MedicaidAdministrativeHigh impact
National Provider Identifier (NPI) Reporting
Illinois Medicaid - HFS·IL · Psychiatry·Provider Notice
Effective date
Apr 1, 2011
We identified it
Jun 21, 2026
Summary
Community mental health providers must obtain unique National Provider Identifiers (NPIs) for each HFS provider number and 16-digit payee number to submit claims directly to HFS. Providers must report their NPIs to HFS before billing, as NPIs will be required for all claim submissions starting April 1, 2011.
Action Required
Before April 1, 2011: Community mental health providers must obtain unique NPIs for each HFS provider number and payee number, then fax the NPPES approval letter with provider contact information to 217-557-8800. Failure to report NPIs will result in claim rejections, processing delays, and payment denials.