Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.3406w

(a) Provide coverage for an emergency refill of up to a 60-day supply of any covered maintenance prescription drug.

(b) Provide coverage for an early refill of any 30-day or 60-day covered maintenance prescription drug to allow for up to a 90-day supply, without regard to whether the pharmacy is mail order or in person.

(a) “Emergency refill” means a refill where, in the pharmacist's professional judgment, failure to refill the prescription may interrupt the patient's ongoing care and have a significant adverse effect on the patient's well-being as provided in section 17713 of the public health code, 1978 PA 368, MCL 333.17713.

(b) “Maintenance prescription drug” means a prescription drug that meets the requirements under section 3406t(1)(b)(i) to (iii). 1