HCPCS Level II modifier
Modifier TK
Modifier TK is a HCPCS Level II modifier. CMS describes it as: Extra patient or passenger, non-ambulance.
Source: CMS HCPCS Level II, October 2026 file dated September 23, 2026. Publisher page
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- Modifier
- TK
- Type
- HCPCS Level II modifier, maintained by CMS
- CMS description
- Extra patient or passenger, non-ambulance
- Claim form
- CMS-1500 item 24D, up to four modifiers per line. 837P SV101-3 to SV101-6.
- Guidance
- CMS HCPCS quarterly update
Related modifiers
- TLEarly intervention/individualized family service plan (IFSP)
- TJProgram group, child and/or adolescent
- TMIndividualized education program (IEP)
- THObstetrical treatment/services, prenatal or postpartum
- TNRural/outside providers' customary service area
- TGComplex/high tech level of care
- TPMedical transport, unloaded vehicle
- TFIntermediate level of care
Related pages
Questions
What does modifier TK mean?
Modifier TK is a HCPCS Level II modifier. CMS describes it as: Extra patient or passenger, non-ambulance.
Is modifier TK a CPT or a HCPCS modifier?
TK is a HCPCS Level II modifier from the CMS quarterly HCPCS file. Two-digit numeric modifiers, such as 25 or 59, are CPT modifiers.
Where does modifier TK go on a claim?
On the CMS-1500 it goes in item 24D next to the procedure code. Each line holds up to four modifiers. On an 837P it goes in SV101-3 to SV101-6.
What denial comes back when a modifier is wrong?
A missing or mismatched modifier often comes back as CARC 4. A modifier that was not valid on the date of service comes back as CARC 182. A bundling edit the modifier should have bypassed comes back as CARC 97 or 236.