HCPCS Level II · Transportation, medical and surgical supplies
A0431Ambulance service, conventional air services, transport, one way (rotary wing)
✓ Active
Source: CMS HCPCS quarterly update, October 2026. Page updated September 29, 2026.
About A0431
A0431 is an HCPCS Level II code in the A series (transportation, medical and surgical supplies), describing ambulance service, conventional air services, transport, one way (rotary wing).
It was added to HCPCS effective 01/01/2001.
Its Medicare coverage code is "C", meaning coverage is left to the Medicare contractor's judgment.
Details
- Short description
- Rotary wing air transport
- Date added
- 01/01/2001
- Action effective
- 01/01/2001
- BETOS
- O1A
Related A04xx codes
- A0420Ambulance waiting time (als or bls), one half (1/2) hour increments
- A0422Ambulance (als or bls) oxygen and oxygen supplies, life sustaining situation
- A0424Extra ambulance attendant, ground (als or bls) or air (fixed or rotary winged); (requires medical review)
- A0425Ground mileage, per statute mile
- A0426Ambulance service, advanced life support, non-emergency transport, level 1 (als 1)
- A0427Ambulance service, advanced life support, emergency transport, level 1 (als 1 - emergency)
- A0428Ambulance service, basic life support, non-emergency transport, (bls)
- A0429Ambulance service, basic life support, emergency transport (bls-emergency)
- A0430Ambulance service, conventional air services, transport, one way (fixed wing)
- A0432Paramedic intercept (pi), rural area, transport furnished by a volunteer ambulance company which is prohibited by state law from billing third party payers
- A0433Advanced life support, level 2 (als 2)
- A0434Specialty care transport (sct)
Common questions about A0431
Is HCPCS A0431 still valid?
- Yes. A0431 is active in the CMS October 2026 HCPCS file.
Does Medicare cover A0431?
- Its coverage code is "C": coverage is left to the Medicare contractor's judgment. Check the local coverage determination for your region.