Gq Modifier Complete Guide
GQ modifier indicates a telehealth service delivered via an asynchronous telecommunications system (such as store-and-forward technology) rather than real-time interactive audio-video. Appending this modifier to your claims communicates that medical data or images were collected and transmitted for later review by a physician, ensuring proper compliance and accurate reimbursement under specific state Medicaid or commercial payer guidelines that recognize asynchronous care.
GQ Modifier in Medical Billing: Asynchronous Telehealth Service Guidelines
Not all telehealth happens live. A patient’s skin lesion gets photographed at a rural clinic, the images get securely transmitted to a dermatologist a hundred miles away, and that dermatologist reviews them hours later and renders an opinion, no live video call, no real-time conversation at all. That’s asynchronous telehealth, commonly called store-and-forward, and it has its own dedicated modifier with one of the more surprising restrictions in the entire Medicare modifier list.
The GQ modifier identifies a telehealth service delivered via an asynchronous, store-and-forward telecommunications system, where recorded patient information is transmitted to a distant site practitioner for review outside of a real-time interaction. Under Medicare fee-for-service rules, its use is tightly restricted, limited specifically to physicians and practitioners affiliated with a federal telemedicine demonstration program conducted in Alaska or Hawaii. That narrow scope surprises a lot of billing teams who assume GQ works the same way everywhere. This guide covers exactly what asynchronous telehealth means, why Medicare’s rule is so geographically specific, and where GQ applies more broadly outside of traditional Medicare.
What is the GQ Modifier?
GQ is a HCPCS Level II modifier that stands for Via asynchronous telecommunications system. It’s appended to the professional service CPT or HCPCS code to indicate that the service was delivered through store-and-forward technology rather than a live, interactive audio-video connection between the patient and the provider.
Store-and-forward telehealth involves transmitting recorded medical information, digital images, x-rays, video clips, or other clinical data, from an originating location to a practitioner at a distant site, who reviews it and renders a clinical opinion outside of any real-time exchange with the patient. It’s a fundamentally different model from the synchronous video visits most people picture when they hear “telehealth.” There’s no live conversation happening; the information is captured, sent, and reviewed on the practitioner’s own time.
Why Medicare Restricts GQ So Narrowly
This is the single most important thing to understand about GQ, and it surprises almost everyone encountering it for the first time. Under the Balanced Budget Act of 1997, Congress limited Medicare’s telehealth coverage in a way that specifically prohibited asynchronous, store-and-forward technology as a substitute for live, interactive telecommunications. That statutory limitation has never been fully lifted for standard Medicare fee-for-service telehealth.
CMS carved out exactly one exception to that prohibition: federal telemedicine demonstration programs conducted in Alaska or Hawaii. Within those specific demonstration programs, store-and-forward technology is allowed to substitute for a live interactive connection, and GQ is the modifier that certifies a claim falls within that narrow exception. Outside of an Alaska or Hawaii federal telemedicine demonstration program, standard Medicare fee-for-service generally still requires real-time, interactive audio and video communication for a telehealth service to be billable at all.
That’s a genuinely unusual structure in Medicare billing. Most modifiers apply nationally, tied to a clinical or administrative fact rather than a specific state’s demonstration program. GQ is different: its validity under Medicare depends directly on the distant site practitioner’s actual affiliation with one of these two specific programs.
What the GQ Modifier Actually Certifies
When a practitioner appends GQ to a claim, they’re making a specific attestation, not just describing a technology. By using GQ, the distant site practitioner is certifying that the asynchronous medical file was collected and transmitted to them from a federal telemedicine demonstration project conducted specifically in Alaska or Hawaii.
That’s a meaningful distinction from most telehealth modifiers, which typically just describe how a service was delivered. GQ describes both how the service was delivered and confirms a specific, narrow programmatic eligibility that has to actually be true. Medicare Administrative Contractors are explicitly permitted to require documentation of a practitioner’s participation in one of these federal demonstration programs before paying a GQ-modified claim, and contractors are directed to deny telehealth services where the billing physician or practitioner isn’t actually eligible.
What Qualifies as Asynchronous Telehealth
Not every non-live exchange of clinical information counts as billable store-and-forward telehealth. CMS draws specific lines around what qualifies.
| Communication Type | Qualifies as Asynchronous Telehealth Under GQ? |
|---|---|
| Secure digital images or video specific to the patient's condition (e.g., dermatological photographs) | Yes, when adequate for rendering or confirming a diagnosis or treatment plan |
| Recorded clinical data transmitted through a secure electronic system | Yes |
| Telephone calls | No |
| Images transmitted via fax machine | No |
| Text messages or unsecured email without visualization of the patient | No |
GQ Within the Telehealth Modifier Family
GQ sits alongside several other telehealth-related modifiers, and understanding where it fits relative to the others clarifies when it’s actually the right choice.
| Modifier | What It Indicates | Typical Current Use |
|---|---|---|
| 95 | Synchronous telemedicine via real-time interactive audio and video | The dominant modifier for most live video telehealth visits across Medicare, Medicaid, and commercial payers |
| 93 | Synchronous telemedicine via audio-only communication | Real-time, but without video, such as a telephone-only visit |
| GT | Synchronous audio-video telehealth (legacy) | Largely phased out for Medicare professional claims, but still required for Critical Access Hospital Method II institutional billing |
| GQ | Asynchronous, store-and-forward telehealth | Narrowly restricted under Medicare to Alaska/Hawaii federal demonstration programs; more broadly used under some state Medicaid programs and commercial payers |
The distinction between GQ and modifier 93 deserves particular attention, since it’s a common point of confusion. Audio-only telehealth (modifier 93) is still a real-time, synchronous interaction, the provider and patient are on the phone together at the same moment, just without video. GQ-eligible asynchronous telehealth involves no real-time interaction between provider and patient at all; the information is captured, transmitted, and reviewed entirely separately in time. Audio-only and asynchronous are fundamentally different concepts, even though both lack a live video component.
GQ Beyond Traditional Medicare: State Medicaid and Commercial Payers
Here’s where the picture broadens considerably. While traditional Medicare fee-for-service restricts GQ to the Alaska and Hawaii federal demonstration programs specifically, many state Medicaid programs and commercial payers recognize and reimburse store-and-forward telehealth far more broadly, particularly for specialties where asynchronous review is clinically well suited, most notably teledermatology, teleophthalmology, and certain radiology applications.
| Payer Type | Typical GQ / Store-and-Forward Coverage |
|---|---|
| Traditional Medicare (fee-for-service) | Restricted to Alaska/Hawaii federal telemedicine demonstration program participants only |
| State Medicaid programs | Varies significantly by state; some states, including relatively permissive programs, cover store-and-forward broadly, particularly for teledermatology |
| Commercial payers | Coverage varies by plan and contract; many commercial payers reimburse store-and-forward services, especially in dermatology, but policies should be verified individually |
That gap between Medicare’s narrow rule and the broader coverage many state Medicaid and commercial plans offer is exactly why GQ shows up in billing conversations far more often than its strict Medicare eligibility would suggest. A teledermatology practice might legitimately bill a consultation code with GQ under a state Medicaid program’s store-and-forward policy, while that exact same billing pattern would be inappropriate for a Medicare fee-for-service patient whose distant site practitioner has no actual affiliation with the Alaska or Hawaii demonstration programs.
GQ Documentation and Eligibility Requirements
Proper GQ modifier billing requires documentation confirming that the telehealth service was delivered through an asynchronous store-and-forward telecommunications system and met applicable payer eligibility requirements. Records should clearly support the technology used, patient and provider eligibility, medical necessity, and compliance with current Medicare or payer-specific telehealth rules.
| Requirement | Why It Matters |
|---|---|
| Distant site practitioner's documented affiliation with an Alaska or Hawaii federal telemedicine demonstration program (for Medicare fee-for-service claims) | This is the foundational eligibility requirement; without it, GQ shouldn't be billed to traditional Medicare at all |
| Confirmation the transmitted images or data are specific to the patient's condition and diagnostically adequate | Distinguishes legitimate store-and-forward review from an informal, non-billable exchange of information |
| Use of a secure transmission method | Fax and unsecured text or email don't meet the standard for billable asynchronous telehealth |
| Confirmation the billed CPT/HCPCS code appears on the applicable telehealth-eligible code list | GQ can only be submitted with codes CMS (or the relevant payer) has designated as telehealth-eligible |
| Eligible practitioner type | Only specific practitioner categories, physicians, and certain non-physician practitioners with defined restrictions, may bill telehealth services under this modifier |
| State-specific or payer-specific policy documentation, when billing outside traditional Medicare | Since Medicaid and commercial coverage of store-and-forward varies significantly, confirming the specific payer's policy is essential before relying on GQ |
Common GQ Modifier Billing Mistakes
Common GQ modifier billing mistakes include applying the modifier to real-time telehealth visits, overlooking payer-specific eligibility rules, and failing to document the store-and-forward technology used. Incorrect modifier selection or insufficient supporting records can result in claim denials, delayed reimbursement, and increased compliance risk.
| Mistake | What's Actually Happening |
|---|---|
| Billing GQ to traditional Medicare without an actual Alaska or Hawaii federal demonstration program affiliation | This is the single most consequential error; Medicare Administrative Contractors are directed to deny claims where this eligibility isn't genuinely met |
| Confusing asynchronous (GQ) with audio-only synchronous (modifier 93) | Audio-only visits still happen in real time; GQ specifically represents no real-time interaction at all |
| Submitting low-quality or non-diagnostic images and billing them as store-and-forward telehealth | The transmitted information has to be adequate, on its own, to support a real diagnostic or treatment decision |
| Using fax-transmitted images or unsecured text/email exchanges as the basis for a GQ claim | These transmission methods don't meet CMS's definition of qualifying asynchronous telehealth technology |
| Assuming GQ works the same way across every payer | Medicare's rule is narrowly restricted to Alaska/Hawaii demonstration programs; Medicaid and commercial payer policies vary and are often considerably broader |
| Billing a code not listed on the applicable telehealth-eligible code list | GQ can only be submitted with codes specifically designated as telehealth-eligible by the payer in question |
Best Practices for Billing the GQ Modifier
For accurate GQ modifier billing, confirm that the service qualifies for asynchronous store-and-forward telehealth and meets the patient, provider, and payer eligibility requirements. Verify coverage before submission, maintain complete supporting documentation, and follow current Medicare or payer-specific rules to minimize denials and compliance issues.
- Confirm which payer you’re billing before assuming GQ applies: Traditional Medicare’s rule is far narrower than most state Medicaid programs and commercial payers.
- Verify actual affiliation with an Alaska or Hawaii federal telemedicine demonstration program before billing GQ to traditional Medicare: Don’t rely on general store-and-forward eligibility assumptions.
- Use secure, clinically adequate transmission methods: Confirm images or data are specific to the patient’s condition and sufficient to support a genuine diagnostic decision, not a quick, informal exchange.
- Check the applicable telehealth-eligible code list before submitting a GQ claim: Codes not on that list aren’t eligible for the modifier regardless of how the service was delivered.
- Train staff on the asynchronous versus audio-only distinction clearly: These are easy to conflate, and the correct modifier, GQ versus 93, depends entirely on whether the interaction was real-time or not.
- Build payer-specific telehealth policy references into your billing workflow, especially for practices serving patients across multiple state Medicaid programs with differing store-and-forward coverage rules.
- Document practitioner eligibility clearly and keep it on file, since Medicare Administrative Contractors are explicitly permitted to request proof of demonstration program participation before paying a GQ claim.
Compliance Considerations
GQ carries a distinctly different compliance profile depending on the payer involved, which is exactly why it’s worth treating with extra care. For traditional Medicare fee-for-service claims specifically, the Alaska/Hawaii demonstration program restriction is a hard eligibility line, not a general guideline, and Medicare Administrative Contractors have explicit authority to request documentation and deny claims where that affiliation isn’t genuine.
For Medicaid and commercial claims, the compliance risk shifts toward accurately tracking each specific payer’s own store-and-forward policy, since coverage varies meaningfully by state and by plan. A practice billing across multiple payer types needs a clear, current reference for which payers actually recognize GQ, under what conditions, and for which service types, rather than applying a single, uniform assumption about how asynchronous telehealth billing works everywhere.
The safest approach treats GQ eligibility as payer-specific from the outset, confirming the relevant rule before billing rather than assuming consistency across Medicare, Medicaid, and commercial claims.
Why This Restriction Has Lasted So Long
It’s worth understanding why Medicare’s asynchronous telehealth rule has remained this narrow for so long, especially given how much telehealth policy broadened during and after the COVID-19 public health emergency. Most of Medicare’s major telehealth expansions during that period focused on synchronous services, loosening originating site restrictions, adding eligible codes, and permitting audio-only visits under modifier 93. Store-and-forward technology largely wasn’t part of that wave of expansion, and the underlying statutory limitation from the Balanced Budget Act of 1997 restricting asynchronous telehealth outside the Alaska and Hawaii demonstration programs has remained essentially unchanged.
That’s part of why GQ can feel like an outlier compared to the rest of the telehealth modifier family, most of which has become considerably more flexible over the past several years. Any future statutory change to Medicare’s asynchronous telehealth policy would need its own separate legislative action, distinct from the general telehealth flexibilities Congress and CMS have extended for synchronous services. Practices hoping GQ’s Medicare restriction might loosen simply because other telehealth rules have should treat that as a genuinely separate, unresolved policy question rather than an assumption to build billing decisions around.
Practical Steps for Multi-Payer Telehealth Practices
For practices that see a mix of Medicare, Medicaid, and commercial patients through an asynchronous care model, dermatology and ophthalmology practices especially, building a reliable payer-specific eligibility check into the front-end workflow avoids most GQ-related billing errors before they happen.
- Flag the patient’s payer type before the encounter is even scheduled, so staff know upfront whether GQ is potentially billable at all for that specific patient.
- Maintain a current reference table of which states’ Medicaid programs cover store-and-forward services, and under what conditions, since this landscape shifts as state policy changes.
- Separate practitioner credentialing records by demonstration program affiliation, for the specific subset of providers who do have a genuine Alaska or Hawaii connection, so that eligibility is documented clearly rather than assumed.
- Review commercial payer contracts specifically for telehealth and store-and-forward language, since coverage often isn’t obvious from a payer’s general telehealth policy summary alone.
Frequently Asked Questions About the GQ Modifier
What does the GQ modifier mean in medical billing?
GQ indicates that a telehealth service was delivered via an asynchronous, store-and-forward telecommunications system, where recorded patient information was transmitted to a distant site practitioner for review outside of a real-time interaction with the patient.
Can GQ be billed to traditional Medicare from anywhere in the country?
No, under traditional Medicare fee-for-service, GQ is restricted specifically to physicians and practitioners affiliated with a federal telemedicine demonstration program conducted in Alaska or Hawaii.
What's the difference between GQ and modifier 93?
Modifier 93 represents synchronous, real-time audio-only communication between the provider and patient. GQ represents asynchronous communication with no real-time interaction at all, the information is transmitted and reviewed separately in time.
Do phone calls or faxed images qualify as billable asynchronous telehealth under GQ?
No, CMS specifically excludes telephone calls, fax-transmitted images, and unsecured text or email exchanges without patient visualization from the definition of qualifying asynchronous telehealth technology.
Does the patient need to be present with the distant site practitioner during a store-and-forward review?
Generally, no, unless the distant site physician or practitioner determines that direct presence is medically necessary for that specific case.
Does GQ work the same way for Medicaid and commercial payers as it does for traditional Medicare?
No, Medicaid and commercial payer coverage of store-and-forward telehealth varies considerably by state and by plan, and is often significantly broader than traditional Medicare’s narrow Alaska/Hawaii demonstration program restriction. It’s important to verify the specific payer’s own policy.
What happens if I bill GQ to Medicare without a genuine Alaska or Hawaii demonstration program affiliation?
Medicare Administrative Contractors are directed to deny telehealth claims where the billing physician or practitioner isn’t actually eligible, and contractors may require documentation of demonstration program participation before paying a GQ-modified claim.
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