Fee Schedule of the Department of Veterans Affairs will be followed, except for when another payment agreement, including a contract or provider agreement, is in place. (C) With respect to furnishing care or services under this section in a State with an All-Payer Model Agreement under the Social Security Act that became effective on or after January 1, 2014, the Medicare payment rates under paragraph (2)(B) shall be calculated based on the payment rates under such agreement, or any such successor agreement. (D) With respect to furnishing care or services under this section in a location in which the Secretary determines that adjusting the rate paid by the United States as described in paragraph (2)(B) is appropriate, the Secretary may negotiate such an adjusted rate. (E) With respect to furnishing care or services under this section in a location or in a situation in which an exception to the rates paid by the United States under the Medicare Program under title XVIII of the Social Security Act ( 42 U.S.C. 1395 et seq.) for the same care or services applies, the Secretary may follow such exception. (F) With respect to furnishing care or services under this section for care or services not covered under the Medicare Program under title XVIII of the Social Security Act ( 42 U.S.C. 1395 et seq.), the Secretary shall establish a schedule of fees for such care or services. (G) With respect to furnishing care or services under this section pursuant to an agreement with a tribal or Federal entity, the Secretary may negotiate a rate that is more than the rate paid by the United States as described in paragraph (2)(B). (4) For the furnishing of care or services pursuant to a contract or agreement under paragraph (1), a network provider may not collect any amount that is greater than the rate negotiated pursuant to paragraph (2)(A). (5) (A) If, in the course of an episode of care under this section, any part of care or services is furnished by a medical provider who is not a network provider, the Secretary may compensate