MedicaidAdministrativeHigh impact
National Provider Identifier (NPI) Implementation
Illinois Medicaid - HFS·IL·Provider Notice
Effective date
May 23, 2007
We identified it
Jun 21, 2026
Summary
All healthcare providers must obtain a National Provider Identifier (NPI) to replace existing provider numbers for billing purposes. Beginning May 23, 2007, all electronic and paper claim submissions will require an NPI, and claims without NPIs may be denied or delayed.
Action Required
By May 23, 2007: All providers must obtain an NPI from CMS at http://www.cms.hhs.gov/NationalProvIdentStand/. Request separate NPIs for each existing HFS provider number and for each designated payee. Include all legacy identifiers when applying. Report NPIs to HFS through their Web Based Application before billing with the NPI. Failure to obtain and use NPIs will result in claim denials and processing delays.