When Medicare denies an ambulance ride as "not medically necessary," it means the claim didn't show that other transport was unsafe for your condition. Under the federal rule, your condition must require both the ambulance and the level of care given. You can appeal by the date on your Medicare Summary Notice, and the strongest appeals use records that describe your condition at the time of the ride.
What does "medically necessary" mean for an ambulance?
The federal rule at 42 CFR 410.40 says Medicare covers ambulance services only when other ways of traveling are unsafe for your condition. It also says your condition must require both:
- The ambulance ride itself, and
- The level of service given, such as basic or advanced life support.
Denials can come down to the records. If the trip notes say "patient alert, walking," the claim may look like a car would have been fine. If they describe chest pain, low blood pressure, needing to lie flat, or needing oxygen and monitoring, the story is different.
For general ambulance coverage, see ambulance bills and Medicare coverage.
Why might a needed ride be denied?
- Thin documentation. The trip report didn't describe symptoms well.
- Wrong code. The ride was billed at a level the notes don't support, or a diagnosis code was missing.
- Missing certification. For some non-emergency rides, a doctor's certification was needed. See non-emergency ambulance rides: the doctor's certification form.
- Destination. The ride went somewhere other than the nearest appropriate facility.
The first two can sometimes be fixed by the ambulance company resubmitting the claim.
What records should I gather?
- The Medicare Summary Notice (MSN) showing the denial and the deadline. See how to read your Medicare Summary Notice.
- The ambulance bill, itemized.
- The trip report from the ambulance company. It records what the crew saw and did. Ask for a copy.
- Hospital or ER records for that day, showing your condition on arrival.
- A letter from your doctor, if possible, explaining why another way of traveling wasn't safe.
- Any ABN you signed before the ride.
What to say to the ambulance company:
"Medicare denied the ride on [date] as not medically necessary. Can you send me a copy of the trip report and the codes you billed? Can you check whether the claim was coded correctly and resubmit if needed? Please hold my account while we sort this out."
What to ask the doctor's office:
"Medicare denied an ambulance ride on [date] for [patient name]. Could the doctor write a short letter explaining why a car or wheelchair van wasn't safe that day, based on their condition?"
How do I write the appeal?
Medicare's appeals booklet says to start with your MSN and file by the date listed on it. Follow the MSN's instructions, or use the redetermination request form. Include:
- Your name and Medicare information.
- The date of the ride and the ambulance company.
- The service you're appealing.
- Why you think it should be covered.
- Copies of supporting records.
Sample appeal letter:
"I am appealing the denial of ambulance services on [date] by [company], shown on my Medicare Summary Notice dated [date]. Medicare said the service was not medically necessary.
On that day, [describe condition: for example, I had chest pain and low blood pressure and could not sit upright]. Under 42 CFR 410.40, Medicare covers ambulance transport when other means of transportation are contraindicated. Other transport was not safe because [reason]. The enclosed trip report, hospital records, and letter from Dr. [name] support this.
Please reconsider the denial."
Keep copies of everything. See how to appeal a Medicare denial, step by step.
Should I pay while the appeal is pending?
Ask the ambulance company to hold the bill in writing while the appeal is reviewed. Some billing offices will wait once they know an appeal is filed.
If you signed an ABN before the ride, CMS says it shifts potential financial responsibility to you if Medicare denies. You can still appeal Medicare's decision if you chose the option that has the company bill Medicare.