Mich. Comp. Laws § 600.2912: Actions for malpractice; member of state licensed profession.

Sec. 2912.

A civil action for malpractice may be maintained against any person professing or holding himself out to be a member of a state licensed profession. The rules of the common law applicable to actions against members of a state licensed profession, for malpractice, are applicable against any person who holds himself out to be a member of a state licensed profession.

Malpractice may be given in evidence in defense to any action for services rendered by the member of a state licensed profession, or person holding himself out to be a member of a state licensed profession.