Mich. Comp. Laws § 500.3528

Sec. 3528. (1) A health maintenance organization shall establish written policies and procedures for credentialing verification of all health professionals with whom the health maintenance organization contracts. A health maintenance organization shall apply these standards consistently. This act does not require a health maintenance organization to select a provider as an affiliated provider solely because the provider meets the health maintenance organization's credentialing verification standards. This act does not prevent a health maintenance organization from using separate or additional criteria in selecting the health professionals with whom it contracts. (2) A health maintenance organization is considered to meet the requirements of this section if the health maintenance organization is accredited by a nationally recognized accredited body approved by the director. As used in this subsection, "nationally recognized accredited body" includes the National Committee for Quality Assurance.