
495 F.3d 614 (2007)
Lisa COX, Appellant,
v.
Michael J. ASTRUE, Commissioner of Social Security, Appellee.
No. 06-3640.
United States Court of Appeals, Eighth Circuit.
Submitted: April 13, 2007.
Filed: July 26, 2007.
*615 Counsel who presented argument on behalf of the appellant was E. Gregory Wallace of Buies Creek, NC. Anthony W. Bartels of Jonesboro, AR, appeared on the brief.
Counsel who presented argument on behalf of the appellee was Carolyn Ann Ebbers, SSA, Dallas, TX. Virginia W. Keyes, Special AUSA of Dallas appeared on the brief.
Before WOLLMAN, BEAM, and COLLOTON, Circuit Judges.
WOLLMAN, Circuit Judge.
Lisa Cox appeals the district court's[1] order upholding the Social Security Commissioner's denial of her application for disability insurance benefits. Cox argues that as a result of procedural errors and ambiguous medical evidence, the administrative law judge's (ALJ) determination that she was not disabled was not premised on substantial evidence. We affirm.

I.
Cox contends that she has been qualified for disability benefits since December 11, 2002, because anxiety, mental retardation, and a respiratory impairment prevent her from working. At the time of the ALJ's decision, Cox was thirty-seven years old. According to her Social Security Administration disability form and testimony, she reported having received a tenth grade education and having attended special education classes. She attempted to receive a GED, but was unsuccessful. She also asserted that she had worked full time, on and off, as a certified nurse's aide (CNA) from 1994 to 1996, although she acknowledges that she never received special job training or attended a trade or vocational school, and had reported earnings averaging approximately $2000 a year during that period.
Cox has had a chronically tumultuous home life. She testified that she was molested by her father from the age of nine to sixteen, and as a result has difficulty concentrating, handling stress, and dealing *616 with people. She has three children, and she still lives with and takes care of her sixteen-year-old daughter, who suffers from severe mental impairments. She informed a psychiatrist that she had been married three times to abusive men, that she receives no child support from her children's father, and that she has had to care for various other family members.
In April 2002, Angela McKinness, an advanced practice nurse, diagnosed Cox with insomnia and generalized anxiety disorder. Nurse McKinness prescribed medication to help Cox with these issues. On May 8, 2003, Dr. Mary Ellen Ziolko performed a consultative psychological evaluation. Dr. Ziolko described Cox's affect and mood as depressed and anxious. An administration of the Wechsler Adult Intelligence Scale indicated that Cox had full scale, verbal, and performance IQ scores in the mid  to upper-sixties. These results were considered valid. Dr. Ziolko's summary report and diagnosis, however, made facially conflicting statements concerning Cox's status. Although she reported that Cox's intellectual functioning falls in the "mild" retardation range,[2] she also indicated in her evaluation of adaptive functioning that there "did not appear to be significant limitations in two or more areas of adaptive behavior. Adaptive behavior appeared more consistent with `borderline' intellectual functioning than mental retardation."
Cox was subsequently treated by Dr. Mohammed Al-Taher for her depression, anxiety, and insomnia. Dr. Al-Taher periodically adjusted Cox's medication in response to her needs. At various points, Dr. Al-Taher noted that the treatment appeared to be yielding positive results, but Cox's tumultuous family life and manipulative daughter often resulted in the return of depressive episodes. The record indicates that Dr. Al-Taher diagnosed Cox with mild depression and dependent personality traits. Cox testified that she suffers from anxiety attacks two to three times a week, does not have her anxiety and depression completely under control even with medication, and would cry if criticized in a work environment. She stated that she is routinely subject to crying spells and constantly thinks of her experience as a victim of molestation. Nevertheless, she acknowledged that she was not plagued by most of these problems when she worked as a CNA at a nursing home and her children were younger. She left that job in order to take care of her children.
After reviewing the entirety of the record, the ALJ found that although Cox's IQ scores were within the range of mild mental retardation, because of both her ability to perform a wide variety of daily activities and Dr. Ziolko's conclusion that her adaptive functioning was more consistent with borderline intellectual functioning, Cox did not have an impairment listed in, or medically equal to, those set forth in the Federal Regulations.[3] Furthermore, the ALJ found that her subjective complaints were not borne out by the record and were not fully credible. After the ALJ determined Cox's residual functional capacity (RFC), he posed hypotheticals to the vocational expert (VE) consistent with Cox's RFC. The VE indicated that an individual with Cox's RFC who can perform functionally light work could work as a bench assembler or small products assembler. *617 Accordingly, the ALJ concluded that Cox lacked a cognizable disability as defined in the Social Security Act.
On appeal, Cox contends that the ALJ erred by (1) not seeking clarification from Dr. Ziolko, whose report contradicted itself by indicating that Cox had mild retardation while simultaneously concluding that she had borderline intellectual functioning inconsistent with mild retardation; (2) failing to recontact Dr. Al-Taher and Nurse McKinness to determine how they believed her depression and anxiety affect her ability to work; and (3) asking the vocational expert hypothetical questions that did not include all of the relevant details of Cox's residual functional capacity, thereby rendering the answers unreliable.

II.
"It is not the role of this court to reweigh the evidence presented to the ALJ or to try the issue in this case de novo." Loving v. Dep't of Health & Human Servs., 16 F.3d 967, 969 (8th Cir. 1994). Instead, we review the ALJ's decision to determine whether it is supported by substantial evidence on the record as a whole. Id. "Substantial evidence is less than a preponderance, but enough that a reasonable mind might accept it as adequate to support a decision." Cox v. Apfel, 160 F.3d 1203, 1206-07 (8th Cir.1998). Our review extends beyond examining the record to find substantial evidence in support of the ALJ's decision; we also consider evidence in the record that fairly detracts from that decision. Id. at 1207. If, after conducting this review, we find that "`it is possible to draw two inconsistent positions from the evidence and one of those positions represents the [Secretary's] findings, we must affirm the decision' of the Secretary." Siemers v. Shalala, 47 F.3d 299, 301 (8th Cir.1995) (alteration in original) (quoting Robinson v. Sullivan, 956 F.2d 836, 838 (8th Cir.1992)).
The ALJ considered Cox's impairment by conducting the familiar five-step evaluation set forth in 20 C.F.R. § 404.1520(a)(g) (2004). Under the regulations, the ALJ determines: (1) whether the claimant is currently engaged in substantial gainful activity; (2) whether the claimant's impairments are so severe that they significantly limit the claimant's physical or mental ability to perform basic work activities; (3) whether the claimant has impairments that meet or equal a presumptively disabling impairment specified in the regulations; (4) whether the claimant's RFC is sufficient for her to perform her past work; and finally, if the claimant cannot perform her past work, the burden shifts to the Commissioner to prove that (5) there are other jobs in the national economy that the claimant can perform given the claimant's RFC, age, education and work experience. See Cox v. Apfel, 160 F.3d at 1207. Cox's claims of error relate to steps three and five.

A. Mental Retardation
The ALJ found that substantial evidence supported the conclusion that Cox's mental impairments did not meet or equal the listed requirements for mental retardation. We agree. For Cox's purposes, to qualify as presumptively disabled due to mental retardation, substantial evidence must support the presence of a "valid verbal, performance, or full scale IQ of 60 through 70" and "a physical or other mental impairment imposing an additional and significant work-related limitation of function," whose onset had occurred by age twenty-two. 20 C.F.R. Pt. 404, Subpt. P, App. 1, § 12.05(c); Maresh v. Barnhart, 438 F.3d 897, 899 (8th Cir.2006) (describing the § 12.05(c) requirements).
*618 Generally, social security hearings are non-adversarial. Snead v. Barnhart, 360 F.3d 834, 838 (8th Cir.2004). An ALJ bears a responsibility to "develop the record fairly and fully, independent of the claimant's burden to press his case." Id. Cox contends, then, that because Dr. Ziolko's medical report at least appeared to diagnose her with mental retardation, the ALJ should not have relied on contradictory language indicating that her adaptive function was more in line with borderline functioning than mental retardation to support its determination that Cox was not mentally retarded. Instead, the ALJ should have determined that Cox was mentally retarded or else consulted Dr. Ziolko for further clarification of the report's discrepancy. See Snead, 360 F.3d at 839 ("Because [the] evidence might have altered the outcome of the disability determination, the ALJ's failure to elicit it prejudiced [the claimant] in his pursuit of benefits.").
It is clear that Dr. Ziolko did not intend to ultimately diagnose Cox with mental retardation, however. The totality of the clinical record supports the ALJ's conclusion and was not ignored. Dr. Ziolko's report recounts Cox's ability to effectively communicate, her generally successful social relationships as exemplified by her relationships with her children, the many ways in which Cox has exhibited self-sufficient behavior, her lack of physical problems, and the lack of any limitations in her concentration, persistence, or pace. Each of these categories is a relevant adaptive functioning skill area. Dr. Ziolko concluded from these findings that Cox's adaptive behavior is more consistent with "borderline intellectual functioning" than mental retardation, and noted that there did not appear to be limitations in two or more areas of adaptive behavior  a medical prerequisite for the mental retardation classification.[4] Her discussion and conclusion, in fact, directly parallel the analytical considerations considered essential for the determination of mental retardation as enumerated in the American Psychiatric Association, Diagnostic and Statistical Manual of Mental Disorders 41 (4th ed. text revision 2000) (hereinafter "DSM-IV"), which states that "[t]he essential feature of Mental Retardation is significantly subaverage general intellectual functioning . . . accompanied by significant limitations in adaptive functioning in at least two [enumerated] skill areas. . . ."
In light of this direct, precise, and extensive discussion in Dr. Ziolko's report, which supports and culminates in an effective diagnosis of borderline intellectual functioning, we conclude that her remark indicating a contrary diagnosis of mild mental retardation was the result of inadvertence or imprecision. To hold otherwise would require the improbable conclusion that Dr. Ziolko had intended to offer a cursory diagnosis in direct contradiction to the careful findings and conclusions she thoroughly recounted and characterized on prior pages, and in direct contradiction to the defining diagnostic characteristics of mental retardation as identified by the DSM-IV that her analysis explicitly addressed. The ALJ's treatment of her report here, then, does not involve his substituting judicial conjecture for ambiguous medical opinion, but instead involves recognizing what amounts to an obvious medical opinion inopportunely attended by superficially distracting or misleading language. *619 In these circumstances, there is no need for further clarification. See 20 C.F.R. § 416.912(e) (2006) (requiring the recontacting of a treating physician only if evidence from that physician is inadequate to determine disability).
Taking into account the medical report and other evidence on the record concerning Cox's impairments, then, substantial evidence supports the ALJ's determination that Cox's impairments neither meet nor equal those limitations required for mental retardation. We reach this conclusion with full awareness of the very real difficulties Cox appears to experience. The difficulties are not sufficient to merit reversal, however, because "we will not reverse the decision even if substantial evidence also supports a different outcome." Stormo v. Barnhart, 377 F.3d 801, 805 (8th Cir.2004) (citing Fredrickson v. Barnhart, 359 F.3d 972, 976 (8th Cir.2004)). On balance, we consider the ALJ's determination to be supported by substantial evidence  particularly in light of the activities Cox acknowledged she could perform, not least of which was her assertion that she previously worked as a CNA, a semiskilled job, without experiencing difficulties for more than two years. Her counsel contends that given Cox's limited education, lack of specialized training, and marginal income from the CNA work, the job title she provides is "probably" little more than an attempt to put a positive spin on what amounts to a nurse's helper position. This is no more than speculation, however. We have not been made aware of any evidence on record controverting her assertion that she worked as a CNA.

B. The Residual Functional Capacity Determination
Cox next contends that the ALJ erroneously established Cox's RFC in the absence of any medical opinion by Nurse McKinness and Dr. Al-Taher directly addressing how her depression and anxiety affect her ability to work. As a result, Cox argues that the ALJ's RFC determination amounted to no more than a "layman's guess" at the work-related restrictions imposed by Cox's anxiety and depression. Cox's argument lacks merit because the medical evidence provided a sufficient basis on which her RFC was determined. The ALJ determined that Cox had the residual functional capacity to perform unskilled or semiskilled work and that Cox should have only superficial incidental contact with the public and co-workers, experience few changes in work setting, and perform only simple, routine, repetitive tasks involving no more than limited decision making.
Because a claimant's RFC is a medical question, an ALJ's assessment of it must be supported by some medical evidence of the claimant's ability to function in the workplace. Lauer v. Apfel, 245 F.3d 700, 704 (8th Cir.2001) (citing Nevland v. Apfel, 204 F.3d 853, 858 (8th Cir. 2000)). Accordingly, the regulations provide that treating physicians or psychologists will be recontacted by the Commissioner when the medical evidence received from them is inadequate to determine a claimant's disability. 20 C.F.R. § 416.912(e). Nevertheless, in evaluating a claimant's RFC, an ALJ is not limited to considering medical evidence exclusively. Lauer, 245 F.3d at 704; Dykes v. Apfel, 223 F.3d 865, 866 (8th Cir.2000) (per curiam) ("To the extent [claimant] is arguing that residual functional capacity may be proved only by medical evidence, we disagree."). Even though the RFC assessment draws from medical sources for support, it is ultimately an administrative determination reserved to the Commissioner. *620 20 C.F.R. §§ 416.927(e)(2), 416.946 (2006).
The ALJ's RFC determination with respect to the work-related effects of Cox's depression and anxiety was sufficiently supported by the medical evidence. The ALJ considered Dr. Al-Taher's examination in which Dr. Al-Taher assessed only a mild depressive disorder. Dr. Al-Taher indicated that Cox's depression was largely due to her chaotic lifestyle and family-life. The record also indicates that Dr. Al-Taher assigned Cox a Global Assessment of Functioning (GAF) score of sixty-five, which indicates that even though she suffers from some mild symptoms such as depressed mood and mild insomnia, or experiences some difficulty in social or occupational functioning, she generally functions reasonably well and is capable of having meaningful interpersonal relationships.[5] DMS-IV at 34. Furthermore, although Cox reported intermittent depressive symptoms (usually spurred by a family crisis), Dr. Al-Taher stated that they "partially improved fairly quickly." Despite Cox's ability to show some partial recovery from depressive episodes, Dr. Al-Taher acknowledged that some socially avoidant symptoms remain. Finally, the ALJ found to be significant Dr. Al-Taher's observation that during her treatment, Cox was capable of superficial social contact as evidenced by her ability to go Christmas shopping at a shopping mall for a five-hour period without difficulty despite her alleged inability to be around others and her proclivity to experience panic attacks. In light of these facts, observations, and medical conclusions which bear directly on the extent of Cox's ability to function in a work environment, Dr. Al-Taher's records persuade us that the ALJ's RFC assessment is supported by substantial medical evidence.[6]

C. The Hypothetical Questions
Finally, Cox contends that in step five of its analysis, the ALJ relied on the vocational expert's response to a hypothetical that did not include all of the limitations contained in the RFC. Testimony from a vocational expert is substantial evidence only when the testimony is based on a correctly phrased hypothetical question that captures the concrete consequences of a claimant's deficiencies. Porch v. Chater, 115 F.3d 567, 572 (8th Cir.1997) (citing Pickney v. Chater, 96 F.3d 294, 297 (8th Cir.1996)). Although the ALJ asked the vocational expert three hypotheticals, only the first and third have bearing on our *621 discussion of Cox's claim. The relevant language of each is as follows:
Assume . . . that this person has very limited reading and writing ability at the elementary level, and very basic math ability. Assume further . . . that this individual has a capacity for medium work, but with the following additional limitations, the individual is limited to simple, repetitive, routine tasks, with low stress to be defined as limited decision making required, and limited changes of the work setting, and that the individual can only have incidental contact with the public and coworkers. Could such an individual perform the relevant work of Ms. Cox?
. . . .
Assume, if you would, we have the same requirement for unskilled work that I discussed with the limited decision-making and only incidental contact with the public, but restricted to a light functional level. Would there be any employment for such an individual?
Tr. 280-81.
Cox alleges that the third hypothetical fails to incorporate all of the material in the first. Cox parses the language of the third hypothetical too finely, however, and does not appreciate the full relevance of its surrounding context. Cox does not contend that the first hypothetical fails to capture the concrete consequences of her deficiencies. Furthermore, our plain reading of the third hypothetical comports with the district court's understanding of it that is, one hearing it would assume from its language that it incorporates the same limitations described in the first hypothetical except for a change in the permissible exertion level from medium to light. Accordingly, because the vocational expert, in response to a hypothetical that captures the consequences of Cox's deficiencies, described readily available occupations in which she could engage, the Commissioner successfully demonstrated Cox's ability to perform work in the economy. See Reed v. Sullivan, 988 F.2d 812, 815-16 (8th Cir. 1993) (describing the burden).
The judgment is affirmed.
NOTES
[1]  The Honorable Henry L. Jones, Jr., United States Magistrate Judge for the Eastern District of Arkansas, to whom the case was referred for final disposition by consent of the parties pursuant to 28 U.S.C. § 636(c).
[2]  The mild retardation conclusion appears in the diagnosis section of the report.
[3]  Specifically, the ALJ noted that Cox's IQ scores are inconsistent with her ability to do the following: work as a nursing assistant for over two years, care for children, shop for groceries and clothes, pay bills, count change, cook, and drive.
[4]  We note that the medical standard for mental retardation is not identical to the legal standard. Maresh v. Barnhart, 438 F.3d 897, 899 (8th Cir.2006). Here, however, the medical definition is relevant for purposes of interpreting what was stated in a medical document.
[5]  For added context, we note that a GAF score in the fifties may be associated with a moderate impairment in occupational functioning, and a GAF score in the forties may be associated with a serious impairment in occupational functioning. American Psychiatric Association, Diagnostic and Statistical Manual of Mental Disorders 34 (4th ed. text revision 2000).
[6]  In support of her position, Cox cites a number of cases in which we reversed and remanded with instructions to make a new determination after further development of the record. The cases she cites, however, rely on inapposite fact patterns or are otherwise distinguishable. For example, in Bowman v. Barnhart, 310 F.3d 1080 (8th Cir.2002), we remanded because the doctor's "somewhat cursory" entries did not adequately assess how the claimant's impairments limited her work-related activities. Id. at 1084-85. Cox appears to believe that Bowman supports her contention that the absence of any explicit reference to "work" in close proximity to the description of her various medically evaluated limitations makes it impossible for the ALJ to ascertain her work-related limitations from that evaluation. It does not. Such explicit language is unnecessary here because Dr. Al-Taher's evaluations describe Cox's functional limitations with sufficient generalized clarity to allow for an understanding of how those limitations function in a work environment.
