A0431 – Ambulance service, conventional air services, transport, one way (rotary wing)
HCPCS Level II code · A codes: Transportation, Medical & Surgical Supplies, Miscellaneous & Experimental
HCPCS codeA0431
- Long description
- Ambulance service, conventional air services, transport, one way (rotary wing)
- Short description
- Rotary wing air transport
- Pricing indicator
52Reasonable charge- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
O1AAmbulance- Added
- January 1, 2001
- Last change
- January 1, 2001 – No change
Frequently asked questions
What is HCPCS code A0431?
A0431 is a HCPCS Level II code for ambulance service, conventional air services, transport, one way (rotary wing).
Does Medicare cover A0431?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby A codes
- A0422 – Ambulance (als or bls) oxygen and oxygen supplies, life sustaining situation
- A0424 – Extra ambulance attendant, ground (als or bls) or air (fixed or rotary winged); (requires medical review)
- A0425 – Ground mileage, per statute mile
- A0426 – Ambulance service, advanced life support, non-emergency transport, level 1 (als 1)
- A0427 – Ambulance service, advanced life support, emergency transport, level 1 (als 1 - emergency)
- A0428 – Ambulance service, basic life support, non-emergency transport, (bls)
- A0429 – Ambulance service, basic life support, emergency transport (bls-emergency)
- A0430 – Ambulance service, conventional air services, transport, one way (fixed wing)
- A0432 – Paramedic intercept (pi), rural area, transport furnished by a volunteer ambulance company which is prohibited by state law from billing third party payers
- A0433 – Advanced life support, level 2 (als 2)
- A0434 – Specialty care transport (sct)
- A0435 – Fixed wing air mileage, per statute mile
- A0436 – Rotary wing air mileage, per statute mile
- A0888 – Noncovered ambulance mileage, per mile (e.g., for miles traveled beyond closest appropriate facility)
- A0998 – Ambulance response and treatment, no transport
- A0999 – Unlisted ambulance service
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.