Michigan Compiled Laws-Chapter 500. Insurance Code of 1956-Chapter 34. Disability Insurance Policies

An insurer that delivers, issues for delivery, or renews in this state a health insurance policy shall establish and maintain a provider network that, at a minimum, satisfies any network adequacy requirements imposed by the director under federal law.

See https://www.legislature.mi.gov/(S(fnpfwk0pfv0ntsyukddkvddu))/mileg.aspx?page=getObject&objectName=mcl-500-3428