MedicaidBilling CodesHigh impact
Maryland Medical Assistance Program ICD-10 Implementation Policy
Maryland Medicaid·MD·Provider Transmittal
We identified it
Jun 20, 2026
Summary
The Maryland Medical Assistance Program (Medicaid) has implemented ICD-10 coding requirements. All providers serving Maryland Medicaid patients must now use ICD-10 diagnosis codes instead of ICD-9 codes for claim submissions and prior authorizations.
Action Required
Immediately: Billing team must update all systems to use ICD-10 diagnosis codes for Maryland Medicaid claims. Stop using ICD-9 codes entirely. Update billing software, encounter forms, and prior authorization requests to support ICD-10 format. Train staff on ICD-10 code structure and crosswalks from ICD-9. Claims submitted with ICD-9 codes will be rejected.