T4 HCPCS Level II modifier: Left foot, fifth digit
T4 is a HCPCS Level II modifier: “Left foot, fifth digit.” It adds this detail to the code it is reported with.
Official description
T4Left foot, fifth digit
HCPCS · United States
Medicare details
The indicators CMS publishes with T4 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Added
- Jan 1, 1995
Where T4 sits
- 1GroupHCPCS modifiers
- 2Modifier T4Left foot, fifth digit
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 T4 mean?
T4 is the HCPCS code for “Left foot, fifth digit” in CMS’s HCPCS Level II October 2026 release.
Where is T4 in the HCPCS Level II list?
T4 is listed under Modifiers.
Does Medicare cover T4?
CMS lists T4’s Medicare coverage as “Carrier judgment”. 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 T4
All modifiersSWServices provided by a certified diabetic educatorSYPersons who are in close contact with member of high-risk population (use only with codes for immunization)SZHabilitative servicesT1Left foot, second digitT2Left foot, third digitT3Left foot, fourth digitT5Right foot, great toeT6Right foot, second digitT7Right foot, third digitT8Right foot, fourth digitT9Right foot, fifth digitTALeft foot, great toe