U codes: Laboratory testing (special program codes)
Codes CMS created for particular laboratory testing programs.
Active HCPCS U codes
Each opens its own page with CMS’s full descriptor, Medicare indicators and dates.
Terminated HCPCS U codes
Codes CMS has ended, kept for looking up older claims. Each page gives its last date of service.
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This list is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes, imported from CMS’s October 2026 HCPCS file and checked against it.
Frequently asked questions
What are HCPCS U codes?
HCPCS U codes cover codes CMS created for particular laboratory testing programs.
How many HCPCS U codes are there?
CMS’s October 2026 HCPCS file lists 2 active HCPCS U codes, and 3 more that it has terminated.
Are terminated HCPCS U codes listed?
Yes, after the active codes, each with its last date of service, for looking up older claims. A terminated code can’t be used for newer services.