MedicaidBilling CodesHigh impact
HIPAA Readiness
Illinois Medicaid - HFS·IL·Provider Notice
Effective date
Oct 16, 2003
We identified it
Jun 21, 2026
Summary
Illinois Medicaid is implementing HIPAA compliance changes in two phases: October 16, 2003 requires switching from ICD-9 procedure codes to HCPCS/CPT for outpatient billing and eliminating 8-digit drug codes in favor of HCPCS codes. January 1, 2004 will require National Drug Codes (NDC) to supplement HCPCS drug codes for electronic claims.
Action Required
HISTORICAL POLICY - This 2003 policy is already implemented. No current action required as this predates modern billing practices by over 20 years. All mentioned changes (ICD-9 to HCPCS/CPT conversion, NDC requirements) are standard practice today.