Mich. Comp. Laws § 500.3406n

Sec. 3406n. (1) An insurer that delivers, issues for delivery, or renews in this state a health insurance policy that requires an insured to designate a participating primary care provider and provides for dependent care coverage shall permit a dependent minor insured to select and access a pediatrician for general pediatric care services. (2) An insurer shall not require prior authorization or referral for access under subsection (1) to a pediatrician who participates with the insurer. An insurer may require prior authorization or referral for access to a nonparticipating pediatrician.