A0420
HCPCSAmbulance waiting 1/2 hr
Official HCPCS Level II long descriptor
Ambulance waiting time (als or bls), one half (1/2) hour increments
HCPCS Level II code A0420 is maintained by CMS and is active in the current quarterly release.
Short descriptor
Ambulance waiting 1/2 hr
Added to HCPCS: 1995-01-01
Nearby codes in A0
- A0380Basic life support mileage
- A0382Basic support routine suppls
- A0384Bls defibrillation supplies
- A0390Advanced life support mileag
- A0392Als defibrillation supplies
- A0394Als iv drug therapy supplies
- A0396Als esophageal intub suppls
- A0398Als routine disposble suppls
- A0422Ambulance 02 life sustaining
- A0424Extra ambulance attendant
- A0425Ground mileage
- A0426Als 1
- A0427Als1-emergency
- A0428Bls
- A0429Bls-emergency
- A0430Fixed wing air transport
Where this code sits
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HCPCS Level II July 2026 quarterly update. Centers for Medicare & Medicaid Services (CMS), “July 2026 Alpha-Numeric HCPCS File” (HCPC2026_JUL_ANWEB_06172026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.