MESA Portal for Providers

The Mississippi Division of Medicaid’s transition to a new Fiscal Agent, effective Oct. 3, 2022, includes a new Medicaid Management Information System (MMIS) and provider portal known as MESA: Medicaid Enterprise System Assistance. The goal of MESA is to enhance connections between health services systems and improve access to health information for Medicaid providers and the members they serve.

Access to the new MESA web portal is required for submitting, adjusting, and correcting claims; to access, save, or print your Remittance Advice (RA); submitting and amending prior authorization (PA) and requests; and verifying member enrollment.

The information and links on this page are designed to help providers register in the new portal and begin using it efficiently.

Click the Provider Login button below to go to the MESA login screen, and follow the MESA Tips below to navigate the portal.

• Eligibility Resource Document

MESA Tips (Newly Added)

MESA Tip: Member Coverage Descriptions – Added 4/4/24

MESA Tip: Pharmacy Billing for Medication Therapy Management on a Professional Claim
– Added 1/12/24

MESA Tip: Add Program – Added 1/12/24

MESA Tip: Provider Revalidation – Added 10/27/23

MESA Tip: Provider Recredentialing – Added 10/13/23

MESA Tip: How to Partially Save a Recredentialing or Revalidation Application, and Identify and Resolve Errors

MESA Tip: Provider Portal Processes – Updated 3/13/24

MESA Tip: Provider Enrollment Application Needing Signatures of An Authorized Person

MESA Tip: Dental Claims Submission

MESA Tip: Long Term Care Claims Submission – Updated 7/24/23

MESA Tip: Home Health Claims Submission – Updated 7/24/23

MESA Tip: Pharmacy Claims Submission – Updated 7/24/23

MESA Tip: Provider Enrollment Panels – Updated 12/20/23

MESA Tip: Remittance Advice Financial Transaction Page – Provider Portal

MESA Tips

MESA Tip: Inpatient Claim Submission – Updated 7/24/23

MESA Tip: Inpatient Claim Submission – Updated 7/24/23

MESA Tip: TPL Claims Submission

MESA Tip: Treatment History Navigation and Search – Updated 8/31/23

MESA Tip: Professional Claim Submission – Updated 7/24/23

MESA Tip: TPID Linking for Outside Service – Updated 7/24/23

MESA Tip: TPID Linking for Self Service – Updated 7/24/23

MESA Tip: Delegate Accounts (Updated)

MESA Tip: Eligibility, Benefit Usage Verification and Retro Eligibility – Updated 9/19/23

MESA Tip: Professional Crossover Claim Submission – Updated 7/24/23

MESA Tip: Inpatient Crossover Claim Submission – Updated 7/24/23

MESA Tip: Outpatient Crossover Claim Submission – Updated 7/24/23

MESA Tip: Create A Newborn Enrollment in Provider Portal

MESA Tip: Submitting A Newborn Enrollment

MESA Tip: AVRS Quick Reference for Providers

MESA Tip: Delegate Accounts

MESA Tip: Eligibility Verification – Updated 3/13/24

MESA Tip: PA Letters – Updated 7/24/23

MESA Tip: PA Letter – Provider Portal Pharmacy Reports – Updated 7/24/23

MESA Tip: Universal PA Form Rules, Part 1

MESA Tip: Universal PA Form Rules, Part 2

MESA Tip: Trading Partner Enrollment – Updated 7/24/23

MESA Tip: DUR Override Codes Panel

MESA Provider Portal FAQs

Additional MESA Portal Resources

• Training Videos
• Scheduled Workshop Webinars
• Fee Schedules and Rates
• EDI Claims Companion Guides
• MESA Provider Billing Quick Tips – Printable PDF

Key Contacts

CHIP Providers

• All Mississippi providers enrolling as Medicaid providers and/or CHIP providers must enroll in the new MESA system.
• All providers enrolling as MississippiCAN and CHIP providers will be credentialed through the MESA system.
• All providers enrolling as MississippiCAN and CHIP providers must contact each Coordinated Care Organization (CCO) to contract with and enter their provider network.

Additional Provider Resources

• Paper Claims Billing Manual
• Fee Schedules and Rates
• The Mississippi Medicaid MMIS Replacement Project