The Definitive Guide to Telehealth Audio-Only Billing for Mental Health in 2026

Phone sessions saved behavioral health access during the pandemic. But four years later, the rules around billing them have become a minefield — and most therapists, LCSWs, LPCs, and psychiatrists are still navigating it with outdated information.

If you're billing audio-only telehealth services in 2026 and you're not 100% sure your claims are clean, this guide is for you. We're breaking down everything: the correct CPT codes, Medicare and Medicaid rules, major commercial payer policies, documentation requirements, and the compliance traps that are quietly generating audits right now.

Let's get into it.

Why Audio-Only Telehealth Still Matters in Behavioral Health

Let's be honest about who's calling in from a phone: it's your rural patients who don't have reliable broadband. It's your elderly clients who can't manage a video platform. It's your patients with severe depression or agoraphobia who would cancel entirely before turning on a camera. It's parents calling in during a lunch break who can't find a private space for video.

Audio-only telehealth isn't a lesser modality for behavioral health — for a significant slice of your patient population, it's the only modality that works. The clinical literature backs this up: studies show that telephone-delivered CBT and psychotherapy produce outcomes comparable to in-person care for depression, anxiety, and PTSD.

The problem isn't clinical. The problem is billing and documentation compliance — and that's exactly where practices are getting hurt.

The 2026 Regulatory Landscape: What's Changed

Here's the short version of where things stand heading into 2026:

Medicare: The Consolidated Appropriations Act extensions have continued to protect audio-only telehealth coverage through the current PHE extension period. As of 2026, Medicare continues to reimburse audio-only mental health services under specific conditions, but Congress has been debating permanent extension versus sunsetting these flexibilities. The key requirement: you must have an established relationship with the patient, and the patient must be unable to use video technology.

Medicaid: Highly variable by state. Most state Medicaid programs cover audio-only telehealth for behavioral health, but reimbursement rates, prior authorization requirements, and documentation rules differ dramatically. Some states (California, New York, Texas, Illinois) have enacted permanent audio-only telehealth parity laws. Others have not.

Commercial Payers: Parity laws in over 40 states now require that insurers cover telehealth services comparably to in-person — but "telehealth" definitions in those laws don't always include audio-only. This is where you get burned.

The bottom line: audio-only reimbursement is still available in 2026, but it requires payer-specific knowledge and airtight documentation.

Audio-Only CPT Codes for Mental Health in 2026

This is the section most practitioners need first. Let's go through the codes you'll actually use.

Telephone E/M Codes (for Psychiatrists and Prescribers)

These codes were originally designed for established patients calling in for a medical discussion. They're still valid for psychiatric medication management conducted by phone.

| CPT Code | Service Description | Time | Typical Medicare Rate (2026) | |----------|--------------------|---------|-----------------------------| | 99441 | Telephone E/M, physician/qualified provider | 5–10 min | ~$14–$18 | | 99442 | Telephone E/M, physician/qualified provider | 11–20 min | ~$28–$35 | | 99443 | Telephone E/M, physician/qualified provider | 21–30 min | ~$41–$52 |

Important: These codes are for established patients only. They cannot be billed if the call results in a service that is billed separately within 24 hours before or after, or within 7 days following.

Audio-Only Psychotherapy Codes

For licensed therapists (LPCs, LCSWs, LMFTs, psychologists) billing psychotherapy via phone, the standard psychotherapy CPT codes apply — billed with a modifier to indicate audio-only delivery.

| CPT Code | Service | Time | Typical Medicare Rate (2026) | |----------|---------|------|------------------------------| | 90832 | Psychotherapy | 16–37 min | ~$68–$80 | | 90834 | Psychotherapy | 38–52 min | ~$100–$115 | | 90837 | Psychotherapy | 53+ min | ~$145–$165 | | 90847 | Family psychotherapy (with patient) | 50 min | ~$120–$135 | | 90846 | Family psychotherapy (without patient) | 50 min | ~$110–$125 | | 90853 | Group psychotherapy | Per session | ~$35–$45 |

Rates are approximate and reflect 2026 Medicare Physician Fee Schedule national averages. Your actual rate will vary by locality.

The Critical Modifier Question: 93 vs. GT vs. 95

This trips up more practices than almost anything else in telehealth billing.

Modifier 95 — Synchronous telemedicine service rendered via real-time interactive audio and video. This is for video telehealth.
Modifier GT — Via interactive audio and video telecommunication systems. Used primarily for Medicare Part B, often interchangeable with 95 for video.
Modifier 93 — Synchronous telemedicine service rendered via telephone or other real-time interactive audio-only telecommunications system. This is your audio-only modifier.

For audio-only sessions in 2026: append Modifier 93 to your psychotherapy or E/M code.

For example: 90837-93

Without the correct modifier, your claim will likely be processed incorrectly — either denied or incorrectly bundled. Some commercial payers also require Place of Service (POS) code 02 (Telehealth provided other than in patient's home) or POS 10 (Telehealth provided in patient's home). Use POS 02 if the patient is calling from a location other than their home; POS 10 if they're at home. When in doubt, POS 10 is most common for behavioral health audio-only.

Payer-by-Payer Breakdown: What to Expect in 2026

Medicare

Medicare remains one of the more defined payers for audio-only telehealth, which is both good and bad. Good because you know the rules. Bad because the rules are genuinely restrictive.

Key Medicare requirements for audio-only mental health in 2026:

The patient must be unable to use video technology (you need to document this)
The patient must be an established patient (no audio-only for new patients under traditional Medicare)
Informed consent for audio-only must be documented — either verbal (noted in the chart) or written
The provider must be in an eligible telehealth originating site state (though geographic restrictions were largely waived through the current extension)
Modifier 93 must be appended

Medicare Advantage plans (administered by UnitedHealthcare, Humana, Aetna, BCBS) may have different and sometimes more flexible rules — always verify directly with the plan.

Medicaid

Medicaid is the wild card. Coverage and rates for audio-only behavioral health services vary by state.

States with strong audio-only coverage (as of 2026):

California (Medi-Cal) — robust audio-only coverage with parity
New York — permanent audio-only telehealth protections
Texas — covers audio-only for behavioral health through Managed Care Organizations (MCOs), but each MCO has different documentation rules
Illinois, Florida, Washington — generally favorable, verify MCO by MCO

What to watch: Many Medicaid beneficiaries are enrolled in MCO-managed plans (Molina, Centene/WellCare, Anthem, Aetna Better Health). These plans have their own credentialing, billing, and documentation requirements layered on top of state policy. Always get the specific MCO's telehealth billing guide — don't assume state policy flows directly down.

Commercial Payers

UnitedHealthcare: Generally covers audio-only behavioral health under telehealth benefits in states with parity laws. Requires Modifier 93 and POS 10. Verify each individual plan — fully-insured vs. self-funded plans have different rules.

Aetna: Covers audio-only for mental health and substance use disorder in most markets. Check their telehealth clinical policy bulletins, which are updated periodically.

Cigna/Evernorth: Covers audio-only psychotherapy in most states. Requires documentation that video was not available or feasible for the patient.

Anthem/BCBS plans: Varies significantly by regional plan. Some BlueCross plans still require a pre-existing video capability attestation before they'll pay for audio-only.

BCBS Federal Employee Program (FEP): Has maintained audio-only telehealth coverage — generally favorable for behavioral health.

The general commercial payer rule: If your state has a telehealth parity law that explicitly includes audio-only, you're in a stronger position. If the law only covers "synchronous audio-video" services, you may face denials and need to appeal.

Documentation Requirements: What You Must Capture

This is where the audits happen. A clean claim with poor documentation is a ticking clock.

Here's what your audio-only session notes need to contain in 2026:

1. Modality Statement Be explicit. Don't just write "telehealth session." Write: "Session conducted via telephone (audio-only). Patient was contacted at [phone number]. Patient confirmed identity and location at the start of the session."

2. Patient Inability/Preference for Audio-Only For Medicare especially, document WHY audio-only was used. Examples:

"Patient does not own a device capable of video communication."
"Patient's internet connection is insufficient for video telehealth."
"Patient expressed significant distress at the prospect of video-based sessions; audio-only clinically appropriate."

3. Informed Consent Document that the patient was informed about audio-only telehealth, its limitations, and that they consented. A single documented consent (noted in the intake or a separate consent form) that is referenced in subsequent notes is acceptable for most payers.

4. Patient Location / State Document the state the patient was calling from. This matters for licensure compliance — if your patient calls from a different state than your license covers, you may have a scope of practice issue. This is not just a billing concern; it's a legal one.

5. Time Documentation If you're billing time-based codes (which most psychotherapy codes are), document start time, end time, and total minutes. Specify that this is face-to-face (audio) time, exclusive of documentation and administrative time.

6. Medical Necessity Never neglect this. Your note must support why the patient needed the service. Audio-only doesn't change your medical necessity documentation burden — it just adds an additional layer of modality justification.

The Most Common Audio-Only Billing Mistakes (And How to Avoid Them)

Mistake #1: Using Modifier 95 for audio-only sessions. Modifier 95 is for audio-video telehealth. Using it for a phone session miscodes the claim. Some payers will pay it anyway, creating an overpayment liability. Others will deny. Neither outcome is good.

Mistake #2: Billing telephone E/M codes (99441-99443) when you should be billing psychotherapy codes. If you're a licensed therapist (not a prescriber), telephone E/M codes are typically not appropriate. Use psychotherapy codes with Modifier 93. If you're a psychiatrist doing a combined medication management + psychotherapy session, you may be able to bill the add-on psychotherapy code (90833, 90836, 90838) in addition to the E/M.

Mistake #3: Failing to document patient inability to use video. For Medicare, this is a hard requirement. Without it, you're vulnerable in an audit even if the claim paid.

Mistake #4: Billing audio-only for new patients without checking payer policy. Most payers — and Medicare explicitly — do not allow audio-only for new patient encounters. Conduct initial assessments via video or in-person, then transition to audio-only if appropriate.

Mistake #5: Assuming your EHR or billing software is selecting the right codes and modifiers. Technology helps, but it doesn't always account for the nuances of your specific payer mix, your state's rules, or the type of service rendered. Always verify.

Audio-Only vs. Video Telehealth: A Quick Comparison

| Factor | Audio-Only (Phone) | Video Telehealth | |--------|-------------------|------------------| | Primary CPT codes | 99441-99443, 90832-90837 + Mod 93 | 90832-90837 + Mod 95/GT | | Medicare new patients | Generally NOT covered | Covered | | Reimbursement rate | Often slightly lower | Typically same as in-person | | Documentation burden | Higher (must justify audio-only) | Standard telehealth documentation | | Patient access | Higher (phone universally available) | Requires device + internet | | Clinical suitability | Strong for established, stable patients | Preferred for new patients, complex cases | | Audit risk | Higher without proper documentation | Lower with standard documentation | | Payer parity | Variable by state and payer | Stronger across the board |

FAQ: Audio-Only Telehealth Billing for Mental Health 2026

Q1: Can I bill audio-only telehealth for a new patient in 2026?

Generally, no — not under Medicare. For traditional Medicare beneficiaries, audio-only services require an established patient relationship. Most commercial payers follow a similar policy. If you're seeing a new patient, conduct the initial evaluation via video or in-person, then transition to audio-only if clinically appropriate and payer-approved.

Q2: Do I need a separate informed consent for audio-only telehealth versus video telehealth?

Not necessarily a separate form, but your consent documentation should clearly address audio-only services, including the limitations (e.g., inability to observe nonverbal cues). Many practices include both modalities in a single telehealth consent form — that's fine, as long as it's specific and documented in the chart.

Q3: My state has a telehealth parity law. Does that mean all payers have to cover my phone sessions?

Not automatically. Parity laws in many states cover "interactive audio-video" services and may not explicitly include audio-only. Check your state's specific parity law language. States like California, Colorado, and New York have explicitly included audio-only; others have not. Even in parity states, self-funded ERISA plans may be exempt from state insurance laws.

Q4: What's the reimbursement difference between audio-only and video telehealth?

For most payers in 2026, audio-only mental health services reimburse at a lower rate than video telehealth, which typically reimburses at parity with in-person care. The gap varies by payer and code. Under Medicare, some audio-only codes (particularly the telephone E/M codes 99441-99443) are notoriously low — under $50 even for 20+ minute calls. Video psychotherapy codes, by contrast, pay at full in-person rates. This is a real revenue consideration when your patient population can use either modality.

Q5: If a video session drops to audio-only mid-session due to technical issues, how do I bill it?

This is a common real-world situation. If the majority of the session was conducted via video, bill it as a video telehealth service. If the session was predominantly audio-only, bill accordingly. Document what happened in your note: "Session initiated via video; technical difficulties resulted in transition to audio-only at approximately [time]. Remainder of session conducted via telephone." Some payers have specific guidance on this — check with your top commercial payers directly.

Q6: Can group therapy be billed as audio-only?

Yes, in most cases. CPT 90853 (group psychotherapy) can be billed with Modifier 93 for audio-only delivery. However, group audio-only therapy presents unique documentation challenges — you'll need to document each participant and their consent to the audio-only format. Some payers require a minimum participant threshold to be documented as well.

Q7: How long do I need to keep audio-only telehealth documentation for audit purposes?

At minimum, follow your state's medical records retention law (typically 7–10 years for adults, longer for minors). For Medicare, a 7-year retention standard is a solid compliance benchmark. Given the increased scrutiny on telehealth claims, many practices are moving to indefinite digital retention given low storage costs.

How Mozu Health Helps You Stay Compliant and Get Paid

If you've made it this far, you understand the complexity. Audio-only telehealth billing in 2026 isn't hard if you have the right system in place — but it's absolutely unforgiving if you don't.

Mozu Health is an AI-powered clinical documentation platform built specifically for behavioral health providers — therapists, psychiatrists, LPCs, LCSWs, LMFTs, and group practices. Here's how Mozu makes audio-only telehealth billing more manageable:

Smart Documentation Templates — Mozu's behavioral health templates automatically prompt you for modality-specific documentation requirements, including audio-only justification language, consent notation, and time capture for time-based codes.
Billing Code Accuracy — Mozu helps ensure the right CPT codes and modifiers are mapped to the right service type, reducing the risk of Modifier 93 vs. 95 errors and incorrect code selection.
Audit Defense Documentation — Every note generated through Mozu is structured for audit readiness: medical necessity language, session time documentation, and payer-specific compliance language baked in.
HIPAA-Compliant and Secure — All documentation is stored in a fully HIPAA-compliant environment, with audit trails that protect your practice in the event of a payer review.
Built for Group Practices — Whether you're a solo LPC or a 50-provider group practice, Mozu scales with you and keeps your entire team's documentation consistent and compliant.

Audio-only telehealth isn't going away. Neither is payer scrutiny. The practices that thrive are the ones that have systems — not just knowledge — keeping them compliant.

Ready to protect your telehealth revenue and documentation integrity?

Try Mozu Health free today →

Join behavioral health providers across the country who are using Mozu to document faster, bill more accurately, and sleep better at night knowing their charts are audit-ready.

This article is intended for educational purposes and reflects billing guidance as of early 2026. Payer policies change frequently. Always verify current requirements directly with individual payers and consult a qualified healthcare billing professional for guidance specific to your practice.

Telehealth Audio-Only Billing for Mental Health 2026