Medicare Part B covers ground ambulance transportation when the trip is medically necessary and any other way of getting you there would endanger your health. After you meet the $283 Part B deductible in 2026, you pay 20 percent of the Medicare-approved amount and Medicare pays the rest.1CMS. 2026 Medicare Parts A and B Premiums and Deductibles Whether a given ride is covered turns on your condition at the time, and on whether the ambulance took you to the nearest facility that could treat you.
When a Ride Qualifies as Medically Necessary
The governing rule is at 42 CFR 410.40. For a non-emergency trip, the question is whether your condition makes travel by car, wheelchair van, or any other standard vehicle unsafe. Bed confinement is one factor Medicare looks at, but it is not the only one. Even if you can get out of bed, your medical condition on its own can justify an ambulance if other transport would put your health at risk.2eCFR. 42 CFR 410.40 – Coverage of Ambulance Services
To meet Medicare’s definition of bed-confined, all three of these must be true: you cannot get up from bed without help, you cannot walk, and you cannot sit in a chair or wheelchair.2eCFR. 42 CFR 410.40 – Coverage of Ambulance Services Being bed-confined does not by itself guarantee coverage; the ambulance provider still has to document that other transportation would be medically inappropriate. And if you are not bed-confined but you need monitoring during the ride, that fact alone can support coverage when it is documented.
Medicare also restricts where the ambulance can pick you up and drop you off. Covered pairs include home to a hospital, hospital to a skilled nursing facility, and hospital to hospital. The general rule is that Medicare pays only to the nearest facility that can treat your condition. Pick a hospital farther away for personal reasons and Medicare pays only what the trip to the closer facility would have cost; the difference is yours.3Medicare.gov. Medicare Coverage of Ambulance Services
Rides taken purely for convenience are never covered. That includes using an ambulance when you could have safely traveled by car or wheelchair van, and choosing a more distant hospital to be closer to family.3Medicare.gov. Medicare Coverage of Ambulance Services
What You Pay
Your share of a covered ground ambulance trip is 20 percent of the Medicare-approved amount, after the Part B deductible. In 2026 that deductible is $283.1CMS. 2026 Medicare Parts A and B Premiums and Deductibles Ambulance suppliers that participate in Medicare must accept the approved amount as payment in full. They cannot bill you more than the 20 percent coinsurance for a covered service.4Medicare.gov. Ambulance Services
If the ambulance company believes Medicare will not pay because the trip does not meet the medical necessity rules, they are required to give you an Advance Beneficiary Notice of Noncoverage, or ABN, before the ride. Signing the ABN is your agreement to pay out of pocket if Medicare denies the claim. If you refuse to sign, the company decides whether to transport you, and you could still be responsible for the full charge if Medicare does not cover it.3Medicare.gov. Medicare Coverage of Ambulance Services
One gap to know about: the federal No Surprises Act, which protects patients from balance billing by out-of-network air ambulance providers, does not cover ground ambulances. An out-of-network ground ambulance that answers a 911 call can bill a privately insured patient for amounts above what insurance pays, unless state law says otherwise.5Centers for Medicare & Medicaid Services. The No Surprises Act Prohibitions on Balance Billing For Medicare beneficiaries this exposure is limited, because participating ambulance suppliers have to accept the Medicare-approved amount as full payment.
Repeat Trips for Dialysis and Other Ongoing Care
Patients who need the ambulance regularly, for dialysis, wound care, or other recurring treatments, fall under Medicare’s rules for repetitive non-emergency transport. A pattern counts as repetitive if it involves three or more round trips within 10 days, or at least one round trip per week for three straight weeks.6Centers for Medicare & Medicaid Services. Repetitive Scheduled Non-Emergent Ambulance Transport Prior Authorization Model
Suppliers can bill the first three round trips without prior authorization. After that, they can either request prior authorization from the Medicare Administrative Contractor, or go without it and have every later claim reviewed before payment. When prior authorization is approved, it can cover up to 40 round trips over a 60-day window; anything beyond that needs a new authorization.6Centers for Medicare & Medicaid Services. Repetitive Scheduled Non-Emergent Ambulance Transport Prior Authorization Model
Repetitive transport also requires a Physician Certification Statement signed by your attending physician, with their credentials, dated within 60 days before the start of the trips. Supporting medical records have to come from your treating clinician rather than the ambulance company, and they need to explain both your condition and why ambulance transport is the only safe option.
If Medicare Denies the Claim
Watch for the Medicare Summary Notice or Explanation of Benefits after the ride. If the claim is denied, you have 120 calendar days from the day you receive the initial determination to request a redetermination. Medicare treats the notice as received five days after it was mailed, so the practical window is 125 days from the date on the notice.7eCFR. 42 CFR 405.942 – Time Frame for Filing a Request for a Redetermination A redetermination is your chance to submit records your doctor can provide, including the reasons ambulance transport was medically necessary. If the denial is upheld, further appeal levels are available, including reconsideration by a Qualified Independent Contractor and a hearing before an Administrative Law Judge.
There is also a filing deadline on the front end: ambulance claims must be submitted within one calendar year of the date of service, and Medicare denies late claims outright except in very limited circumstances.8eCFR. 42 CFR 424.44 – Time Limits for Filing Claims If you were transported and never see a claim appear on your Medicare account, follow up with the ambulance company before the year runs out.
What Medicare Looks For in the Record
Coverage decisions are driven by what the ambulance crew and your clinicians document. The run report should describe your condition at pickup, the care provided during transport, and diagnosis codes that match. Secondary codes like Z74.01 for bed confinement, or Z99.89 for dependence on enabling machines such as continuous IV fluids or active airway management, help support the level of service billed.9Novitas Solutions. Ground Ambulance Transports – Dual Diagnoses For scheduled or unscheduled non-emergency rides where you are under a physician’s direct care, a Physician Certification Statement signed by the attending physician is required. Emergency transports do not need a PCS, and neither do non-scheduled rides for patients living at home who are not under direct physician care.10Novitas Solutions. Provider Specialty – Ambulance Transport – Physician Certification Statement
If a claim is denied for lack of medical necessity, this documentation is what you and your clinician will want to review and strengthen before filing a redetermination. A clear statement from your treating physician describing why no other mode of transport was safe is often the single most useful piece of evidence.