GEMT stands for Ground Emergency Medical Transportation. In practice, it’s a Medicaid program — operated by each participating state — that returns supplemental payments to publicly owned or operated ambulance services for the emergency ground transports they provide to Medicaid patients.

The reason GEMT exists is straightforward. Medicaid’s base payment for an emergency ground transport, plus the per-mile rate, almost never covers the real cost of putting an ambulance on the road for that call. The gap can be substantial — especially for rural and volunteer services. GEMT is the federal-state mechanism for closing some of that gap.

How GEMT works, in three steps

  1. A qualifying ambulance service completes a detailed annual cost report showing what each emergency ground transport actually costs. The cost report includes direct labor, vehicle costs, equipment depreciation, allocated overhead, and indirect costs (using a federally compliant indirect cost rate).

  2. The state Medicaid agency reviews the cost report and calculates an average cost per transport. From that, it determines a supplemental payment amount per Medicaid transport — essentially, cost minus what Medicaid already paid (base + mileage) and minus any other reimbursement received.

  3. The supplemental payment is paid prospectively over the following state fiscal year, then reconciled against actual transport volume.

Who qualifies in Iowa

Iowa’s GEMT program is available to ambulance services that:

  • Provide emergency ground transports to Iowa Medicaid members
  • Are enrolled as Iowa Medicaid providers for the period being claimed
  • Are publicly owned or publicly operated — cities, counties, townships, hospital districts

Private and for-profit services do not qualify under Iowa’s current program.

What’s the catch

Two things. First, participation is voluntary but requires real work: the annual cost report is a detailed document with multiple schedules, an established indirect cost rate, and a certification requirement. Second, there’s a deadline. Iowa’s cost report is due to Iowa Medicaid by November 30 each year. Miss it, and you forfeit the next fiscal year’s supplemental payments.

Is GEMT worth it?

For most qualifying services in Iowa, yes — often by a wide margin. A single year’s supplemental payments will typically exceed the cost of bringing in outside help to do the report correctly. The bigger question is usually whether to do it in-house — consuming finance and admin staff time during the fall budget season — or to engage a consultant.

For background on the federal framework, see the CMS informational bulletin on applicable federal cost principles for GEMT. For Iowa specifics, the Iowa HHS GEMT program page is the canonical reference.