How are air ambulance claims handled under the No Surprises Act?
A covered air ambulance flight by a nonparticipating provider is billed to the plan, and the patient owes in-network cost sharing only. The plan then has 30 calendar days to pay or deny, and any gap between its payment and your rate goes through open negotiation and federal IDR. The rest of this post is the working order for a billing lead, with the fields, dates and evidence to line up at each step.
Written by Salman Saeed, CEO and Co-Founder · Reviewed by a Certified Medical Coder · 
In short: treat an air ambulance claim as a plan claim from the first day. Confirm the plan covers air ambulance benefits, bill helicopter or airplane transport with mileage in statute miles, collect only cost sharing from the patient, and start open negotiation on time if the payment is short.
How are air ambulance claims handled under the No Surprises Act?
They follow a plan-first path. Under 45 CFR 149.440(a), a nonparticipating provider of air ambulance services must not bill, and must not hold liable, the patient for more than the cost-sharing amount. Under 45 CFR 149.130, the plan covers the transport at in-network cost sharing and pays you the rest of the out-of-network rate.
This post covers the practical order of work. The definitions, the full QPA method and the six IDR factors are on the air ambulance reference page, so we link there instead of repeating them.
Which flights does the rule cover?
Only air transport. Under 45 CFR 149.30, an air ambulance service is medical transport by a rotary wing (helicopter) or fixed wing (airplane) air ambulance, as 42 CFR 414.605 defines those terms. The rule applies when the patient's group health plan or individual coverage provides or covers any benefits for air ambulance services (45 CFR 149.130(a)).
Two checks before you bill. First, confirm the patient's coverage actually includes air ambulance benefits. Second, confirm the flight was a rotary wing or fixed wing transport under those definitions. For ground transport, the sections cited here do not apply, so follow state law and the payer's contract instead.
What is the order of work for an air ambulance claim?
What dates do you calendar once the initial payment arrives?
Three windows run back to back, all in business days. You can send the written open negotiation notice within 30 business days of the initial payment or denial. Open negotiation then runs 30 business days. Either side can start federal IDR within 4 business days after it ends (45 CFR 149.510).
Your group receives the plan's initial payment on Monday, December 7, 2026. The 30-business-day window to send the open negotiation notice, counting December 7 as day 1, ends Wednesday, January 20, 2027, with Christmas Day, New Year's Day and Martin Luther King Jr. Day excluded. You send the notice on Friday, December 11, 2026. Open negotiation then ends Tuesday, January 26, 2027. The 4-business-day window to start IDR runs from Wednesday, January 27 to Monday, February 1, 2027. You can check any claim of your own with our NSA deadline calculator.
What does the patient owe, in numbers?
Patient cost sharing is the plan's in-network percentage or copay applied to the lesser of the QPA or the billed amount, and what the patient pays counts toward in-network limits under 45 CFR 149.130(b)(3).
An air ambulance provider bills $62,000 for a transport with a QPA of $27,500. The patient has 20% coinsurance and has met the deductible. The lesser figure is $27,500, so the patient owes 20% of that, which is $5,500, not 20% of $62,000. If the rate later settles at $45,000 and the plan paid $13,000 initially, the plan still owes $45,000 minus $5,500 minus $13,000, which is $26,500.
How do you build the offer and evidence packet for IDR?
State your offer as a dollar amount and as a percentage of the QPA, as 45 CFR 149.510 requires. A $36,000 offer against a $24,000 QPA is stated as $36,000 and 150% of the QPA. Then organize the packet around the six considerations the certified IDR entity weighs under 45 CFR 149.520(b)(2).
- Quality and outcome measures for your program, with the date of each measure.
- Flight record and clinical summary showing acuity or complexity for this patient.
- Crew roles and training records for the flight, and the aircraft type and capability level used.
- The pick-up location and its population density category.
- Network contracting correspondence and any contracted rates from the previous 4 plan years.
Leave out usual and customary charges and public payor rates such as Medicare and Medicaid. The entity must not consider them, so material built around them wastes space in the packet. Our IDR process guide covers the portal steps, and the QPA page explains how to test the plan's figure.
What mistakes slow air ambulance claims down?
| Mistake | What happens | Fix |
|---|---|---|
| Patient statement sent for the full charge | Violates the balance billing ban | Void it and reissue for cost sharing only |
| Mileage billed in nautical miles | QPA and payment calculated on the wrong distance | Rebill the mileage line in statute miles |
| Open negotiation notice sent after the 30-business-day window | Starts the dispute path late; check the dates in 45 CFR 149.510 | Calendar the window from the initial payment date |
| Offer stated only in dollars | Offer does not meet the form requirement | Restate it as a dollar amount and a percentage of the QPA |
How Nucleus Align handles air ambulance claims
We recover the revenue insurers underpaid you under the No Surprises Act, checking plan type and eligibility first and then working the claim through open negotiation and federal IDR, or the applicable state pathway. Our out-of-network billing and IDR service keeps deadlines and required fees under one set of controls, and our emergency medicine billing team supports air programs tied to emergency departments. To review your open flights, book a call.
- 45 CFR 149.130 Preventing surprise medical bills for air ambulance services · eCFR
- 45 CFR 149.440 Balance billing in cases of air ambulance services · eCFR
- 45 CFR 149.520 Independent dispute resolution process for air ambulance services · eCFR
- 45 CFR 149.510 Independent dispute resolution process · eCFR
- 45 CFR 149.140 Methodology for calculating qualifying payment amount · eCFR
- 45 CFR 149.30 Definitions · eCFR
We check every rule, code and deadline against the official source. See our editorial policy.
Common questions
Straight answers from the team that does the work.
Ask a billing lead directly. A 20-minute call, Monday to Friday, 9am to 5pm Eastern.
01How are air ambulance claims handled under the No Surprises Act?
You bill the plan, and the patient owes in-network cost sharing only, calculated on the lesser of the QPA or the billed amount. The plan has 30 calendar days to pay or deny. If the payment is short, you use open negotiation and then federal IDR to settle the out-of-network rate.
02Can I bill the patient the difference after the plan pays?
No. Under 45 CFR 149.440(a), a nonparticipating air ambulance provider cannot bill the patient for more than the cost-sharing amount. The remaining balance is a dispute with the plan, settled by agreement, a certified IDR entity decision or the applicable state law.
03What do I send for the mileage line?
Bill mileage with air mileage service codes A0435 and A0436, using loaded miles. The QPA rules express the mileage rate in statute miles, not nautical miles, so report distance on that basis. The point of pick-up is where the patient was placed on board.
04When can an air ambulance dispute go to federal IDR?
After open negotiation ends without agreement. You have 30 business days from the initial payment or denial to send the open negotiation notice, the negotiation runs 30 business days, and either side can start IDR within 4 business days after it ends, under 45 CFR 149.510.
Talk to a billing lead.
A 20-minute call about your payers, volume and setup. Monday to Friday, 9am to 5pm Eastern.