HCPCS Level II modifier
Modifier GT
Modifier GT is a HCPCS Level II modifier. CMS describes it as: Via interactive audio and video telecommunication systems.
Source: CMS HCPCS Level II, October 2026 file dated September 23, 2026. Publisher page
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- Modifier
- GT
- Type
- HCPCS Level II modifier, maintained by CMS
- CMS description
- Via interactive audio and video telecommunication systems
- Claim form
- CMS-1500 item 24D, up to four modifiers per line. 837P SV101-3 to SV101-6.
- Guidance
- CMS HCPCS quarterly update
Telehealth
Related modifiers
- 95Synchronous telemedicine (audio and video)
- 93Audio-only telemedicine
- GQVia asynchronous telecommunications system
- FQThe service was furnished using audio-only communication technology
- FRThe supervising practitioner was present through two-way, audio/video communication technology
- GUWaiver of liability statement issued as required by payer policy, routine notice
- GSDosage of erythropoietin stimulating agent has been reduced and maintained in response to hematocrit or hemoglobin level
- GVAttending physician not employed or paid under arrangement by the patient's hospice provider
Related pages
- All CPT and HCPCS modifiersA to Z list
- CMS-1500 claim formModifiers go in item 24D
- Denial code CO-4Modifier missing or does not fit the code
- Denial code CO-182Modifier invalid on the date of service
- Place of service 02Telehealth outside the patient's home
- Place of service 10Telehealth in the patient's home
- HCPCS Level II code lookup
- Denial and remark codes
Questions
What does modifier GT mean?
Modifier GT is a HCPCS Level II modifier. CMS describes it as: Via interactive audio and video telecommunication systems.
Is modifier GT a CPT or a HCPCS modifier?
GT 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 GT 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.