                                                            [DO NOT PUBLISH]

               IN THE UNITED STATES COURT OF APPEALS

                       FOR THE ELEVENTH CIRCUIT
                      _____________________________
                                                            FILED
                               No. 07-15541        U.S. COURT OF APPEALS
                                                     ELEVENTH CIRCUIT
                           Non-Argument Calendar     FEBRUARY 13, 2009
                      _____________________________ THOMAS K. KAHN
                                                           CLERK
                     D. C. Docket No. 07-00333-CV-M-E


HENRIETTA DIXON,

                                                  Plaintiff-Appellant,
      versus

MICHAEL J. ASTRUE,
Commissioner of Social Security Administration,

                                                  Defendant-Appellee.

               _________________________________________

                  Appeal from the United States District Court
                      for the Middle District of Alabama
               _________________________________________

                             (February 13, 2009)


Before EDMONDSON, Chief Judge, PRYOR and ANDERSON, Circuit Judges.


PER CURIAM:
       Plaintiff-Appellant Henrietta Dixon appeals the district court’s order

affirming the denial by the Commissioner of Social Security (the “Commissioner”)

of Dixon’s applications for disability insurance benefits and supplemental security

income. After review, we vacate and remand for additional fact determinations.

       Our review of the Commissioner’s decision is limited to whether substantial

evidence supports the decision and whether the correct legal standards were

applied. Wilson v. Barnhart, 284 F.3d 1219, 1221 (11th Cir. 2002). “Substantial

evidence is more than a scintilla and is such relevant evidence as a reasonable

person would accept as adequate to support a conclusion.” Crawford v. Comm’r of

Soc. Sec., 363 F.3d 1155, 1158 (11th Cir. 2004). Under this limited standard of

review, we may not make fact-findings, re-weigh the evidence, or substitute our

judgment for that of the Administrative Law Judge (“ALJ”). Moore v. Barnhart,

405 F.3d 1208, 1211 (11th Cir. 2005).

       A person who applies for Social Security disability benefits must prove her

disability. See 20 C.F.R. § 404.1512.1 The Social Security Regulations outline a

five-step sequential evaluation process for determining whether a claimant is



  1
   Disability is the “inability to 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 of not less than 12 months.” 42 U.S.C.
§ 423(d)(1)(A).

                                                   2
disabled. 20 C.F.R. § 404.1520; Jones v. Apfel, 190 F.3d 1224, 1228 (11th Cir.

1999). In steps one and two, the claimant must show that she has not engaged in

substantial gainful activity; and she must prove a severe impairment or

combination of impairments. Jones, 190 F.3d at 1228. In step three, the

impairment is compared to listed impairments; if the impairment meets or equals a

listed impairment, disability is automatically established. Id. If step three’s

impairment listing does not establish disability, in step four the claimant must

show an inability to perform past relevant work. Id. If the claimant makes a

sufficient showing of inability to perform past relevant work, in step five the

Commissioner bears the burden of showing other available work that claimant is

able to perform. Id.

       Here, the ALJ concluded that Dixon met the first two steps in the evaluative

process but that her impairments did not meet or equal a listed impairment.2

About step four, the ALJ determined -- based on the residual function capacity

(“RFC”) assessed by an independent doctor ordered to examine Dixon, the

testimony of an impartial vocational expert (“VE”), and Dixon’s age, educational

background and work experience -- that she was capable of performing her past



   2
    The ALJ concluded that Dixon suffered from the following severe impairments: degenerative
joint disease, osteoarthritis, hepatitis C, obesity and hernia repair.

                                             3
relevant work as a cook’s helper and, therefore, was not disabled. The ALJ

described Dixon’s past relevant work as unskilled and of medium exertional level.

       In the district court, Dixon argued that the ALJ’s determination that she

could return to her past relevant work was in error because the RFC determination

did not allow for medium level work, as defined by the regulations. The

Commissioner conceded that the ALJ’s RFC determination did not allow Dixon to

return to her past relevant work or perform medium-level work but argued that the

error was harmless because substantial evidence supported the ALJ’s ultimate

decision that Dixon was not disabled: the VE testified that Dixon could do light or

sedentary work and that jobs existed in the national economy that she could

perform. The magistrate judge affirmed the ALJ’s decision, agreeing with the

Commissioner that the ALJ erred in finding that Dixon could return to her past

relevant work but that the error was harmless.3

       On appeal, Dixon repeats her argument that the ALJ’s determination that

she could return to her past relevant work was inconsistent with the RFC

determination. She also asserts that the ALJ’s failure to make findings required by

the regulations was not harmless error. The Commissioner argues -- for the first



   3
    The parties consented for the magistrate to conduct all of the proceedings, including the final
judgment. 28 U.S.C. § 636(c).

                                                4
time -- that Dixon can perform her past relevant work and that its prior concession

to the contrary was in error.

      Our review is limited to issues raised before the district court. See

Crawford, 363 F.3d at 1161. So, because the Commissioner conceded before the

district court that the ALJ erred in determining that Dixon could return to her past

relevant work and could perform medium-level work, we decline to address its

contrary position that Dixon can perform medium-level work. Id.; see also Ford

ex rel. Estate of Ford v. Garcia, 289 F.3d 1283, 1293-94 (11th Cir. 2002)

(explaining that “[i]t is a cardinal rule of appellate review that a party may not

challenge as error a ruling or other trial proceeding invited by that party”).

      We agree with the district court that the ALJ erred in determining that

Dixon could return to her past relevant work. The RFC determination stated that

Dixon could lift and carry 5 pounds constantly, 15 pounds frequently, and 25

pounds occasionally. But medium work, as defined by the regulations, involves

lifting no more than 50 pounds at a time with frequent lifting and carrying of

objects weighing up to 25 pounds. 20 C.F.R. §§ 404.1567(c), 416.967(c).

      If a claimant cannot return to her past relevant work, the Commissioner

must, at step 5 of the evaluative process, show that there is work that the claimant

can perform. Here, the ALJ made no step 5 findings. Although the ALJ

                                           5
questioned the VE about alternative jobs at different exertional levels, the ALJ did

not mention the VE testimony in its decision or state which of these jobs Dixon

may have been able to perform. It also is unclear whether the ALJ would have

consulted the Grids in making a step 5 determination. See 20 C.F.R. Pt. 404

Subpt. P, Ap. 2.4

       “While we may not supply a reasoned basis for [an] agency’s action that the

agency itself has not given, we will uphold a decision of less than ideal clarity if

the agency’s path may reasonably be discerned.” See Zahnd v. Sec’y, Dep’t of

Agric., 479 F.3d 767, 773 (11th Cir. 2007). We conclude that the ALJ’s path is

not reasonably discernible here. Given that we have no step 5 determination to

review and that we may not make factual determinations, we remand for the ALJ

to determine whether alternative jobs exist in the national economy that Dixon

could perform.5

       VACATED AND REMANDED.




  4
   The Grids are a series of matrices which correlate to a set of variables -- the claimant’s RFC, age,
education, background, and previous work experience -- and can be used, at step 5, to determine
whether claimant has the ability to adjust to other work in the national economy. On entry of these
variables into their appropriate matrix, a determination of disabled or not disabled is rendered.
  5
   Because we have no step 5 findings to review, we need not address Dixon’s appellate arguments
that she was disabled as a matter of law according to the Grids and that the VE’s testimony was false.

                                                  6
