Industrial medical treatment rendered at Veteran Administration (VA) hospitals and facilities are exempt from reduction per the California Official Medical Fee Schedule and are reimbursable for the full value of the rates that the VA charges. The rates prescribed are federally set and do not need to conform to the requirements of Labor Code §§ 4603.2 nor 5307.1. The Secretary of the VA prescribes regulations for the purpose of determining reasonable charges for care or services. 38 U.S.C. § 1729(c)(2)(A). The charges are computed using formulae prescribed under existing regulations and are presumptively reasonable.