Mich. Comp. Laws § 500.3559

Sec. 3559. (1) Subject to subsection (2), a health maintenance organization shall obtain a reinsurance contract or establish a plan of self-insurance as necessary to ensure solvency or to protect subscribers in the event of insolvency. A reinsurance contract must be with an insurer that is authorized or eligible to transact insurance in this state. (2) A health maintenance organization shall file a reinsurance contract or plan under subsection (1) for approval with the director within 30 days after the finalization of the contract or plan. A reinsurance contract or plan must clearly state all services to be received by the health maintenance organization. A reinsurance contract or plan is considered approved 30 days after it is filed with the director unless disapproved in writing by the director before the expiration of the 30 days. (3) A health maintenance organization shall maintain insurance coverage to protect the health maintenance organization that includes, at a minimum, fire, theft, fidelity, general liability, errors and omissions, director's and officer's liability coverage, and malpractice insurance. A health maintenance organization shall obtain the director's prior approval before self-insuring for these coverages.