How do I enroll as a Georgia Medicaid provider in GAMMIS, and what is revalidation?

Georgia Medicaid enrollment runs through the GAMMIS web portal (mmis.georgia.gov). The portal guide lists these steps:

1. Log in and open the Enrollment Wizard under Provider Enrollment.
2. Start a new Provider Enrollment Application.
3. Fill in each panel in order. Panels include provider specialty, address, licenses, disclosure of ownership, payee, insurance and work history.
4. Write down the Application Tracking Number (ATN) shown mid-way. You need it to check status.
5. Upload every required document. The submit button will not work until you do.
6. Accept the attestations and submit. Save the PDF copy.

You can check progress on the portal’s status page with your ATN and business name.

Revalidation: a May 25, 2026 alert on the portal said providers who had not revalidated would be suspended effective July 1, 2026, and claims for dates of service on or after that date would not be paid. A provider not revalidated within 30 days of a suspension notice would be terminated. It also said retroactive enrollment is not permitted.

If your account shows suspended, call the Provider Services Contact Center (1-800-766-4456) right away.