Massachusetts Massachusetts 2018 I.  Scope and Applicability A.  Who is subject to the state’s external review laws? All carriers. 958 CMR 3.001 HMOs? Yes. Insurers? Yes. Utilization review organizations? Yes. ACOs? Yes. PPOs? Yes. Third party administrators? Yes. B.  What exemptions are provided, if any? Self-insured entities are not subject to state-based external review laws.   […]

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