Billing NEMT mileage correctly: loaded miles, shortest-route rules, and GPS records

Five steps between the odometer and the claim

A mileage figure on a NEMT claim starts as a reading in the van and ends as billed units that a payer can check against a map, a clock, and GPS data. It passes through five steps, each with rules that change from payer to payer:

1. Record the leg while it happens.
2. Keep only the loaded miles.
3. Apply the payer’s route standard.
4. Convert the miles into billable units.
5. Put the units on the right claim line.

Most mileage cuts trace back to one of these steps. The sections below take them in order, then cover the checks payers run afterward.

Step 1: Record the leg while it happens

A number written down later is an estimate, and payers treat it as one. MediTrans names incorrect mileage as a common claim problem in Louisiana and tells providers to use actual odometer readings instead of estimates. For every leg, capture:

• Odometer readings at pickup and drop-off, or the GPS distance for the leg. Minnesota requires both readings on the trip record, along with the driver’s signed statement that the record shows the actual miles driven.
• Origin and destination addresses, plus the direct-route mileage where the payer measures by map. Minnesota also requires the method used to find that route.
• Pickup and drop-off times, so a reviewer can compare miles with minutes.
• GPS trip data where the program requires it. New York’s GPS rule, in force since April 3, 2023, requires every trip’s start point, end point, and points in between to go to the broker.
• Any detour and the reason for it, written that same day.

Minnesota can recover payments for trips that lack the required documentation. New York’s enrolled providers agree to keep records for six years from when services were furnished. Vans without digital tracking can use a NEMT mileage log in the meantime.

Step 2: Keep only the loaded miles

Medicaid pays for the distance a rider actually spends in the vehicle. New York’s policy manual defines loaded miles as the miles an enrollee occupies the vehicle and reimburses no others. The drive to the pickup, the return to the garage, and the empty ride away from a no-show are overhead.

CMS takes the same position. In SMD 23-006, its September 28, 2023 coverage guide for state Medicaid directors, CMS says mileage covered without a beneficiary aboard generally cannot be paid, either as a direct service or as an administrative activity. It lists the driver’s return after a no-show among those miles. States may build those costs into their payment methodology. The guide also added a narrow option: a state can pay for unloaded miles when the most appropriate and economical provider would face extraordinary, prohibitive costs to reach the rider, but only after submitting a state plan amendment.

Ohio’s transportation rule (OAC 5160-15-26) turns the principle into specific limits:

• No payment for a transport with no Medicaid-eligible person in the vehicle.
• The drive out to a pickup and the drive away from a drop-off count as part of the transport itself. Ohio pays nothing extra for them, and the rider cannot be charged.
• Extra miles from an unnecessarily indirect route are not covered.

Ohio also protects providers in one situation. When a medical appointment is canceled after the rider is already on the way, and nobody told the provider, Ohio pays the transport and the actual loaded miles. The provider first gets a signed statement from the medical office explaining the cancellation, then marks the claim as a canceled service.

Unloaded miles still cost money. Deadhead miles covers how to account for them, and the trip price calculator shows their effect on a trip’s margin.

Step 3: Apply the payer’s route standard

Payers agree on loaded miles and part ways on how to measure them.

• The map decides. Colorado pays the shortest trip length returned by an internet map, trip planner, or GPS. Extra distance the van actually drove does not raise the payment.
• The efficient route decides, with odometer proof allowed. Indiana holds providers to the shortest efficient route, and the driver’s ticket can show the distance from the odometer or from a mapping program. Minnesota requires the most direct route and wants the odometer readings, the direct-route mileage, and the measuring method on the record.
• The road decides. Ohio pays the distance actually traveled and refuses only the extra miles from an unnecessarily indirect route.

Here is how a detour plays out, as an example. A leg logs 13.4 loaded miles on the odometer because a bridge was closed, while the shortest mapped route is 12.1 miles. Under Colorado’s standard, the claim starts from 12.1. Ohio can pay 13.4, because a closed bridge is not an unnecessary detour, as long as the reason is on the record. In Indiana and Minnesota, which measure against the efficient or direct route, the same-day note about the closure is what supports the longer figure.

Step 4: Convert miles into billable units

Precision, starting points, caps, and approval limits all change the number that reaches the claim.

Precision

New York bills tenths. For trips on or after August 1, 2019, loaded miles are reported to one decimal place, with a zero before the decimal point for trips under a mile (0.9). Pushing a figure up to the next whole number is prohibited, and the state warns that inflated claims of that kind can be treated as fraud, with recoveries and penalties to follow. A provider whose software cannot handle decimals may round down to the lower whole number until the state withdraws that allowance.

Indiana bills whole miles, rounded to the nearest. Anything from 15.0 to 15.4 miles becomes 15 units, and 15.5 to 16.0 becomes 16. So a 12.5-mile leg is billed as 12.5 in New York and as 13 in Indiana.

Because one leg bills differently for each payer, rounding belongs in each payer’s settings. A blanket round-up adds distance that was never driven to every claim it touches.

Where payment starts, pauses, stops, or needs approval

• Starts. Indiana’s van mileage, ambulatory or wheelchair, pays only once a one-way trip passes 10 miles. The state subtracts the first 10 miles itself, so providers still bill every mile. Mileage billed on a shorter trip comes back as a denied line.
• Pauses for review. Colorado suspends any NEMT mileage line above 52 units, or 125 for riders who live in designated rural counties, and denies it without an attachment that meets its requirements. A trip over 25 miles one way also needs the state’s verification form, completed by the rider’s treating or referring provider.
• Stops. Ohio limits mileage payment on a non-emergency wheelchair van or ground ambulance trip to 50 miles from the pickup, unless the provider keeps documentation that justifies the distance. Trips to or from a place outside Ohio and its neighboring states go to manual review.
• Needs approval. Minnesota caps trips at 30 miles for primary care and 60 miles for specialty care unless the rider has authorization. That authorization moved from the local agency to the program’s administrator on July 1, 2026 for fee-for-service, and moves on January 1, 2027 for managed care. In Georgia, brokers must provide rides to care within 30 miles in urban areas and 50 miles in rural areas without a referral. Longer trips need a physician’s statement that care is not available locally, or a provider referral.

Step 5: Put the units on the right line

Mileage goes on its own claim line, one unit per mile, under a per-mile code that depends on the program and the vehicle:

Indiana also wants all of a member’s transportation on one date billed on a single claim. On paper claims, NUCC’s box 24G guidance permits a decimal for a partial unit, which matters only where the payer accepts fractional miles. NEMT billing codes lists codes for more programs.

Shared rides decide which claim carries the miles:

• New York pays the real distance of the combined run, once, on the claim of the rider picked up first. In its manual’s example, that rider is billed the base fee plus 13 miles, and a second rider on the same route is billed only the base fee, because that rider’s 7 miles are already covered.
• Indiana pays mileage and waiting time on the first member’s claim. Each additional member going from the same county to the same vicinity earns half the base rate and no miles.
• Ohio requires the loaded miles for the shared portion to be allocated in a reasonable, consistent way.

The checks payers run on billed miles

Mileage is easy to test against other data, and payers do.

A cut mileage line is either a documentation problem or a billing problem. If the leg record supports the miles, give the payer what it lacked through a corrected claim or an appeal. If the record does not support them, correct the claim and return the difference.

Recording miles while the van moves

HealthRide records each trip’s GPS route on its own, and the GPS miles land on every leg’s record and in exports. With one click, the live map lays the planned route beside the path the driver took, and the trip log downloads as a spreadsheet or PDF whenever a payer wants to see where a mileage number came from.