A0422 HCPCS code: Ambulance (als or bls) oxygen and oxygen supplies, life sustaining situation
A0422 is the HCPCS Level II code for ambulance (als or bls) oxygen and oxygen supplies, life sustaining situation. Its Medicare coverage code is I (Not payable by Medicare): Medicare does not pay separately under this code; another code applies.
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | I — Not payable by Medicare |
| Pricing indicator | 00 — Not separately priced by Medicare |
| BETOS category | O1A — Ambulance |
| Added | 1995-01-01 |
| Last action effective | 2014-01-01 |
What changed for A0422
- 1995-01-01: A0422 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code A0422?
A0422 is the HCPCS Level II code for ambulance (als or bls) oxygen and oxygen supplies, life sustaining situation. Short descriptor: "Ambulance 02 life sustaining".
Does Medicare cover A0422?
Coverage code I — Not payable by Medicare. Medicare does not pay separately under this code; another code applies.
Related A04 codes
- A0420 — Ambulance waiting time (als or bls), one half (1/2) hour increments
- 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)
- A0431 — Ambulance service, conventional air services, transport, one way (rotary 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)
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Next steps
- Run a reimbursement report for a device billed under A0422
- Watch A0422 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A0422
Sources: CMS HCPCS Level II release October 2025; CMS DMEPOS fee schedule; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.