                                                                          F I L E D
                                                                   United States Court of Appeals
                                                                           Tenth Circuit
                     UNITED STATES COURT OF APPEALS
                                                                          OCT 16 2003
                            FOR THE TENTH CIRCUIT
                                                                      PATRICK FISHER
                                                                               Clerk

    DAVID LOPEZ,

                Plaintiff-Appellant,

    v.                                                   No. 03-2035
                                                (D.C. No. CIV-02-303 LH/LCS)
    JO ANNE B. BARNHART,                                   (D.N.M.)
    Commissioner of Social Security,

                Defendant-Appellee.


                            ORDER AND JUDGMENT            *




Before HARTZ , BALDOCK , and McCONNELL , Circuit Judges.



         After examining the briefs and appellate record, this panel has determined

unanimously to grant the parties’ request for a decision on the briefs without oral

argument. See Fed. R. App. P. 34(f); 10th Cir. R. 34.1(G). The case is therefore

ordered submitted without oral argument.

         Claimant David Lopez appeals from a district court order affirming the

Commissioner’s decision denying his application for supplemental security


*
      This order and judgment is not binding precedent, except under the
doctrines of law of the case, res judicata, and collateral estoppel. The court
generally disfavors the citation of orders and judgments; nevertheless, an order
and judgment may be cited under the terms and conditions of 10th Cir. R. 36.3.
income and disability insurance benefits. The Commissioner concluded that

claimant was not disabled within the meaning of the Social Security Act because,

despite his limitations, he was able to perform a significant number of jobs that

exist in the national economy. We affirm in part, and reverse and remand in part

for further proceedings.

       Claimant filed applications for benefits in 1999 and 2000, alleging inability

to work due to arthritis, gastroesophageal reflux disease and depression. His

applications were denied initially and on reconsideration. Following a hearing

before an administrative law judge (ALJ), the ALJ found that claimant was

impaired by chronic low back pain, arthritis, major depression with anxiety, and

gastroesophageal reflux, and that these impairments precluded him from doing his

past relevant work. The ALJ further found that claimant retained the residual

functional capacity (RFC) to perform simple, non-public, light work with

occasional postural limitations and not involving concentrated exposure to

heights. The ALJ determined that claimant was not disabled at step five of the

five-step sequential process,   see Williams v. Bowen , 844 F.2d 748, 750-52 (10th

Cir. 1988), because he could perform substantially the full range of light work.

Although the ALJ questioned a vocational expert (VE), he used Rule 202.17 from




                                          -2-
the Medical-Vocational Guidelines (the “grids”), 20 C.F.R. pt. 404, subpt. P, app.

2, to conclude that claimant was not disabled.    1



       This court reviews the Commissioner’s decision to determine only whether

the relevant findings are supported by substantial evidence in light of the entire

record, and whether the Commissioner applied the correct legal standards.      O'Dell

v. Shalala , 44 F.3d 855, 858-59 (10th Cir. 1994). “Substantial evidence is such

relevant evidence as a reasonable mind might accept as adequate to support a

conclusion.”   Id. at 858 (quotation omitted). “Evidence is insubstantial if it is

overwhelmingly contradicted by other evidence.”       Id. In the course of our review,

we may “neither reweigh the evidence nor substitute our judgment for that of the

[Commissioner].”     Casias v. Sec'y of Health & Human Servs.    , 933 F.2d 799, 800

(10th Cir. 1991). “Failure to apply the correct legal standard or to provide this

court with a sufficient basis to determine that appropriate legal principles have

been followed is grounds for reversal.”     Byron v. Heckler , 742 F.2d 1232, 1235

(10th Cir. 1984) (quotation omitted).




1
       Rule 202.17 directs a conclusion of not disabled where a claimant’s
relevant medical and vocational characteristics precisely match those identified in
the table incorporating the rule (Table No. 2 of Appendix 2), namely, a residual
functional capacity to perform light work, a younger individual (age 45-49), a
limited education or less (at least literate and able to communicate in English),
and no or only unskilled previous work experience.

                                            -3-
      On appeal, claimant first contends the ALJ’s assessment of his mental

impairment is unsupported by substantial evidence and is legally erroneous.

Based largely upon the mental RFC assessment report and Psychiatric Review

Technique Form completed by Dr. Walker, a reviewing psychiatrist, the ALJ

found that claimant had marked limitations in his abilities to understand,

remember, and carry out detailed instructions, and to interact appropriately with

the general public, but that claimant would still be capable of performing simple,

non-public, light work.

      Claimant contends the ALJ’s assessment of his mental impairment is not

supported by substantial evidence because it ignored Dr. Walker’s conclusion that

claimant required a solitary work setting. We disagree. Dr. Walker concluded

that claimant could “work in a relatively solitary work setting such as his prior

custodial work.” Appellant’s App., Vol. II, at 162. The ALJ’s finding that

claimant could work in a simple, non-public work setting fully takes into account

the limitations found by Dr. Walker.

      We also disagree with claimant’s assertion that either the ALJ or

Dr. Walker failed to give sufficient weight to the report of Dr. Sacks, a one-time

examining physician. The ALJ accurately noted Dr. Sacks’ observation that

claimant would have great difficulty dealing with fellow workers and supervisors,

could not drive himself, and would have difficulty adapting to changes in the


                                         -4-
work place, understanding even simple instructions, with maintaining the

attention required to perform simple tasks and withstanding the stress and

pressure associated with day-to-day work activities. The ALJ also noted

Dr. Sacks’ observation that claimant had only tried one anti-depressant because he

had previously refused to take anti-depressant medication.

       The ALJ did not specifically discuss Dr. Sacks’ conclusion that claimant’s

Global Assessment of Functioning (GAF) score “during the last year and currently

is about 40.” Id., at 158. The GAF scale is used by clinicians to report an

individual’s overall level of functioning.     See American Psychiatric Assoc.,

Diagnostic and Statistical Manual of Mental Disorders 32 (Text Revision 4th ed.

2000). A GAF of 31-40 indicates “[s]ome impairment in reality testing or

communication . . . OR major impairment in several areas, such as work. . .,

family relations, [or] judgment,” while a GAF of 41-50 indicates “[s]erious

symptoms . . . OR any serious impairment in social or occupational . . .

functioning.”   Id., at 34.

       Contrary to claimant’s contention, a GAF score of 40 may indicate

problems that do not necessarily relate to the ability to hold a job.   See id . Thus,

standing alone, the GAF score does not evidence an impairment seriously

interfering with claimant’s ability to work. “While a GAF score may be of

considerable help to the ALJ in formulating the RFC, it is not essential to the


                                              -5-
RFC’s accuracy.”     Howard v. Comm’r of Soc. Sec . 276 F.3d 235, 241 (6th Cir.

2002) (holding that “ALJ’s failure to reference the GAF score in the RFC,

standing alone, does not make the RFC inaccurate”). Dr. Sacks did not indicate

that claimant could not work. His assessment of claimant’s GAF score, standing

alone, does not undermine, nor is it “significantly probative” evidence in

opposition to, the ALJ’s ultimate conclusions concerning the seriousness of

claimant’s mental status or ability to work.         Briggs ex rel. Briggs v. Massanari   ,

248 F.3d 1235, 1239 (10th Cir. 2001) (holding that ALJ “may not ignore evidence

that does not support his decision, especially when that evidence is significantly

probative” (quotation omitted)).

       Claimant also appears to argue that the ALJ failed to give proper

consideration to the reports of Dr. Vega, his treating physician. It is, however,

clear that the ALJ thoroughly considered Dr. Vega’s findings. Indeed, it appears

that the ALJ based much of his conclusion that claimant’s depression and anxiety

was related to situational stressors and that he could function without medication

on Dr. Vega’s reports that claimant declined any treatment for his depression,

reported feeling better once he opened a car detailing shop, was able to function

and did not require medication for his mental condition, and was managing rather

well on Xanax for his anxiety, which he took only on an as-needed basis.




                                               -6-
       We conclude that the ALJ properly considered all of the medical evidence

and that substantial evidence supports the ALJ’s assessment of claimant’s mental

impairment. The ALJ did not misinterpret or misapply the medical evidence, and

it is clear from our review of the evidence that the ALJ’s assessment of claimant’s

mental RFC was based on his consideration of the record as a whole. What

claimant is essentially asking is that this court reweigh the evidence relating to

his depression and anxiety, and to substitute our judgment for that of the ALJ,

which, of course, we cannot do.       See Casias , 933 F.2d at 800.

       Next, claimant asserts that the ALJ erred in relying on the grids to find that

he was not disabled, arguing that his nonexertional mental impairment of major

depression with anxiety prevented reliance on the grids. As a general rule, the

grids may not be used conclusively if the claimant has nonexertional impairments

that limit the ability to do the full range of work within a classification.     See

Thompson v. Sullivan , 987 F.2d 1482, 1488 (10th Cir. 1993). In the case of a

claimant who suffers from nonexertional impairments, or a combination of

exertional and nonexertional impairments, that prevent him from performing a full

range of work at a given exertional level, the grids may be used only as a guide,

and the Commissioner must prove through expert vocational testimony that jobs

exist in the national economy which the claimant can perform.            See Channel v.




                                              -7-
Heckler , 747 F.2d 577, 581-83 (10th Cir. 1984); 20 C.F.R. §§ 404.1569a(c)(2),

416.969a(c)(2).

       In this case, the ALJ found that claimant has a nonexertional mental

impairment of major depression with anxiety and that this impairment is severe.

Appellant’s App., Vol. II, at 14.   See 28 C.F.R. §§ 404.1569a(c)(1)(i)-(iii),

416.969a(c)(1)(i)-(iii) (stating that nonexertional limitations include difficulty in

functioning due to anxiety or depression, handling detailed instructions, or

maintaining attention and concentration). “[R]esort to the grids is particularly

inappropriate when evaluating nonexertional limitations such as . . . mental

impairments.”    Hargis v. Sullivan , 945 F.2d 1482, 1490 (10th Cir. 1991).

       The ALJ also concluded that claimant could not perform all light work

jobs. Consistent with the evidence that the claimant has marked limitations in his

abilities to understand, remember, and carry out detailed instructions, and to

interact appropriately with the general public, the ALJ determined that claimant

was restricted to light work that was simple and non-public. Appellant’s App.,

Vol. II, at 17, 19.

       Although the ALJ determined that the range of light work jobs claimant

could perform was restricted to simple, non-public work, he found that claimant’s

restrictions did not significantly compromise his ability to perform light work.

Admittedly, the grids may be used to direct a conclusion if the claimant’s


                                           -8-
nonexertional impairments do not significantly reduce the underlying job base.

See Evans v. Chater , 55 F.3d 530, 532 (10th Cir. 1995) (holding that ability to

perform a “substantial majority of the work in the designated RFC category”

justifies use of the grids). “The ALJ, however, must back such a finding of

negligible effect with the evidence to substantiate it.”      Talbot v. Heckler ,

814 F.2d 1456, 1465 (10th Cir. 1987). We find insubstantial support in the record

for the ALJ’s determination of that finding, however. The ALJ’s conclusion that

claimant could perform most light work jobs was not supported by the VE’s

testimony or any other source. Accordingly, we remand the case for the limited

purpose of obtaining vocational expert testimony or other additional evidence of

the effect of the identified nonexertional limitations on claimant’s ability to do

substantially the full range of light work.

       The judgment of the district court is AFFIRMED in part and REVERSED

in part, and the cause is REMANDED to the district court with directions to

remand the action to the Commissioner for further proceedings consistent with

this order and judgment.



                                                           Entered for the Court



                                                           Bobby R. Baldock
                                                           Circuit Judge

                                             -9-
