This subchapter does not apply to an issuer or provider of health benefits under or a pharmacy benefit manager administering pharmacy benefits under:
(1) the state Medicaid program;
(2) the federal Medicare program;
(3) the state child health plan or health benefits plan for children under Chapter 62 or 63, Health and Safety Code;
(4) the TRICARE military health system;
(5) a workers’ compensation insurance policy or other form of providing medical benefits under Title 5, Labor Code; or
(6) a self-funded health benefit plan as defined by the Employee Retirement Income Security Act of 1974 (29 U.S.C. § 1001 et seq.).