42 CFR § 425.102 - Eligible providers and suppliers.
(1) ACO professionals in group practice arrangements.
(2) Networks of individual practices of ACO professionals.
(3) Partnerships or joint venture arrangements between hospitals and ACO professionals.
(4) Hospitals employing ACO professionals.
(b) Other ACO participants that are not identified in paragraph (a) of this section are eligible to participate through an ACO formed by one or more of the ACO participants identified in paragraph (a) of this section.