Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.2912c

Sec. 2912c. (1) In an action alleging medical malpractice, a party named as a defendant in the action may, instead of answering or otherwise pleading, file with the court an affidavit certifying that he or she was not involved, either directly or indirectly, in the occurrence alleged in the action. Unless the affidavit is opposed pursuant to subsection (2), the court shall order the dismissal of the claim, without prejudice, against the affiant.

(2) Any party to the action may oppose the dismissal or move to vacate an order of dismissal and reinstate the party who filed the affidavit if it can be shown that the party filing the affidavit was involved in the occurrence alleged in the action. Reinstatement of a party to the action under this subdivision shall not be barred by any statute of limitations defense that was not valid at the time the action was originally commenced against the affiant. The opposing party may obtain discovery regarding the involvement or noninvolvement of the party filing the affidavit. The discovery shall be completed within 90 days after the date the affidavit is filed.