A0999 HCPCS Level II code: Unlisted ambulance service
A0999 is the HCPCS code for “Unlisted ambulance service” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
A0999Unlisted ambulance service
HCPCS · United States
Medicare details
The indicators CMS publishes with A0999 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Special coverage instructions apply
- Medicare pricing
- Other carrier priced
- Type of service
- Ambulance
- BETOS category
- Ambulance
- Added
- Jan 1, 1987
Where A0999 sits
- 1A codesAmbulance, supplies and miscellaneous
- 2Active code A0999Unlisted ambulance service
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code A0999 mean?
A0999 is the HCPCS code for “Unlisted ambulance service” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover A0999?
CMS lists A0999’s Medicare coverage as “Special coverage instructions apply” and its pricing as “Other carrier priced”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside A0999
All A codesA0433Advanced life support, level 2 (als 2)A0434Specialty care transport (sct)A0435Fixed wing air mileage, per statute mileA0436Rotary wing air mileage, per statute mileA0888Noncovered ambulance mileage, per mile (e.g., for miles traveled beyond closest appropriate facility)A0998Ambulance response and treatment, no transportA2001Innovamatrix ac, per square centimeter (add-on, list separately in addition to primary procedure)A2002Mirragen advanced wound matrix, per square centimeter (add-on, list separately in addition to primary procedure)A2004Xcellistem, 1 mgA2005Microlyte matrix, per square centimeter (add-on, list separately in addition to primary procedure)A2006Novosorb synpath dermal matrix, per square centimeter (add-on, list separately in addition to primary procedure)A2007Restrata, per square centimeter (add-on, list separately in addition to primary procedure)