MI HB4657

Adds "parent implemented model of intervention" as a covered treatment for autism spectrum disorders, defined as evidence-based practices where parents directly implement individualized interventions with their children in home or community settings through structured parent training programs.

Requires supervising health professionals to regularly review parent-implemented interventions in person or via 2-way real-time audiovisual technology to assess appropriate application, effectiveness, and continued medical necessity.

Includes parent-implemented model of intervention as part of the definition of "treatment of autism spectrum disorders" that must be covered by health insurers under existing autism insurance requirements.

Maintains existing coverage requirements including maximum annual benefits ($50,000 for ages 0-6; $40,000 for ages 7-12; $30,000 for ages 13-18) and permits standard insurance limitations like copays, deductibles, and utilization review.