1. Short title This Act may be cited as the Medicaid Third Party Liability Act . 2. Medicaid third party liability (a) Clarification of definitions applicable to third party liability (1) In general Section 1902 of the Social Security Act ( 42 U.S.C. 1396a ) is amended by adding at the end the following new subsection: (nn) For purposes of subsection (a)(25) and section 1903(d)(2)(B), the term responsible third party means a health insurer (including a group health plan, as defined in section 607(1) of the Employee Retirement Income Security Act of 1974, a self-insured plan, a fully-insured plan , a service benefit plan, a managed care organization, a pharmacy benefit manager, and any other health plan determined appropriate by the Secretary), the TRICARE program under chapter 55 of title 10, United States Code, an accountable care organization, or any other party that is, by statute, contract, or agreement, legally responsible for payment of a claim for a health care item or service. . (2) Conforming amendments Section 1902(a)(25) of the Social Security Act ( 42 U.S.C. 1396a(a)(25) ) is amended— (A) in subparagraph (A), in the matter preceding clause (i), by striking third parties and all that follows through item or service) and inserting responsible third parties ; (B) in subparagraph (G), by striking health insurer and all that follows through item or service) and inserting responsible third party ; (C) in subparagraph (I), in the matter preceding clause (i), by striking health insurers and all that follows through item or service and inserting responsible third parties