38 U.S.C. § 5125

For purposes of establishing any claim for benefits under chapter 11 or 15 of this title, a report of a medical examination administered by a private physician that is provided by a claimant in support of a claim for benefits under that chapter may be accepted without a requirement for confirmation by an examination by a physician employed by the Veterans Health Administration if the report is sufficiently complete to be adequate for the purpose of adjudicating such claim.