; (B) that contains substantially all of the required elements necessary for accurate adjudication, without requiring additional information from the network provider; and (C) in such a nationally recognized format as may be prescribed by the Secretary for purposes of paying claims for hospital care or medical services furnished under this section. (2) The term covered claimant means— (A) a network provider that submits a claim to the Secretary for purposes of payment by the Secretary of expenses for hospital care or medical services furnished under this section; or (B) a regional network operated by a contractor pursuant to subsection (a)(4)(B) that submits a claim to the Secretary for purposes of reimbursement for a payment made by the contractor to a network provider for hospital care or medical services furnished under this section. (3) The term covered payer means— (A) a regional network operated by a contractor pursuant to subsection (a)(4)(B) with respect to a claim made by a network provider to the contractor for purposes of payment by the contractor of expenses for hospital care or medical services furnished under this section; or (B) the Secretary with respect to— (i) a claim made by a network provider to the Secretary for purposes of payment by the Secretary of expenses for hospital care or medical services furnished under this section; and (ii) a claim made by a regional network operated by a contractor pursuant to subsection (a)(4)(B) for purposes of reimbursement for a payment described by subparagraph (A). (4) The term eligible veteran means a veteran who— (A) is enrolled in the patient enrollment system of the Department established and operated under section 1705(a) of this title; and (B) has— (i) been furnished hospital care or medical services at or through a Department facility on at least one occasion during the two-year period preceding the date of the determination of eligibility