MedicaidAdministrativeHigh impact
Health Care Providers Are Required to Report Their National Provider Identifier to Wisconsin Medicaid Immediately
Wisconsin Medicaid (ForwardHealth)·WI·Medical Policy
Effective date
May 23, 2008
We identified it
Jun 20, 2026
Summary
Wisconsin Medicaid requires all certified health care providers to immediately report their National Provider Identifier (NPI) in preparation for federal NPI implementation on May 23, 2008. Providers must continue using their current eight-digit provider numbers on claims until further notice, but failure to report NPI information may result in future claim denials or processing delays.
Action Required
Immediately: All Wisconsin providers who haven't already done so must report their NPI to Wisconsin Medicaid using one of three methods: complete the web application at dhfs.wisconsin.gov/medicaid/, email information to winpi@dhfs.state.wi.us (include 8-digit Medicaid ID, NPI, contact name and phone), or mail completed form HCF 13505. Continue using current 8-digit provider numbers on all claims and transactions until further notice. Retain NPI confirmation letter for verification. Failure to report NPI may result in claim denials or processing delays after May 23, 2008.