MMIS: the state Medicaid system behind your provider number, claims, and payments

The MMIS is where a state processes its Medicaid claims: the place your enrollment record lives, your fee-for-service claims are priced and paid, and your remittance comes from. Federal rules in 42 CFR 433.111 describe it as the system that processes provider claims and does the other work needed to run and monitor the Medicaid program. Many states hire a private contractor, a Medicaid fiscal agent, to operate it. The steps of a ride claim are covered in our guide to billing Medicaid for rides.

Each state names its own. North Carolina calls NCTracks its “multi-payer Medicaid Management Information System.” Georgia’s is GAMMIS, and Gainwell Technologies is the fiscal agent for the state’s Department of Community Health. New York’s billing guidelines call eMedNY the name of the state’s Medicaid system.

The parts a ride company uses

A transportation company meets the MMIS at four points:

• Enrollment. The provider file, where your Medicaid provider number and payment details live. In Texas, TMHP, the contractor that processes certain Medical Transportation Program claims for the state, also enrolls the program’s demand response and TNC providers and registers its mileage-reimbursement drivers.
• Authorizations. In New York, the broker authorizes each trip, and the authorization carries an 11-digit number. That number goes on the claim, in the 837P’s loop 2300 REF segment under qualifier G1, and the claim is filed with eMedNY, New York’s Medicaid system.
• Claims and pricing. The system prices each claim by its date of service. In North Carolina’s fee-for-service program, the county’s prior authorization also carries the trip rate. So when the state reversed its 3 percent NEMT cut in December 2025, NCTracks had to correct the authorizations submitted from October 1 to December 16 at the lower rate before claims already filed against them could be reprocessed. Medicaid mass adjustments covers that reprocessing.
• Remittances. The payment and the explanation of each claim come from the same system, in the formats the remittance advice guide walks through.

Federal funding and the strings attached

Federal money covers most of the cost, so federal rules shape how the system works. The match is 90 percent for designing, building, or improving it, once CMS approves the state’s advance planning document, and 75 percent for running it (42 CFR 433.15). To qualify, the system must align with HIPAA’s privacy and security rules and its electronic transaction standards, the same standards behind the 837P claim and the 835 remittance.

The operating match comes with a condition providers notice. Within 45 days of paying claims, the system must send notices to all or a sample of the people who received services, listing the service, the provider’s name, the date, and the amount paid (42 CFR 433.116). A rider who gets one sees what Medicaid paid for the trip, and the notices exist so members can flag services they never received (42 CFR 455.20).

When the MMIS never sees your claim

If a capitated broker or plan pays you, the money comes from its own claims system. The state then receives the trip as an encounter record. CMS tells states to report encounters from NEMT prepaid ambulatory health plans with claim type 3, the managed care encounter. A broker that carries no risk and is paid trip by trip at state plan rates is left out of managed care reporting entirely. Encounter data explains what those records must contain.