MedicaidPrior AuthHigh impact
Medicaid to implement single Pharmacy Benefit Administrator for all pharmacy claims on July 1, 2024
Mississippi Medicaid (DOM)·MS·Prior Authorization
Effective date
Jul 1, 2024
We identified it
Jun 21, 2026
Summary
Mississippi Medicaid has implemented a single Pharmacy Benefit Administrator effective July 1, 2024, with updated prior authorization procedures. All pharmacy prior authorization requests must now be submitted through the MESA provider portal or by fax, with 24-hour determination notices and 72-hour emergency supply options available.
Action Required
Immediately: All providers prescribing to Mississippi Medicaid beneficiaries must update pharmacy prior authorization workflows. Use MESA provider portal (https://portal.MS-Medicaid-MESA.com/MS/Provider) as primary method for PA requests, or fax to 1-866-644-6147. Staff must complete both the Standardized One Page Pharmacy Prior Authorization Form and Criteria/Additional Documentation Form for all requests. Check Universal PDL before submitting PA requests to identify preferred alternatives. Contact Gainwell Technologies at 1-833-660-2402 for assistance. Incomplete requests will be rejected.