section 2730(b), section 717(b) of the Employee Retirement Income Security Act of 1974, or section 9817(b) of the Internal Revenue Code of 1986 (as applicable) and the enrollee pays such bill, the provider shall reimburse the enrollee for the full amount paid by the enrollee in excess of the in-network cost-sharing amount for the treatment or services involved, plus interest, at an interest rate determined by the Secretary. (c) Limitation Nothing in this section shall prohibit a provider from requiring in the terms of a contract, or contract termination, with a group health plan or health insurance issuer— (1) that the plan or issuer remove, at the time of termination of such contract, the provider from a directory of the plan or issuer described in section 2730(a)(1), section 717(a)(1) of the Employee Retirement Income Security Act of 1974, or section 9817(a)(1) of the Internal Revenue Code of 1986 (as applicable)