Telehealth Billing Modifiers 95 and GT Explained

Last Updated on August 31, 2026

Telehealth billing errors rarely come from the CPT code alone. A claim can include the correct service code and complete documentation yet still be denied because the modifier, place of service, patient location, communication method, or payer rule does not align.

Modifier 95 and modifier GT are often treated as interchangeable, but they are not. Modifier 95 generally identifies synchronous audio-video telemedicine in applicable payer contexts, while GT has a narrower current Medicare role. Medicare professional telehealth billing also relies heavily on POS 02 and POS 10, while audio-only services may require modifier 93 or another payer-specific indicator.

This guide explains the difference between modifiers 95, GT, 93, and GQ, how POS 02 and POS 10 affect telehealth claims, and which billing controls can reduce denials and payment variance. 

Telehealth Billing Depends on Multiple Claim Elements

Telehealth billing requires several claim elements to agree. The CPT or HCPCS code must represent a covered service, the communication method must meet payer requirements, the place of service must reflect where the patient received care, and any required modifier must accurately identify the telehealth circumstances.

CMS maintains a current list of services payable under the Medicare Physician Fee Schedule when furnished through telehealth. For 2026, CMS removed the distinction between provisional and permanent services on the Medicare Telehealth Services List and now considers newly added services permanent. Organizations should use the current CMS list and applicable Medicare guidance when determining whether a service is payable through telehealth. 

That makes current-year payer validation important. A modifier used broadly during an earlier telehealth policy period may no longer be the primary identifier for the same claim today.

Across telehealth billing workflows, AnnexMed sees denials and rework arise when organizations apply one modifier rule across Medicare, Medicare Advantage, Medicaid, and commercial plans. The correct claim configuration depends on the payer, service, setting, and technology used.

Modifier 95 for Synchronous Audio Video Telehealth

Modifier 95 identifies synchronous interactive audio-video telemedicine in applicable payer and billing contexts. It does not independently establish coverage or payment. 

For many Medicare professional telehealth claims, POS 02 or POS 10 identifies where the patient received care. Modifier 95 is not automatically required for every Medicare professional telehealth claim. Providers should confirm the current CMS and Medicare Administrative Contractor instructions for the specific service and date of service.

For institutional billing, CMS instructs hospitals to use modifier 95 for outpatient therapy services furnished through telehealth by qualified physical therapists, occupational therapists, and speech-language pathologists employed by hospitals.  

Modifier 95 also remains relevant in selected Medicare settings. For RHC and FQHC mental health visits, CMS instructs organizations to use modifier 95 for qualifying audio-video encounters and modifier 93 for qualifying audio-only encounters. 

Commercial payers may still require modifier 95 even when a telehealth POS code is reported. Billing teams should therefore validate payer policy before applying the modifier.

An EHR that automatically appends modifier 95 to every virtual encounter can create repeat claim errors if the service, payer, or communication method does not support that configuration.

Modifier GT and Its Current Medicare Role

Modifier GT historically identified services furnished through interactive audio and video telecommunications. Because it was widely associated with telehealth, some billing teams still treat it as a general alternative to modifier 95.

Medicare does not generally require GT for standard professional telehealth claims. Its current Medicare use includes specific institutional billing circumstances, such as applicable Critical Access Hospital Method II distant-site arrangements.

GT is therefore not simply an older version of modifier 95. Its Medicare use is tied to a specific billing methodology.

Other payers may publish their own GT requirements. A commercial or Medicaid plan may accept GT, require 95, rely primarily on POS reporting, or apply different rules by service. Billing teams should use the payer policy in effect for the date of service.

Other Telehealth Modifiers and Billing Indicators

Telehealth billing extends beyond modifiers 95 and GT. Other identifiers may apply depending on communication technology, provider setting, and payer policy.

Modifier 93

Modifier 93 identifies synchronous audio-only telemedicine. Because audio-only coverage is not universal, the service, provider, documentation, medical necessity, and payer policy must support the encounter before modifier 93 is reported. 

Modifier GQ

Modifier GQ applies to asynchronous, or store-and-forward, telehealth under a narrow Medicare circumstance. CMS instructs practitioners to use GQ when asynchronous telehealth is furnished as part of a federal telemedicine demonstration in Alaska or Hawaii. GQ is not a general modifier for all asynchronous or store-and-forward encounters.

A modifier can therefore remain valid while applying only to a limited billing scenario.

Place of Service Codes in Telehealth Billing

Telehealth modifiers cannot be reviewed separately from place of service.

CMS instructs physicians and practitioners to use POS 02 when the patient receives telehealth somewhere other than the patient’s home and POS 10 when the patient receives telehealth in the home.

POS 02 Telehealth Provided Other Than in the Patients Home

POS 02 identifies telehealth provided when the patient is not located in the home.

POS 10 Telehealth Provided in the Patients Home

POS 10 identifies telehealth furnished while the patient is in a private residence. CMS states that Medicare telehealth services provided to patients in their homes are paid at the non-facility Physician Fee Schedule rate.

Because patient location can influence claim configuration and payment, registration and scheduling teams need a reliable way to capture where the patient was located during the encounter.

AnnexMed often sees telehealth rework begin when patient location is not consistently carried from scheduling or registration into billing. Coding may be correct while the claim still carries the wrong POS.

Common Telehealth Modifier Errors That Affect Reimbursement

Telehealth claim errors usually involve the relationship between several fields rather than the modifier alone.

Common problems include:

• Using modifier 95 or GT based on historical workflows rather than current payer policy
• Applying a telehealth modifier to a service that is not covered through telehealth
• Using POS 02 when the patient was actually at home
• Using POS 10 when the patient was in another setting
• Reporting an audio-video modifier for an audio-only encounter
• Applying modifier 93 without confirming audio-only coverage
• Using GT without confirming that the payer or billing methodology requires it
• Allowing EHR defaults to override payer-specific requirements

These errors can lead to rejections, denials, payment differences, corrected claims, and staff rework.

Payment reconciliation should compare expected reimbursement with actual payment to identify hidden telehealth billing variance. A paid claim does not always confirm that the modifier, POS, or reimbursement methodology was correct.

Operational Controls for Accurate Telehealth Billing

Hospitals and provider organizations can reduce telehealth billing errors by building payer logic into the workflow before claim submission.

A practical control structure should confirm:

1. The service is eligible for telehealth
2. The provider is eligible to furnish the service
3. The communication method is documented
4. The patient’s location supports the reported POS
5. The correct modifier is applied when required
6. Payer-specific billing rules are current
7. Claim edits identify conflicting modifier and POS combinations
8. Payment variance is reviewed after adjudication
9. Confirm whether the claim is professional or institutional before applying the modifier.
10. Validate the date of service against the payer policy in effect at that time.

Payer matrices should be maintained by line of business and updated when Medicare, Medicaid, Medicare Advantage, or commercial policies change. They should identify service eligibility, modifier requirements, POS rules, audio-only coverage, and documentation expectations.

Pre-bill edits are most useful when they identify logical conflicts. An audio-only encounter should not automatically carry an audio-video modifier. A GT modifier on a Medicare claim should trigger validation that the relevant billing methodology applies.

Denial and payment data should also feed back into the payer matrix. Repeated telehealth denials from one payer may indicate a policy change, configuration issue, or documentation pattern rather than an isolated coding mistake. A periodic medical coding audit can also help identify recurring modifier, POS, and documentation patterns before they affect a larger claim population.

Turning Telehealth Billing Rules Into Revenue Control 

Telehealth billing accuracy depends on the service code, communication method, patient location, provider type, modifier, POS, documentation, and payer policy aligning before the claim is submitted.

AnnexMed supports telehealth billing through:

• Payer-specific modifier validation
• CPT and HCPCS review
• POS 02 and POS 10 validation
• Audio-video and audio-only billing checks
• Pre-bill claim edits
• Documentation and coding review
• Denial root-cause analysis
• Payment posting and reconciliation

The objective is to identify why a telehealth claim configuration failed and prevent the same issue from repeating across future encounters.

By connecting coding, billing, denial, and payment data, AnnexMed helps hospitals and provider organizations strengthen telehealth reimbursement while reducing avoidable rework.

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