A0999 – Unlisted ambulance service

HCPCS Level II code · A codes: Transportation, Medical & Surgical Supplies, Miscellaneous & Experimental

Active code Special coverage instructions apply

HCPCS codeA0999
Long description
Unlisted ambulance service
Short description
Unlisted ambulance service
Pricing indicator
57 Other carrier priced
Medicare coverage
D Special coverage instructions apply
BETOS category
O1A Ambulance
Added
January 1, 1987
Last change
January 1, 1998 – No change

Frequently asked questions

What is HCPCS code A0999?

A0999 is a HCPCS Level II code for unlisted ambulance service.

Does Medicare cover A0999?

The HCPCS file lists coverage code D: Special coverage instructions apply. Coverage and payment also depend on local coverage determinations and the patient’s plan.

Nearby A codes

Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.