42 CFR 457.515 - Co-payments, coinsurance, deductibles, or similar cost-sharing charges: State plan requirements.
To impose copayments, coinsurance, deductibles or similar charges on enrollees, the State plan must describe -
(a) The service for which the charge is imposed;
(b) The amount of the charge;
(c) The group or groups of enrollees that may be subject to the cost-sharing charge;
(f) An assurance that enrollees will not be held liable for cost-sharing amounts for emergency services that are provided at a facility that does not participate in the enrollee's managed care network beyond the copayment amounts specified in the State plan for emergency services as defined in § 457.10.