Mental Health Billing: A Complete Guide for Therapists and Psychiatrists

Most therapists and psychiatrists did not go into practice to argue with insurance companies. Yet for many private practices, group practices, and behavioral health clinics, billing has quietly become one of the biggest sources of stress, lost time, and lost revenue.

Claims come back denied because a session ran 52 minutes instead of 53. A telehealth visit is rejected for the wrong modifier. A new clinician sees patients for weeks before anyone notices they were never credentialed with the plan. Each problem looks small on its own. Together, however, they can drain thousands of dollars a month from a practice.

That is why mental health billing deserves its own playbook. Behavioral health has unique CPT codes, time-based rules, telehealth requirements, authorization patterns, and privacy concerns that general medical billing does not always handle well.

In this guide, we’ll explain how mental health billing works, which psychotherapy CPT codes therapists and psychiatrists use most, how to bill telehealth correctly in 2026, why claims get denied, and how to build a cleaner, faster revenue cycle for your practice.

>> What Is Mental Health Billing?

Mental health billing is the process of submitting claims to insurance companies, Medicare, and Medicaid for behavioral health services, and then following those claims until they are paid. It is also called behavioral health billing or psychotherapy billing.

In simple terms, every session a clinician provides must be translated into a procedure code (CPT), linked to a diagnosis code (ICD-10), checked against the patient’s coverage, and sent to the right payer in the right format. If any piece is missing or inconsistent, the claim is delayed, reduced, or denied.

A complete mental health billing workflow usually includes:

• • Insurance eligibility and benefits verification

• • Patient intake and demographic accuracy

• • Prior authorization and session limit tracking

• • CPT and ICD-10 coding

• • Charge entry and claim scrubbing

• • Claim submission through a clearinghouse

• • Payment posting and ERA reconciliation

• • Denial management and appeals

• • Accounts receivable (A/R) follow-up

• • Patient statements and copay collection

• • Credentialing and payer enrollment

Each step matters. Therefore, a small error at the front desk can turn into a denial weeks later in A/R.

>> Why Is Mental Health Billing Different From Medical Billing?

Many practices assume that any medical billing company can handle behavioral health. In reality, mental health billing has several features that make it more complicated than a typical primary care or specialty claim.

¤ Time-Based Psychotherapy Codes

Unlike many medical visits, most psychotherapy codes are billed by time. The exact number of minutes documented in the note decides which code is correct. As a result, a few minutes can change both the code and the payment.

¤ High Visit Volume With Lower Claim Values

A therapist may see 25 to 35 patients a week, often weekly or biweekly. Each claim is relatively small, but the volume is high. Consequently, even a 5% denial rate creates a large pile of rework every month.

¤ Separate Behavioral Health Plans

Many health plans “carve out” mental health benefits to a separate behavioral health administrator. In other words, the card in the patient’s wallet may list one company while claims must go to another. Billing the wrong entity is one of the most common reasons for early rejections.

¤ Authorization and Session Limits

Some plans require pre-authorization for psychological testing, intensive outpatient programs, or sessions beyond a set number. Others review medical necessity after a certain number of visits. Without tracking, practices keep seeing patients after the authorization has expired.

¤ Extra Privacy Sensitivity

Mental health records are highly sensitive. Psychotherapy notes have special protection under the HIPAA Privacy Rule, so billing teams must share only the minimum information needed to get claims paid. Learn more about how Evocare protects patient data on our HIPAA compliance page.

>> Most Common Mental Health CPT Codes for 2026

Mental health CPT codes are five-digit codes published by the American Medical Association (AMA). They describe what service was provided. Below are the codes therapists and psychiatrists use most often.

¤ Diagnostic Evaluation Codes

In most cases, 90791 or 90792 is billed for the first visit. After that, ongoing sessions move to psychotherapy or E/M codes. Many payers limit how often an intake code can be billed for the same patient, so check the plan’s policy before billing it again.

¤ Individual Psychotherapy Codes

These three codes are the backbone of therapy billing. For example, a 50-minute session should be billed as CPT 90834, not 90837. Likewise, CPT 90837 requires at least 53 minutes of documented face-to-face psychotherapy time.

Because 90837 pays more, some payers watch it closely. That does not mean you should avoid it. Instead, make sure start and stop times (or total minutes) are clearly written in every note.

¤ Psychotherapy Add-On Codes for Psychiatrists and Prescribers

When a psychiatrist or prescribing clinician provides an evaluation and management (E/M) visit and psychotherapy on the same day, the psychotherapy is billed with an add-on code:

Here is the key rule: the time spent on the E/M portion (medication management, review of symptoms, decision-making) cannot be counted again toward psychotherapy time. Therefore, documentation should clearly separate the two services.

¤ Family, Group, and Crisis Codes

For a full list of behavioral health codes and descriptors, you can browse the AAPC psychiatry CPT code range (90785–90899).

>> Common ICD-10 Codes Used in Mental Health Billing

Every CPT code must be supported by a diagnosis. In behavioral health, those diagnoses come from the F-chapter of ICD-10-CM. If you are new to diagnosis coding, our guide on ICD-10 codes explained is a helpful starting point.

As a best practice, code to the highest level of specificity the documentation supports. Unspecified codes are sometimes acceptable, but they can trigger medical necessity reviews. You can find official code updates on the CDC ICD-10-CM page.

>> How to Bill Telehealth for Mental Health Services in 2026

Telehealth is now a permanent part of behavioral health care. However, telehealth billing for mental health still depends on getting three details right: the place of service, the modifier, and the payer’s rules.

¤ Place of Service (POS) Codes

• • POS 10 → Telehealth provided in the patient’s home

• • POS 02 → Telehealth provided somewhere other than the patient’s home

• • POS 11 → In-person office visit (some payers still ask for POS 11 with a telehealth modifier)

¤ Telehealth Modifiers

• • Modifier 95 → Synchronous audio-video telehealth

• • Modifier 93 → Audio-only telehealth, where the payer allows it

• • Modifier FQ → Audio-only services in certain Medicare settings, such as RHCs and FQHCs

Not every payer follows the same rule. For instance, one commercial plan may want POS 10 with no modifier, while another wants POS 11 with modifier 95. That is why a payer-by-payer telehealth grid is so valuable.

¤ Medicare Telehealth Rules for Behavioral Health

Medicare now permanently covers behavioral health telehealth delivered to patients in their homes, with no rural location requirement. In addition, legislation passed in early 2026 continued the waiver of the in-person visit requirement for behavioral telehealth through December 31, 2027. You can review the current rules on the HHS Medicare telehealth payment policies page.

For a wider look at 2026 Medicare changes, see the CMS CY 2026 Physician Fee Schedule fact sheet and our own breakdown of the CY 2026 Physician Fee Schedule final rule.

>> Credentialing: The First Step to Getting Paid

Before a therapist or psychiatrist can bill an insurance plan as in-network, they must be credentialed and contracted with that payer. Unfortunately, this step is often rushed or overlooked.

A typical credentialing process includes:

• • Getting an individual (Type 1) and, for groups, an organizational (Type 2) NPI through NPPES

• • Creating and maintaining a CAQH ProView profile

• • Submitting applications to each commercial payer and behavioral health plan

• • Enrolling in Medicare and state Medicaid where applicable

• • Linking each clinician to the group’s tax ID and service locations

• • Tracking re-credentialing dates and license renewals

Since January 1, 2024, Medicare also allows licensed marriage and family therapists (LMFTs) and mental health counselors (including LPCs) to enroll and bill directly. As a result, many counseling practices can now serve Medicare patients for the first time.

Credentialing can take anywhere from 60 to 120 days, or longer. Therefore, starting early is essential. Evocare’s credentialing services handle applications, follow-up, and CAQH upkeep so new clinicians can start billing sooner.

>> Step-by-Step Mental Health Billing Process

A clean billing process follows the same steps for every patient, every time. Here is what that looks like in practice.

¤ 1. Verify Insurance Before the First Session

Confirm active coverage, behavioral health benefits, the correct claims address or payer ID, copay or coinsurance, deductible status, visit limits, and whether authorization is required. Re-verify at least monthly and whenever a patient’s plan changes.

¤ 2. Obtain Authorizations When Required

Record the authorization number, approved CPT codes, number of visits, and expiration date. Then set reminders before the authorization runs out.

¤ 3. Document to Support the Code

Each note should include the session date, start and stop times or total minutes, modality (in-person, video, or audio-only), the diagnosis, the interventions used, and the patient’s progress toward treatment goals.

¤ 4. Code and Scrub the Claim

Match the CPT code to the documented time, link it to the correct ICD-10 code, add any needed modifiers, and check for missing data before submission.

¤ 5. Submit Claims Promptly

Send claims within 24 to 72 hours of the session. Timely filing limits vary by payer, sometimes as short as 90 days, so delays can permanently cost revenue.

¤ 6. Post Payments and Review ERAs

Post every payment and adjustment. Meanwhile, compare what was paid against your contracted rates to catch underpayments early.

¤ 7. Work Denials and Follow Up on A/R

Correct and resubmit rejections quickly, appeal unfair denials, and follow up on unpaid claims at 30, 60, and 90 days. Strong A/R management prevents small balances from becoming write-offs.

¤ 8. Bill Patients Clearly

Collect copays at the time of service where possible. After that, send clear statements for remaining balances, and offer easy online payment options.

>> Top Reasons Mental Health Claims Get Denied

Most denials are preventable. In our experience, the same issues appear again and again in behavioral health practices:

• • Billing the medical plan instead of the behavioral health carve-out

• • Session time that does not match the CPT code (for example, 90837 billed for a 50-minute visit)

• • Missing or wrong telehealth modifier or place of service

• • Expired or missing prior authorization

• • Clinician not credentialed, or not linked to the group with that payer

• • Billing 90791 and a psychotherapy code on the same day for the same patient

• • Using an unspecified diagnosis without supporting documentation

• • Duplicate claims or late (timely filing) submissions

• • Incorrect patient demographics or subscriber information

The goal is not just to fix each denial. Instead, a good billing team looks for patterns and fixes the root cause, so the same denial stops coming back.

>> Mental Health Billing Best Practices to Get Paid Faster

¤ Track the Right KPIs

Measure your billing, don’t guess. Important metrics include:

Clean Claim Rate → Denial Rate → Days in A/R → Net Collection Rate → Aging A/R Over 90 Days → Patient Collections

Regular analytics and reporting make it much easier to spot problems before they hurt cash flow.

¤ Build a Payer Rules Sheet

Keep one simple document listing each payer’s telehealth rules, authorization requirements, visit limits, timely filing deadlines, and claims address. As a result, your team won’t rely on memory.

¤ Use EHR Templates That Capture Time

Templates that require start and stop times reduce coding errors. If you use SimplePractice, TherapyNotes, Valant, AdvancedMD, or another system, check our list of EHRs we support.

¤ Know Your Parity Rights

Under the Mental Health Parity and Addiction Equity Act, many health plans cannot apply stricter limits to mental health benefits than to medical benefits. Read more on the CMS mental health parity page. This can be useful when appealing unreasonable visit limits or denials.

¤ Keep One Billing Team Accountable

Splitting billing between several people or vendors often creates gaps. In fact, we explain the risks in detail in why using two billing teams at once can hurt your revenue flow.

>> In-House vs. Outsourced Mental Health Billing

Some practices keep billing in-house; others outsource it. There is no single right answer.

In-House Billing May Work When:

You have an experienced behavioral health biller, stable staffing, low denial rates, and enough time to manage credentialing, authorizations, and A/R follow-up.

Outsourcing May Make Sense When:

Denials are rising, A/R is growing, clinicians are spending evenings on billing, or the practice is adding new providers and locations. A specialized partner can bring behavioral health expertise without the cost of hiring and training. For a full comparison, read our guide on medical billing outsourcing benefits, costs, and risks.

>> Why Choose Evocare for Mental Health Billing?

Evocare Billings & IT Solutions provides mental health billing services for therapists, psychologists, psychiatrists, counselors, and behavioral health groups across the United States.

Our team understands time-based psychotherapy codes, telehealth rules, behavioral health carve-outs, and the authorization requirements that cause most mental health denials. Rather than just submitting claims, we manage the full revenue cycle:

• • Eligibility and benefits verification

• • Prior authorization tracking

• • Accurate CPT and ICD-10 coding

• • Claim submission and denial management

• • A/R follow-up and appeals

• • Credentialing and payer enrollment

• • Clear monthly performance reporting

As a result, clinicians can spend less time on paperwork and more time with patients. Learn more about our complete revenue cycle management services.

>> Final Verdict

Mental health billing is not just “medical billing with different codes.” It requires careful time documentation, correct telehealth coding, up-to-date credentialing, and close tracking of authorizations and payer rules.

The good news is that most revenue problems in behavioral health are fixable. With accurate coding, clean claims, consistent follow-up, and the right KPIs, therapists and psychiatrists can get paid faster and with far less stress.

If your practice is dealing with denied claims, growing A/R, or credentialing delays, Evocare Billings & IT Solutions can help.

Contact Evocare today or book a free demo to see how we can improve your mental health billing and collections.

Email: info@evocarebillings.com
Phone: (323) 412-5399
Website: https://www.evocarebillings.com/

>> Frequently Asked Questions About Mental Health Billing

What is mental health billing?

Mental health billing is the process of coding, submitting, and following up on insurance claims for behavioral health services such as therapy, psychiatric evaluations, and medication management, so that therapists and psychiatrists are paid correctly by insurance companies, Medicare, and Medicaid.

What is the difference between CPT 90834 and 90837?

CPT 90834 is billed for individual psychotherapy lasting 38 to 52 minutes, while CPT 90837 is billed for sessions lasting 53 minutes or more. The documented session time decides which code is correct.

Can therapists bill 90791 and 90837 on the same day?

Generally, no. Most payers do not allow a psychiatric diagnostic evaluation (90791) and an individual psychotherapy code to be billed for the same patient on the same day by the same provider.

What modifier is used for mental health telehealth?

Modifier 95 is commonly used for audio-video telehealth, and modifier 93 for audio-only services where allowed. Place of service 10 is used when the patient is at home and 02 when they are elsewhere, but rules vary by payer.

Can LPCs and LMFTs bill Medicare?

Yes. Since January 1, 2024, licensed marriage and family therapists and mental health counselors, including LPCs, can enroll in Medicare and bill for covered services.

How long does mental health credentialing take?

Credentialing usually takes 60 to 120 days per payer, although some plans take longer. Starting early and keeping your CAQH profile current helps avoid delays.

Should I outsource mental health billing?

Outsourcing can make sense if your practice has rising denials, growing A/R, staffing gaps, or clinicians spending too much time on billing. A specialized mental health billing company brings coding, credentialing, and follow-up expertise without the cost of an in-house team.