “‘even if there is substantial evidence in the record that would have supported an
    opposite conclusion.’” Warner v. Comm’r of Soc. Sec., 
    375 F.3d 387
    , 390 (6th Cir. 2004) (quoting
    Wright v. Massanari, 
    321 F.3d 611
    , 614 (6th Cir. 2003)).
    2. Overview of the Process
    An individual is eligible for SSI benefits on the basis of financial need and either age,
    blindness, or disability. 42 U.S.C. § 1382(a). Disability is the inability “[t]o engage in any substantial
    gainful activity by reason of any medically determinable physical or mental impairment which can
    be expected to result in death or which has lasted or can be expected to last for a continuous period
    6
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    of not less than twelve months.” 
    Id. § 1382c(a)(3)(A).
    An individual will only be determined to be
    under a disability if his impairment or impairments are of such severity that he is not only unable to
    do his previous work, but cannot, considering his age, education and work experience, engage in any
    other kind of substantial gainful work which exists in the national economy. 
    Id. § 1382c(a)(3)(B).
    The ALJ, in determining whether a claimant is disabled, conducts a five-step analysis:
    1. If claimant is doing substantial gainful activity, he is not disabled.
    2. If claimant is not doing substantial gainful activity, his impairment must be severe
    before he can be found to be disabled.
    3. If claimant is not doing substantial gainful activity and is suffering from a severe
    impairment that has lasted or is expected to last for a continuous period of at least
    twelve months, and his impairment meets or equals a listed impairment, claimant is
    presumed disabled without further inquiry.
    4. If claimant's impairment does not prevent him from doing his past relevant work,
    he is not disabled.
    5. Even if claimant's impairment does prevent him from doing his past relevant work,
    if other work exists in the national economy that accommodates his residual
    functional capacity and vocational factors (age, education, skills, etc.), he is not
    disabled.
    
    Walters, 127 F.3d at 529
    (citing 20 C.F.R. § 404.1520).
    Under the five-step inquiry, the claimant bears the burden of proof through the first four
    steps, and the Commissioner bears the burden of proof at the final step. Jones v. Comm’r of Soc.
    Sec., 
    336 F.3d 469
    , 474 (6th Cir. 2003). To prevail at step five, the Commissioner must “identify a
    significant number of jobs in the economy that accommodate the claimant’s residual functioning
    capacity,” 
    id., taking into
    account factors such as age, education, and skills. 
    Walters, 127 F.3d at 529
    .
    7
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    In this case, the ALJ determined that claimant carried his burden of proof through the first
    four steps, and demonstrated that he was “unable to perform any of his past relevant work” under
    20 C.F.R. § 404.1565. This court’s inquiry is thus limited to whether substantial evidence supports
    the ALJ’s determination at step five of the inquiry—namely, whether substantial evidence supports
    the ALJ’s determination of claimant’s RFC and the availability of jobs in significant numbers that
    accommodate his limitations.
    3. RFC
    Claimant’s first argument on appeal is that the ALJ’s RFC determination is not supported
    by substantial evidence. He contends specifically that the record indicates that his mental
    impairments are more severe and limiting than determined by the ALJ, and that the ALJ was required
    to discuss and provide a basis for rejecting the mental limitations identified by Garland in her report.
    The Commissioner argues that the ALJ’s decision is supported by substantial evidence.
    A social security disability claimant’s RFC is an assessment of “the most [he] can still do
    despite [his] limitations.” 
    Id. § 404.1545(a)(1).
    In making this determination, the ALJ must consider all relevant evidence in the case record.
    Id.; Social Security Ruling [SSR] 96-8, 
    1996 WL 374184
    , at *5. This evidence includes medical
    records, opinions of treating physicians, and the claimant’s own description of his limitations. 20
    C.F.R. § 404.1545(a)(3). The ALJ is required to evaluate every medical opinion received. 
    Id. § 404.1527(b).
    If the ALJ rejects a treating physician’s opinion, he or she must provide a basis for this
    rejection. Shelman v. Heckler, 
    821 F.2d 316
    , 321 (6th Cir. 1987).
    8
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    The ALJ is, additionally, “charged with the responsibility of observing the demeanor and
    credibility of witnesses therefore his conclusions should be highly regarded.” Bradley v. Sec’y of
    Health & Hum. Servs., 
    862 F.2d 1224
    , 1227 (6th Cir. 1988). Discretion is “vested in the ALJ to
    weigh all the evidence.” 
    Id. On review,
    “we are to accord the ALJ’s determinations of credibility
    great weight and deference particularly since the ALJ has the opportunity, which we do not, of
    observing a witness’s demeanor while testifying.” 
    Jones, 336 F.3d at 476
    . In reviewing an ALJ’s
    credibility determination, “we are limited to evaluating whether or not the ALJ’s explanations for
    partially discrediting [claimant’s testimony] are reasonable and supported by substantial evidence
    in the record. 
    Id. We may
    not on appeal “try the case de novo, nor resolve conflicts in evidence .
    . . .” Gaffney v. Bowen, 
    825 F.2d 98
    , 100 (6th Cir. 1987).
    Claimant asserts that the ALJ’s RFC determination is incorrect because the ALJ did not
    properly consider Garland’s evaluation. We find the ALJ’s RFC determination is supported by
    substantial evidence.
    The ALJ determined that claimant could perform unskilled work at all exertional levels. The
    ALJ found explicitly:
    After careful consideration of the entire record, the undersigned finds that the
    claimant has no physical limitation aside. However, he would be able to remember
    and carry out simple instructions; however, would have moderate limitation in
    detailed instructions but still can do [sic]; [he is] able to interact with general public
    with some difficulty at times but still can do [sic] and is able to respond to routine
    changes.
    (AR 19).
    9
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    Contrary to claimant’s assertion, the ALJ considered, and did not “summarily reject[]”
    Garland’s opinion. This case is thus distinguishable from Shelman, 
    821 F.2d 316
    , on which claimant
    relies. Shelman involved directly contradicting medical opinions, whereas, in the present case the
    medical opinions are not contradictory. In Shelman, the court was concerned that the ALJ relied on
    the opinion of a medical expert in discounting the opinion of a treating physician. 
    Id. at 321.
    The ALJ in this case did not wholly reject Garland’s opinion as to claimant’s mental
    limitations. Garland found that claimant “may be limited in [his] ability to do very detailed and
    complex work,” “[his] [c]oncentration was poor,” “[his] ability to get along with people, by history
    has been moderately to severely limited,” “[he] would have difficulty responding to criticism and
    accepting instructions from others,” and “[his] ability to get along with the public appears to be
    moderately to severely limited.” (AR 18, 168).
    In determining claimant’s RFC, the ALJ found that claimant “would have moderate
    limitation in detailed instructions but still can do [sic],” and that he would be “able to interact with
    general public with some difficulty at times but still can do [sic] and is able to respond to routine
    changes.” 
    Id. at 19.
    These findings are consistent with Garland’s opinion that “[claimant] does cook,
    does visit, [and] does go to the grocery store.” 
    Id. at 168.
    The ALJ noted that claimant “has required only conservative mental health treatment other
    than the one time hospitalization in 2005,” and that “[h]is treating mental health clinicians have
    treated him conservatively with psychotropics and therapy.” 
    Id. at 20.
    The record supports this
    finding. The Cherokee Mental Health physician noted that claimant’s symptoms were somewhat
    10
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    alleviated by medication and records reflect that claimant’s GAF score improved over time with
    medical treatment.
    Garland diagnosed claimant with “[m]ajor depressive disorder, recurrent, moderate to
    severe.” 
    Id. at 167.
    The ALJ noted Garland’s observation that the depressive disorder “may be more
    moderate though based on [his] daily activities.” 
    Id. at 18,
    167.
    In determining claimant’s RFC, the ALJ also considered claimant’s testimony about his own
    mental limitations. At the hearing before the ALJ, claimant testified that when he is having a bad
    day, he stays home and watches the news and weather. The ALJ pointed out that this statement
    contradicted claimant’s later statement that he cannot sit and watch a television program without
    becoming angry, and that he cannot follow a news program. It is the ALJ’s responsibility to
    “observ[e] the demeanor and credibility of witnesses” and his conclusions on these issues “should
    be highly regarded.” 
    Bradley, 862 F.2d at 1227
    .
    Claimant himself told Garland that he could work “if his hernia were fixed” and “if he could
    find a job that he liked and could get along.” (AR 167). The record indicates that, in September
    2006, claimant underwent a hernia repair and nothing suggests that he suffers any continuing
    symptoms.
    The ALJ found that “claimant’s medically determinable impairments could reasonably be
    expected to produce the alleged symptoms, but that the claimant’s statements concerning the
    intensity, persistence and limiting effects of these symptoms are not entirely credible.” 
    Id. at 21.
    Based on this observation, the ALJ “conclude[d] that the claimant’s testimony concerning his
    11
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    symptoms and limitations is not supported by the evidence of record and is deemed not fully
    credible.” 
    Id. It is
    the ALJ’s place, and not the reviewing court’s, to “resolve conflicts in evidence.”
    
    Gaffney, 825 F.2d at 100
    . Based on our review of the record, we therefore hold that the ALJ’s RFC
    determination is supported by substantial evidence, including opinion evidence by Garland and the
    state agency physician, treatment records from Cherokee Mental Health, and claimant’s own
    testimony.
    4. The ALJ’s Reliance on the Medical-Vocational Guidelines
    Claimant’s second argument on appeal is that the ALJ improperly relied on the Medical-
    Vocational Guidelines, 20 C.F.R. Part 404, Subpart P, App’x 2 [Grids], and should instead have
    obtained testimony from a vocational expert before determining that there are jobs claimant could
    perform.
    The Commissioner has the burden at step five of the disability analysis of showing that there
    are a significant number of jobs in the economy that accommodate the claimant’s RFC and
    vocational profile. 
    Jones, 336 F.3d at 474
    .
    The Grids only take account of a claimant’s “exertional” impairments, i.e., impairments that
    “affect [a claimant’s] ability to meet the strength demands of jobs.” 20 C.F.R. § 404.1569a(b). A
    nonexertional impairment is one that affects a claimant’s “ability to meet the demands of jobs other
    than the strength demands.” 
    Id. § 404.1569a(c).
    Examples of nonexertional impairments include:
    “nervous[ness], anxious[ness], or depress[ion],” “difficulty maintaining attention or concentrating,”
    and “difficulty understanding or remembering detailed instructions.” 
    Id. 12 No.
    08-6473
    Collins v. Comm’r of Soc. Sec.
    The Commissioner may meet his burden at step five by referring to the Grids unless the
    claimant has a “nonexertional limitation[] that significantly limit[s] the range of work permitted by
    his exertional limitations.” Cole v. Sec’y of Health & Hum. Servs., 
    820 F.2d 768
    , 771 (6th Cir. 1987).
    “[B]efore reaching the conclusion that the grid will not be applied because [of the alleged]
    nonexertional limitations, those limitations must be severe enough to restrict a full range of gainful
    employment at the designated level.” Mullins v. Sec’y of Health & Hum. Servs., 
    836 F.2d 980
    , 985
    (6th Cir. 1987).
    The question in the present case is thus whether there is substantial evidence in the record
    to support the ALJ’s determination that claimant’s nonexertional limitations were not “significant”
    in that they did not have an effect on the occupational base of unskilled work at all exertional levels.
    If the nonexertional limitations were not significant, reliance on the Grids was appropriate.
    Where a claimant has solely nonexertional impairments, unskilled jobs at all levels of
    exertion make up the potential occupational base. SSR 85-15, 
    1985 WL 56857
    , *4. The mental
    demands of unskilled work are “the abilities (on a sustained basis) to understand, carry out, and
    remember simple instructions; to respond appropriately to supervision, coworkers, and usual work
    situations; and to deal with changes in a routine work setting.” Id..
    The ruling also describes unskilled jobs at all exertion levels as jobs that “ordinarily involve
    dealing primarily with objects, rather than with data or people, and they generally provide substantial
    vocational opportunity for persons with solely mental impairments who retain the capacity to meet
    the intellectual and emotional demands of such jobs on a sustained basis.” 
    Id. 13 No.
    08-6473
    Collins v. Comm’r of Soc. Sec.
    We find that ALJ properly relied on the Grids to find that there is other work in the national
    economy that claimant can perform and thus claimant is not disabled.
    At step five in the instant case, the ALJ found:
    If the claimant has solely nonexertional limitations, section 204.00 in the Medical-
    Vocational Guidelines provides a framework for decision-making (SSR 85-15).
    The claimant’s ability to perform work at all exertional levels has been compromised
    by nonexertional limitations. However, these limitations have little or no effect on the
    occupational base of unskilled work at all exertional levels. A finding of “not
    disabled” is therefore appropriate under the framework of section 204.00 of the
    Medical-Vocational Guidelines.
    (AR 22) (emphasis added).
    First, although the ALJ did not extensively evaluate SSR 85-15, the ALJ’s RFC
    determination tracks the language of the ruling. The ruling describes the mental demands of
    unskilled work as “the abilities (on a sustained basis) to understand, carry out, and remember simple
    instructions; to respond appropriately to supervision, coworkers, and usual work situations; and to
    deal with changes in a routine work setting.” SSR 85-15, 
    1985 WL 56857
    , *4. In determining
    claimant’s RFC, the ALJ found that “[claimant] would be able to remember and carry out simple
    instructions; however, [he] would have moderate limitation in detailed instructions but still can do
    [sic]; [he is] able to interact with [the] general public with some difficulty at times but still can do
    [sic] and [he] is able to respond to routine changes.” (AR 19).
    Second, as discussed above with regard to the ALJ’s RFC determination, substantial evidence
    supports the ALJ’s finding that claimant’s mental limitations did not limit his ability to perform
    unskilled work at all levels of exertion. Garland indicated that claimant “may be limited in ability
    14
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    to do very detailed and complex work,” but did not indicate that claimant would be unable to
    perform simple work. 
    Id. at 168.
    The Cherokee Mental Health treating psychiatrist reported that
    medication helped and records from the psychiatrist show this improvement over time.
    With regard to the ability to “respond appropriately to supervision, coworkers, and usual
    work situations,” SSR 85-15, 
    1985 WL 56857
    , *4, although claimant reported having some
    problems dealing with other people, he also reported that he tries to visit people daily. (AR 166).
    Garland opined that claimant “appears to be a person who would have difficulty responding to
    criticism and accepting instructions from others,” and that “[h]e may have much difficulty with
    authority figures.” 
    Id. at 168.
    Garland also opined that claimant’s “ability to get along with people,
    by history has been moderately to severely limited,” but emphasized that claimant “does visit” with
    others. 
    Id. With regard
    to claimant’s ability to respond to routine changes in the workplace, the
    reviewing physician opined that claimant would be able to respond to changes. 
    Id. at 185.
    Claimant
    himself told Garland that “he guessed he could work if his hernia were fixed [and] if he could find
    a job he liked and could get along.” 
    Id. at 167.
    There is, thus, substantial evidence in the record to support the ALJ’s determination that
    claimant’s mental impairments did not preclude any of the mental demands of unskilled work. His
    nonexertional limitations do not “significantly limit the range of work permitted by his exertional
    limitations,” 
    Cole, 820 F.2d at 771
    , and reliance on the Grids was therefore appropriate.3
    3
    Claimant contends that the ALJ’s own findings that: 1) he had no physical limitations; and
    2) he could not perform past relevant work, necessitate a finding that his nonexertional limitations
    15
    No. 08-6473
    Collins v. Comm’r of Soc. Sec.
    Conclusion
    For the foregoing reasons, we AFFIRM the judgment of the district court.
    have more than “little to no effect” on the occupational base of unskilled work and thus reliance on
    the Grids is inappropriate. Claimant’s past work was as a laborer, working construction on a pipe
    crew. He described his job duties as “cut[ting] and saw[ing] pipe, put[ting] pipe fittings together and
    lay[ing] pipe.” (AR 78). The classification of a job as skilled, semi-skilled, or unskilled, is governed
    by 20 C.F.R. § 1568, which provides, inter alia:
    (a) Unskilled work. Unskilled work is work which needs little or no judgment to do
    simple duties that can be learned on the job in a short period of time. The job may or
    may not require considerable strength. For example, we consider jobs unskilled if the
    primary work duties are handling, feeding and offbearing (that is, placing or
    removing materials from machines which are automatic or operated by others), or
    machine tending, and a person can usually learn to do the job in 30 days, and little
    specific vocational preparation and judgment are needed. A person does not gain
    work skills by doing unskilled jobs.
    (b) Semi-skilled work. Semi-skilled work is work which needs some skills but does
    not require doing the more complex work duties. Semi-skilled jobs may require
    alertness and close attention to watching machine processes; or inspecting, testing or
    otherwise looking for irregularities; or tending or guarding equipment, property,
    materials, or persons against loss, damage or injury; or other types of activities which
    are similarly less complex than skilled work, but more complex than unskilled work.
    A job may be classified as semi-skilled where coordination and dexterity are
    necessary, as when hands or feet must be moved quickly to do repetitive tasks.
    The ALJ could have reasonably concluded, based on the record, that claimant’s past work was semi-
    skilled work. The ALJ’s findings, therefore, that 1) claimant could not perform any past work, and
    2) that his nonexertional limitations have little to no effect on the occupational base of unskilled
    work, are not inconsistent. Substantial evidence thus supports the ALJ’s factual conclusion that
    claimant’s nonexertional limitations are not significant.
    16