NEMT Medicaid Billing in Illinois

Here is what trips up new Illinois fleets: there is no single payer and no single broker. Illinois runs a dual model. For fee-for-service members, HFS uses NETSPAP — its prior-approval vendor, run by Transdev — to authorize trips; NETSPAP does not pay, so you bill HFS directly through the state MMIS. For HealthChoice Illinois managed-care members, NEMT is carved into the MCO and you bill that plan's broker. The one thread that runs through the FFS side is the Request Tracking Number: every NETSPAP-authorized trip gets an RTN, and it has to be on the claim or HFS denies it. About 3.26 million Illinoisans are enrolled in Medicaid, with roughly 2.5 million in managed care, per KFF Medicaid state fact sheets (2025) — so most trips route to an MCO broker, not to HFS. This page walks the full cycle: capturing the RTN, choosing the right route, filing inside the window, working denials, and reconciling every remittance.

Before a trip can be billed, it has to be sorted to the right payer. Fee-for-service trips are authorized by NETSPAP and billed to HFS directly through the state MMIS — NETSPAP is the prior-approval vendor, not the payer. HealthChoice Illinois managed-care trips are different: NEMT is carved into the MCO, and each plan uses its own broker — Modivcare, First Transit, or MTM among the subcontractors — so the claim goes to that broker on its own rules, not to HFS and not with an HFS RTN. The exact plan-to-broker mapping shifts, so confirm which broker serves each member's plan rather than assuming. We check eligibility, identify FFS versus managed care, and route each trip to the correct channel so claims stop landing in the wrong system and denying.

The last mile is proving you were paid for every trip you ran, on both routes. HFS remittances for FFS trips and each broker's remittance for MCO trips all have to be matched to the trips you actually drove, so short-pays, missing claims, and silent denials surface instead of quietly disappearing. This is also where retention matters: the trip records, RTNs, and proof-of-transport that back each claim have to be kept and retrievable, because that is what an audit or an override request asks for. We reconcile every remittance against your trip records, keep the RTN tied to each paid trip, post payments, and chase the gaps — so your revenue matches your operation instead of trailing it.