MMP 26-46: Updates to Coverage of Maternity Care Services
Effective January 1, 2027, Michigan Medicaid transitions from global maternity CPT codes (59400, 59510, 59620, 59425, 59426, 59430) to separate encounter-based E/M and obstetric procedure codes. Providers must append modifier TH and appropriate ICD-10-CM diagnosis codes to routine antepartum and postpartum E/M claims to qualify for enhanced reimbursement. Claims submitted with global codes on/after January 1, 2027 will only be paid if all service dates occurred by December 31, 2026.