and prevention and public health activities. (4) Enrollee choice Nothing in this Act shall preclude individuals enrolled in the Federal Employees Health Benefits Program or TRICARE or individuals receiving benefits provided under title, 38, United States Code or the Indian Health Service from enrolling in Medicare for America. Enrollees shall be entitled to the employer contribution as established under section 126(c) of such Act. (c) Sunset of provisions related to the State exchanges Effective January 1, 2022, the Federal and State Exchanges established pursuant to title I of the Patient Protection and Affordable Care Act ( Public Law 111–148 ) shall terminate, and any other provision of law that relies upon participation in or enrollment through such an Exchange, including such provisions of the Internal Revenue Code of 1986, shall cease to have force or effect. (d) Severability Every provision in this Act and every application of the provisions in this Act are severable from each other as a matter of Federal law. If any application of any provision in this Act to any person or group of persons or circumstances is found by a court to be invalid, the remainder of this Act and the application of the Act’s provisions to all other persons and circumstances may not be affected. C Targeted Reforms 121. No surprise billing (a) Surprise bill defined For purposes of this section the term surprise bill — (1) means a bill for health care services, other than emergency services, received by an insured for services rendered by an out-of-network health care provider, where such services were rendered by such out-of-network provider at an in-network facility, during a service or procedure performed by an in-network provider or during a service or procedure previously approved or authorized by the health carrier and the insured did not knowingly elect to obtain such services from such out-of-network provider