Medicaid Ambulance Billing Guide

Medicaid is run by each state within federal rules, so there is no single Medicaid ambulance fee schedule, filing deadline, or authorization process. What stays consistent is the structure: states set payment rates and coverage rules, many beneficiaries are enrolled in managed care plans that add their own requirements, and non-emergency transportation often runs through separate brokers. Getting paid depends on knowing which rules apply to each patient’s specific plan.

Fee-for-service and managed care

A patient may be covered by the state’s fee-for-service Medicaid program or by a Medicaid managed care organization (MCO). Each MCO can have its own enrollment and credentialing process, claim submission requirements, prior authorization rules, and appeal procedures. An agency billing Medicaid in one state may need to be credentialed separately with several plans, and outdated credentialing is a common reason for rejected claims.

Emergency and non-emergency transports

• Emergency transports are generally covered when medically necessary, and prior authorization is typically not required, though documentation of medical necessity still is.
• Non-emergency ambulance transports often require prior authorization or physician certification, depending on the state and plan.
• Non-emergency medical transportation (NEMT) by wheelchair van or ambulatory vehicle is usually arranged and paid through a transportation broker, with trip-level authorization and verification. See our NEMT billing services.

Payment and balance billing

Each state sets its own Medicaid ambulance rates, which are often lower than Medicare’s. Providers that accept a Medicaid patient generally must accept Medicaid’s payment as payment in full, apart from any nominal cost sharing the state allows. Billing Medicaid patients for the difference is not permitted.

Patients with both Medicare and Medicaid

For patients enrolled in both programs, Medicare is billed first and Medicaid is billed second. Medicaid is the payer of last resort, so any other coverage, such as commercial insurance, auto insurance, or workers’ compensation, is also billed before Medicaid. Patients enrolled in the Qualified Medicare Beneficiary (QMB) program cannot be billed for Medicare deductibles or coinsurance.

Eligibility and retroactive coverage

Medicaid eligibility can change month to month, so verify coverage as close to the date of service as possible. Federal rules generally allow retroactive coverage for up to three months before a patient applies, although some states have changed this through waivers. A transport that looked like self-pay can sometimes be billed to Medicaid once coverage is approved.

Filing deadlines and appeals

Medicaid and MCO filing deadlines vary by state and plan and are often shorter than Medicare’s 12-month limit. Appeal processes and deadlines also vary. Track them by payer, not with a single rule for all Medicaid claims.

Supplemental payment programs

Some states offer supplemental Medicaid payment programs for publicly owned or operated ambulance providers, often called GEMT or a similar name. Eligibility, cost reporting, and payment rules vary by state. Fire departments and municipal EMS agencies should check whether their state has one; see our fire department EMS billing page.

Medicaid ambulance billing checklist

• Confirm whether the patient is in fee-for-service Medicaid or an MCO
• Keep credentialing current with every plan you bill
• Check prior authorization rules for non-emergency transports
• Bill Medicare and other coverage first for dual-eligible and multi-coverage patients
• Do not bill Medicaid or QMB patients beyond allowed cost sharing
• Track filing and appeal deadlines by state and plan
• Recheck eligibility on self-pay accounts for retroactive coverage

For how Medicare rules compare, see our Medicare ambulance billing guide. Our ambulance billing services track state and plan rules for every Medicaid claim.