United States Court of Appeals
                           FOR THE EIGHTH CIRCUIT
                                   ___________

                                   No. 04-2530
                                   ___________

Judith Douglas,                      *
                                     *
            Appellant,               * Appeal from the United States
                                     * District Court for the
      v.                             * District of South Dakota.
                                     *
Jo Anne B. Barnhart, Commissioner of * [UNPUBLISHED]
Social Security,                     *
                                     *
            Appellee.                *
                               ___________

                             Submitted: March 4, 2005
                                Filed: March 16, 2005
                                 ___________

Before BYE, RILEY, and COLLOTON, Circuit Judges.
                            ___________

PER CURIAM.

       Judith Douglas appeals the district court’s1 order affirming the denial of
disability insurance benefits. In her May 2001 application and subsequent
documents, Douglas alleged disability since April 2000 from depression and from
limitations following two back surgeries. In January 2003 an administrative law
judge (ALJ) determined that (1) Douglas had engaged in substantial gainful activity
(SGA) as a customer-service representative from November 27, 2001, to November

      1
       The Honorable Richard H. Battey, United States District Judge for the District
of South Dakota.
1, 2002; (2) her depression, anxiety, and chronic back pain were severe, but not of
listing-level severity alone or combined; (3) her subjective complaints were not
entirely credible; (4) she retained the residual functional capacity (RFC) to perform
sedentary and light work with certain mental limitations2; (5) she could perform her
past relevant work as a customer-service representative, a skilled sedentary job; and
(6) based on transferrable skills and the Medical-Vocational Rules, she also could
perform other jobs, including unskilled sedentary work as an addresser.3 The Appeals
Council denied review, finding new evidence Douglas offered after the ALJ’s
decision not material, and the district court affirmed. See Cunningham v. Apfel, 

, 500 (8th Cir. 2000) (standard of review).

      Douglas does not dispute that her part-time work from November 2001 to
November 2002 constituted SGA. See 20 C.F.R. 404.1574 (2004). Nevertheless, she
argues that the ALJ erred by ignoring her written request to consider that work as an
allowable trial-work period of nine months under 20 C.F.R. § 404.1592 (2004),
followed by a reentitlement period under 20 C.F.R. § 404.1592a (2004). Douglas’s
argument as to her eligibility for a trial-work period is foreclosed by Barnhart v.
Walton, 

, 222-25 (2002); and because she was ineligible for a trial-work
period, she necessarily was ineligible for a reentitlement period, see 20 C.F.R.
§ 404.1592a(c)(2) (2004).

      We also reject Douglas’s challenges to the ALJ’s credibility findings. In
finding Douglas’s subjective complaints not entirely credible, the ALJ listed the
requisite credibility factors announced in Polaski v. Heckler, 

, 1322
(8th Cir. 1984), and articulated multiple valid reasons for discrediting Douglas.


      2
       Douglas’s mental RFC is not at issue on appeal.
      3
       At a hearing, a vocational expert classified Douglas’s past jobs, identified her
transferrable skills, and testified that pursuant to the ALJ’s RFC findings, Douglas
could perform her past customer-service job, and also could work as an addresser.

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Contrary to Douglas’s assertion on appeal, there is precedent in this circuit for
considering part-time work, and the type of daily activities Douglas reported, as
reasons for discounting allegations of disabling pain. See Harris v. Barnhart, 

, 930 (8th Cir. 2004) (part-time work); Melton v. Apfel, 

, 941
(8th Cir. 1999) (same); Hutton v. Apfel, 

, 654-55 (8th Cir. 1999) (daily
activities). Douglas takes issue with the ALJ’s reliance on a 2002 functional-
capacity-evaluation report, but evidence from other sources such as physical
therapists may be used to show the severity of impairments and how they affect a
claimant’s ability to work, see 20 C.F.R. § 404.1513(d) (2004); and further, the report
was based on extensive objective tests and was reviewed by pain specialist Steven
Frost, who for the most part agreed with it. Douglas also argues that the ALJ
improperly relied on the lack of objective medical evidence. The record before the
ALJ showed Douglas underwent multiple invasive pain-control procedures, and
records submitted to the Appeals Council--showing additional surgical procedures
in December 2002 and February 2003--could provide an objective medical basis for
Douglas’s persistent reports of back pain. Based on the record as a whole, however,
we cannot say that this material requires the conclusion that Douglas’s pain was
disabling during the relevant period, especially because Douglas engaged in SGA,
even though only part-time, for almost a year from November 2001 to November
2002. See Guilliams v. Barnhart, 

, 801 (8th Cir. 2005) (even if
inconsistent conclusions may be drawn from evidence, agency’s decision will be
upheld if it is supported by substantial evidence on record as whole; deference to
ALJ’s credibility determination is warranted if the determination is supported by good
reasons and substantial evidence).

       Douglas’s challenges to the ALJ’s physical RFC findings also fail. We
disagree with her suggestion that pain specialist Steven Frost unequivocally opined
that she was unable to work full-time. Dr. Frost based his opinion, in part, on how
Douglas “related to pain,” and further stated that he found it difficult to correlate the
physical findings with Douglas’s mental perception of her pain, and that he believed

                                          -3-
Douglas was not malingering, but he thought she was overstating her symptoms.
Also, although Dr. Frost assessed low back pain on palpation and exacerbation of
pain with straight leg raises around the time he made his statements about part-time
work, it appears his findings were based on Douglas’s reports. The ALJ thus did not
err in discounting Dr. Frost’s opinion. See Pearsall v. Massanari, 

,
1219 (8th Cir. 2001) (it is ALJ’s function to resolve conflicts among opinions of
various treating and examining physicians; ALJ may reject conclusions of any
medical expert if they are inconsistent with record as whole). We agree with Douglas
that rehabilitation specialist Mark Simonson’s opinion about the need for a sit-stand
option is entitled to deference, as it was supported by his review of a 2001 functional-
capacity-evaluation report, and by the opinions of two other specialists. See Ellis v.
Barnhart, 

, 995 (8th Cir. 2005) (treating physician’s opinion is due
controlling weight if it is well supported by medically acceptable clinical and
diagnostic techniques and is not inconsistent with other substantial evidence in
record). Nevertheless, the ALJ’s failure to include such an option in his RFC findings
is not a basis for reversal: the ALJ found Douglas capable of performing her past
relevant work as a customer-service representative, and this was work that Douglas
herself described as including a sit-stand option. See Moad v. Massanari, 

, 891 (8th Cir. 2001) (claimant was not disabled if she could perform actual
functional demands and duties of specific past relevant job). And because the ALJ
found Douglas capable of performing her past relevant work, the burden never shifted
to the Commissioner to identify other jobs Douglas could perform. See Banks v.
Massanari, 

, 827 (8th Cir. 2001).

      Accordingly, we affirm.
                     ______________________________




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