Telehealth Billing for Therapists: The Modifiers and Place-of-Service Codes You're Probably Getting Wrong

A claim goes out for a Tuesday afternoon session. Same client, same CPT code, same rate you've billed a hundred times. Two weeks later it comes back denied. Not for the therapy, but for a two-digit code that describes where the client happened to be sitting.

This is the quiet, expensive reality of telehealth billing codes for therapists. The clinical work didn't change when sessions moved to video. The paperwork did. And the paperwork is where independent practices lose money- not because the rules are complicated, exactly, but because they're inconsistent; they have changed twice since 2023. Almost nobody explains them the way an independent therapist actually needs to hear them.

This post breaks down the three things that determine whether a telehealth claim pays cleanly: the CPT code, the modifier, and the place-of-service code. Get one of the three wrong and the whole claim can bounce.

The Three Things That Determine A Telehealth Claim

Billing video sessions to insurance uses the same CPT codes you'd use in person — 90791 for intake, 90832/90834/90837 for individual psychotherapy, 90846/90847 for family or couples work. Telehealth doesn't require a separate set of codes for therapy. What changes is everything wrapped around that code:

- The modifier — a two-character add-on that tells the payer how the service was delivered (video, audio-only, or in person).

- The place-of-service (POS) code — a two-digit code that indicates where the client was during the session.

- The payer's own rules — because Medicare, Medicaid, and commercial insurers don't all interpret the first two the same way.

Most denials trace back to one of these three being wrong while the other two are fine. That's why the fix rarely means relearning your CPT codes. It means getting precise about modifiers and POS.

Modifier 95 Vs. Gt Vs. 93: What Each One Actually Signals

Three modifiers cover almost every telehealth scenario a therapist bills. Here's what each one means, where it applies, and where it trips people up:

1. Modifier 95 (synchronous Audio-Visual Care)

Modifier 95 mental health billing indicates a real-time, interactive audio and video encounter.

- When to use: This is the standard modifier for commercial plans (Optum, Aetna, Cigna, BCBS) when conducting standard video psychotherapy sessions (CPT 90834, 90837, 90832).

- Nuance: Some payers require Modifier 95 even when using POS 10 or POS 02, while others consider Modifier 95 redundant when a telehealth-specific POS code is present. Always verify individual payer preferences.

2. Modifier Gt (legacy Telehealth Modifier)

Historically, Modifier GT was the universal indicator for interactive audio-video telehealth.

- Where it stands now: Most commercial payers and Medicare have phased out GT in favor of 95 or modern POS codes. However, several state Medicaid programs, TRICARE regional contracts, and smaller local HMOs still require Modifier GT on claims. Using 95 instead of GT on these specific claims results in an instant rejection.

3. Modifiers For Audio-Only Sessions (93 Vs. Fq)

Not every client has reliable broadband or a private space for a video call. When a session must be conducted via traditional telephone audio due to technical failures or patient limitations, standard video codes with Modifier 95 will fail compliance audits.

- Modifier 93: Appended to commercial insurance claims for synchronous audio-only session, no video component.

- Modifier FQ: Used in specific Medicare billing situations to identify eligible behavioral or mental health services delivered via audio-only communication. Because Medicare telehealth billing requirements change periodically, always follow the latest CMS guidance before reporting modifier FQ.

Pos 10 Vs. Pos 02: The Mix-Up That's Quietly Costing You Claims

This is where most telehealth billing errors for therapists actually happen, and it's almost always the same error in the same direction.

Here's the part that trips practices up: POS 02 was the original telehealth place-of-service code, introduced years before POS 10 existed. A lot of practices set POS 02 as their default back when it was the only option, and never updated their system when POS 10 was added specifically to distinguish home-based visits. The result is claims that are technically miscoded even though nothing about the actual session was wrong, and depending on the payer, that mismatch either processes at the wrong rate or gets kicked back outright.

One more distinction worth being precise about: the POS code describes the client's location, not the therapist's. Where you were sitting when you logged into the session doesn't factor into which code you use.

The 4 Telehealth Billing Mistakes Therapists Make

Even seasoned clinicians make coding errors that create payment bottlenecks. Here are the four most common traps in place of service code telehealth therapy claims:

1. The "ehr Auto-Pilot" Default Error

Most EHR systems (like SimplePractice, TherapyNotes, or TherapyCampaign) require manual configuration for POS defaults. If your account was created years ago, it may be submitting every claim with POS 02 or POS 11. Over months of billing video sessions to insurance, this mismatch between session notes (which document a home visit) and claim codes leads to chronic underpayment or audit flags.

2. Double-Modifier Overkill

In an attempt to cover all bases, some practitioners append Modifier 95 and GT and FQ to a single line item. Clearinghouse adjudication systems view conflicting modifiers (e.g., mixing audio-video 95 with audio-only FQ) as corrupted data, leading to outright claim rejections that never reach the insurer.

3. Interstate Telehealth Licensing & Billing Violations

With virtual therapy, clients often log in while traveling for work or vacationing in another state.

- The Trap: Billing insurance for a session where the client was physically located in a state where you are not licensed (or not credentialed with that state's insurance network) violates both state licensing board regulations and payer contracts.

- The Fix: Always document the client's physical address at the start of every virtual session.

4. Assuming All Payers Follow Medicare Rules

Assuming payer-specific telehealth rules are uniform across the board is a costly error. Medicare may allow audio-only therapy under Modifier FQ with a documented 12-month prior in-person visit rule, while a commercial plan like Cigna might deny audio-only psychotherapy outright unless an explicit pre-authorization is attached.

A Simple Way To Check Your Own Claims

Before submitting a telehealth claim, three questions settle it:

- What CPT code describes the service? (Same as an in-person session — this rarely changes.)

- How was it delivered? Video → modifier 95 (or GT, if the payer requires it). Audio-only → modifier 93, and only if the payer covers it for that code.

- Where was the client? Home → POS 10. Anywhere else → POS 02.

If you can answer all three with confidence and your answer matches what that specific payer's current policy says, the claim is coded correctly. The part that takes ongoing attention isn't the framework — it's question three's dependency clause: what that specific payer's current policy says.

What This Looks Like When It's Not Your Job Anymore

Most independent therapists didn't go into this work to track CMS's annual telehealth list or keep a mental map of which Medicaid plan still wants GT instead of 95. That's reasonable — it's also exactly the kind of task that quietly eats evenings and gets claims denied when it's handled between sessions instead of as its own discipline.

This is the part of the practice The Bowerbirds' insurance billing and claims service runs directly: the correct modifier and POS code applied per payer, denials worked without you touching them, and a system that gets updated when a payer's policy changes instead of waiting for a denial to reveal it.

Stop Chasing Telehealth Billing Rule Changes

Understanding telehealth billing codes for therapists shouldn't require a second degree in health administration. Every hour spent checking modifier requirements, updating POS defaults, or appealing preventable denials is an hour you're not spending with clients or growing your practice.

If you'd rather have billing handled by a team that stays current on payer requirements, The Bowerbirds manages insurance billing, claim submission, denial follow-up, and ongoing payer updates for independent therapy practices.

Book a free 20-minute consultation to see whether outsourcing your billing makes sense for your practice.

Disclaimer: This article is for general informational purposes only and does not constitute billing, legal, or coding advice. Telehealth billing rules vary by payer, state, and license type, and change frequently — always verify current requirements with the specific payer, your state licensing board, or a qualified billing professional before submitting a claim.

Frequently Asked Questions

Is Telehealth Reimbursed At The Same Rate As In-Person?

It depends on the payer. Medicare generally reimburses covered telehealth services at the same physician fee schedule amount as comparable in-person services, although payment can vary based on factors such as the place-of-service code. Commercial insurers and Medicaid plans set their own reimbursement policies, so parity isn't guaranteed. Before assuming equal payment, verify your specific payer's telehealth reimbursement rules.

Can I See Out-Of-State Clients Via Telehealth?

Only if you're legally authorized to practice where the client is physically located during the session. Telehealth licensure rules vary by state, and some states allow practice through licensure compacts, temporary practice provisions, or special telehealth registrations. Even if your payer covers telehealth, you should confirm you're permitted to provide care in the client's state before the appointment.

What Modifier Do Therapists Use For Telehealth?

For most live audio-video psychotherapy sessions, commercial insurers commonly require modifier 95. Some Medicaid plans still use modifier GT, while modifier 93 is used for eligible audio-only services. The correct modifier ultimately depends on the payer's billing requirements, so it's important to verify their current policy before submitting a claim.

Can Therapists Bill Audio-Only Therapy?

Sometimes. Many payers, including Medicare for eligible behavioral and mental health telehealth services, cover certain audio-only visits, while others do not or impose additional requirements. When billing an eligible phone-only session, use the appropriate modifier (such as 93, if required by the payer) and confirm that both the CPT code and the insurance plan allow audio-only reimbursement.

Does Medicare Require Modifier 95?

Not always. Current Medicare billing guidance generally relies on the appropriate Place of Service (POS) code, such as POS 10 for services provided while the patient is at home or POS 02 when the patient is elsewhere, rather than requiring modifier 95 for most professional telehealth claims. However, billing rules can differ for certain provider types or institutional settings, so always follow the latest CMS guidance.

The Bowerbirds is a back-office team for independent therapists — billing, claims, scheduling, and books — flat $999/month, no contract. Book a 20-minute call at the-bowerbirds.com, email hello@the-bowerbirds.com, or call (951) 223-5782.

• How to Actually Enforce a No-Show Fee Policy Without Damaging the Therapeutic Relationship
  A therapy no-show fee policy only works if it's enforced consistently. Learn practical strategies to protect revenue while keeping the thera…
• SimplePractice vs. a Billing Service: What's the Actual Difference (And Which One Do You Need)?
  SimplePractice vs. billing service: Learn the key differences, pros, cons, and when your practice needs software alone or outsourced expert…
• How Long Insurance Credentialing Actually Takes for a New Private Practice (State-by-State Reality Check)
  How long does therapist credentialing take for private practices? Learn the standard 5-step pipeline, regional state timelines, and how to a…