TT HCPCS Level II modifier: Individualized service provided to more than one patient in same setting
TT is a HCPCS Level II modifier: “Individualized service provided to more than one patient in same setting.” It adds this detail to the code it is reported with.
Official description
TTIndividualized service provided to more than one patient in same setting
Short description: Additional patient
HCPCS · United States
Medicare details
The indicators CMS publishes with TT in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Not payable by Medicare
- Added
- Oct 1, 2002
Where TT sits
- 1GroupHCPCS modifiers
- 2Modifier TTIndividualized service provided to more than one patient in same setting
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 TT mean?
TT is the HCPCS code for “Individualized service provided to more than one patient in same setting” in CMS’s HCPCS Level II October 2026 release.
Where is TT in the HCPCS Level II list?
TT is listed under Modifiers.
Does Medicare cover TT?
CMS lists TT’s Medicare coverage as “Not payable by Medicare”. 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 TT
All modifiersTMIndividualized education program (iep)TNRural/outside providers' customary service areaTPMedical transport, unloaded vehicleTQBasic life support transport by a volunteer ambulance providerTRSchool-based individualized education program (iep) services provided outside the public school district responsible for the studentTSFollow-up serviceTUSpecial payment rate, overtimeTVSpecial payment rates, holidays/weekendsTWBack-up equipmentU1Medicaid level of care 1, as defined by each stateU2Medicaid level of care 2, as defined by each stateU3Medicaid level of care 3, as defined by each state