Modifier GT: Telehealth Interactive Audio and Video
Modifier GT indicates a telehealth service delivered via interactive audio and video. Learn when to use modifier GT for Medicare and other payers.
When to Append Modifier GT
Append to telehealth procedure codes to indicate the service was delivered via live, two-way audio and video communication. Used primarily for Medicare and Medicaid telehealth claims.
- Documentation must specify that the service was performed via real-time interactive audio-video technology and meet all other E/M documentation requirements.
Source: AMA CPT® Modifier Guidelines / CMS
Modifier GT in Detail
What does Modifier GT cover in detail?
Modifier GT identifies a telehealth service delivered via interactive audio and video, a requirement for Medicare billing of telehealth services that also applies to many commercial payers.
See our telehealth billing guide for full telehealth billing rules and the billing modifiers reference for complete modifier GT guidance. Which modifier applies now depends on the claim type, compared in full in GT vs 95.
Using Modifier GT Correctly
How do I use Modifier GT correctly?
When to Apply
Apply this modifier only when the clinical circumstances described in the modifier definition are present and documented in the medical record.
Procedure Code Compatibility
Confirm this modifier is applicable to the procedure codes being billed. Not all modifiers are valid with all CPT codes.
Documentation Support
Ensure the medical record supports the modifier's use. Auditors will review documentation to confirm the modifier is appropriate.
Payer Acceptance
Verify that the payer accepts this modifier and understand how it affects reimbursement before submitting the claim.
Modifier GT Reference
| Field | Details |
|---|---|
| Modifier | GT |
| Full Name | Via Interactive Audio and Video Telecommunication Systems |
| When to Use | Append to telehealth procedure codes to indicate the service was delivered via live, two-way audio and video communication. Used primarily for Medicare and Medicaid telehealth claims. |
| Medicare Context | For Medicare telehealth services, modifier GT was historically required. CMS has moved toward using modifier 95 for synchronous telehealth. Verify current requirements per payer annually. |
| Documentation Requirement | Documentation must specify that the service was performed via real-time interactive audio-video technology and meet all other E/M documentation requirements. |
| Payer-Specific Use | Medicaid programs and some commercial payers still require modifier GT. Always check the current payer telehealth billing guide, as telehealth policy changes frequently. |
Source: AMA CPT® Modifier Guidelines / CMS
Related Billing Resources
Modifier GT, Frequently Asked Questions
Via Interactive Audio and Video Telecommunication Systems
Append to telehealth procedure codes to indicate the service was delivered via live, two-way audio and video communication. Used primarily for Medicare and Medicaid telehealth claims.
For Medicare telehealth services, modifier GT was historically required. CMS has moved toward using modifier 95 for synchronous telehealth. Verify current requirements per payer annually.
Documentation must specify that the service was performed via real-time interactive audio-video technology and meet all other E/M documentation requirements.
Medicaid programs and some commercial payers still require modifier GT. Always check the current payer telehealth billing guide, as telehealth policy changes frequently.
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