MedicaidBilling CodesHigh impact
Maryland Medical Assistance Program ICD-10 Implementation Policy
Maryland Medicaid·MD·Provider Transmittal
We identified it
Jun 20, 2026
Summary
Maryland Medicaid has implemented ICD-10 diagnostic coding requirements. All providers billing Maryland Medicaid must use ICD-10 codes instead of ICD-9 codes for diagnosis coding on claims.
Action Required
Immediately: Billing team must update all systems to use ICD-10 diagnosis codes for Maryland Medicaid claims. Update billing software, encounter forms, and EMR templates to ensure ICD-10 codes are used instead of ICD-9 codes. Train staff on ICD-10 code selection. Claims submitted with ICD-9 codes will be rejected.