MedicaidBilling CodesHigh impact
MSA 20-01
Michigan Medicaid - MDHHS·MI·Provider Bulletin
Effective date
Jan 1, 2020
We identified it
Jun 20, 2026
Summary
Michigan Medicaid updated CPT and HCPCS codes effective January 1, 2020, adding new covered codes for various provider types including physicians, dental services, laboratory services, and therapy providers. Some codes require prior authorization (marked with *) and specific documentation requirements for dental codes.
Action Required
Immediately: Update billing system to include new 2020 HCPCS codes for Michigan Medicaid patients. Configure prior authorization requirements for codes marked with * (asterisk). Update therapy billing to include mandatory therapy modifiers (GN, GP, GO) for 'always therapy' services. Add tooth number/surface requirements for specified dental codes. Stop billing discontinued codes 58565 and A4264 after December 31, 2019. Verify provider type eligibility for each code category in your billing system.