Understanding Mental Health CPT® Codes for Psychotherapy
The American Medical Association (AMA) maintains the Current Procedural Terminology (CPT®) code set, which we billing folks use to describe the medical services provided to patients. These codes act as a universal language, which makes it easier for doctors, insurance companies, administrators, and regulators to communicate about the services patients receive (American Academy of Professional Coders [AAPC], 2025).
When used correctly, CPT® codes provide data for delivering, paying for, and monitoring healthcare. When used incorrectly, these codes can cost clinicians time, money, and peace of mind. CPT® codes exist to support insurance reimbursement for psychotherapy services; the coding is what turns clinical work into a claim for services and, hopefully, a payment from the insurance company (Centers for Medicare & Medicaid Services, 2026).
Intake Sessions (90791)
Every course of psychotherapy treatment starts somewhere, and that somewhere has its own code.
90791: Intake Session
An intake session is “a psychiatric diagnostic evaluation without medical services” (Centers for Medicare & Medicaid Services, 2026). There's no set time attached to this code, but many practices run these at around 55 minutes (Williams, 2026). Billing frequency for this code varies by payer, and Medicare generally allows it once per client per year, while private insurers may allow it as often as every six months (Judge, 2024).
Individual Psychotherapy Sessions
Codes 90832 through 90838 cover individual psychotherapy services and refer to face-to-face service with the diagnosed client, who must be present for all or a majority of the session (American Medical Billing Association [AMBA], 2025).
90832 — 16–37 minutes
90833 — 16–37 minutes, performed with an Evaluation & Management (E/M) service
90834 — 38–52 minutes
90836 — 38–52 minutes, performed with an E/M service
90837 — 53 or more minutes
90838— 53 or more minutes, performed with an E/M service
A few practical notes worth sitting with:
There's a hard floor and a soft ceiling worth knowing here. A session of 15 minutes or less isn't billable at all; the clock has to clear 16 minutes before insurance will recognize it as a reportable service (Centers for Medicare & Medicaid Services, 2026). On the other end, there's no bracket above 90837. Run a session for 75 minutes, 90 minutes, or longer, and it's still filed under the same "53 minutes or more" code as a standard extended session (AMBA, 2025).
When reporting, choose the code closest to the actual session time (Centers for Medicare & Medicaid Services, 2026). It's also worth knowing that 90837 is often viewed by payers as a “non-routine code,” and may require more thorough justification in the corresponding progress note (Alma, n.d.; Boudin, 2022).
Group Therapy
90853: Group Therapy
There's no fixed roster size for this code; the CPT definition sets the floor at two participants, but the ceiling is left open (Centers for Medicare & Medicaid Services, 2026). A handful of insurers draw the line at eight people, though the majority leave group size unaddressed entirely; one more reason to check the specific payer's contract or call to verify rather than lean on a rule of thumb (Williams, 2026).
Family Sessions
Family psychotherapy has its own set of codes, and they come with their own set of caveats.
90847: Session with Client and Family
Rather than centering the individual, this code shifts the billed focus onto family dynamics and relational patterns, even though the identified and diagnosed client remains the intended beneficiary of care (American Psychological Association Services, n.d.). Where this gets murky is couples work: the field hasn't settled on whether an ongoing couple counts as a "family" for coding purposes (Williams, 2026). If couples sit in your caseload regularly, don't inherit a default answer from another practice; call your specific payers to discover how they treat it and set your own policy deliberately.
90846: Session with Family (Without Client)
Expect more pushback on this one. Payers deny it more often than other family codes, and a number of plans exclude it from coverage altogether (Williams, 2026). That said, many practices still list it on their fee schedule and bill it when it applies; the key is setting expectations before the session, not after the denial. Let families know upfront that reimbursement isn't guaranteed, and have a private-pay rate ready as a fallback so nobody's caught off guard by a bill they didn't see coming.
For both 90846 and 90847, sessions run 50 minutes, with a 26-minute minimum; don't report either code for family psychotherapy services less than 26 minutes (Centers for Medicare & Medicaid Services, 2026).
It's also worth noting that codes 90832, 90833, 90834, 90836, 90837, and 90838 may be reported on the same day as 90846 or 90847, but only when the services are genuinely separate and distinct; billing both without that separation is a fast way to invite a denial (Centers for Medicare & Medicaid Services, 2026).
Why CPT Codes Matter in Mental Health Billing
CPT codes can feel like a technical afterthought to the real work of therapy, but they aren't. Every code you choose is a claim about what actually happened in the room: how long the session ran, who was present, and what kind of service was delivered. Get the code wrong, and even excellent clinical work can turn into a denied claim, a delayed payment, or an audit flag. Get it right, and the coding becomes what it's supposed to be: an accurate translation of your work into a language insurance companies will reimburse. That way, you get paid, and your client receives coverage.
Frequently Asked Questions
What's the difference between CPT codes 90832, 90834, and 90837?
All three describe individual, face-to-face psychotherapy; the only real difference between them is time. 90832 covers 16–37 minutes, 90834 covers 38–52 minutes, and 90837 covers 53 minutes or more (Centers for Medicare & Medicaid Services, 2026). Because these are time-based codes, the one you bill has to match your documented session length, not your scheduled appointment slot.
In other words, the times you note in the progress note for the session need to match the time-based code, as insurance companies audit the progress note (medical record), not the appointment time listed in the practice management system (LegalClarity, 2026).
Can I bill 90837 for every session?
You can, but keep in mind that you need to document in your progress note justification for the session length (Boudin, 2022). Payers tend to treat 90837 as the exception rather than the rule, and reaching for it out of habit (rather than because a session genuinely “ran long”) is a known way to end up on an insurer's review list (Alma, n.d.; Boudin, 2022).
When an extended session is clinically warranted, note the reasoning in your chart; a line or two on why the extra time mattered gives the claim something to stand on if it's ever questioned (Alma, 2026).
What CPT code do I use for a 75-minute session?
90837; the same code you'd use for a 53-minute session (AMBA, 2025). There's no separate bracket for longer visits; once you cross the 53-minute mark, everything above it falls into that one code (Centers for Medicare & Medicaid Services, 2026). If your sessions routinely run this long, build the habit of documenting why each time, since extended sessions draw more attention from reviewers (Alma, n.d.; Boudin, 2022).
Can I bill for a session that's 15 minutes or shorter?
No. Insurance doesn't recognize psychotherapy sessions under 16 minutes as billable, regardless of what happened clinically during that time (Centers for Medicare & Medicaid Services, 2026).
What's the difference between 90846 and 90847?
90847 is billed when the client is present along with family; 90846 is billed for a family session without the client there (American Psychological Association Services, n.d.). Both are built around a 50-minute session with a 26-minute minimum, and neither should be reported for shorter sessions (Centers for Medicare & Medicaid Services, 2026). 90846 tends to face more scrutiny from payers, so it's worth confirming coverage and setting client expectations before you rely on it.
Can I use 90847 for couples therapy?
This is genuinely contested (Williams, 2026). Some practices use 90847 for ongoing couples work; others avoid it, since the code was written with family treatment in mind rather than a couple functioning as the identified client (Williams, 2026). There's no universal answer here, so if couples work is part of your practice, it's worth researching payer-specific guidance and deciding deliberately, rather than defaulting into a habit.
How often can I bill 90791?
It depends on the payer. Medicare generally allows one intake evaluation per client per year, while private insurers may allow it more often, sometimes every six months (Boudin, 2022). There's no fixed CPT rule that applies across the board, so this is one to verify with each client's specific plan rather than assume.
Is there a minimum group size for CPT code 90853?
Two, technically. That's the floor CPT sets for what counts as a group (Centers for Medicare & Medicaid Services, 2026). A ceiling isn't universal, though some payers cap it around eight; confirm with each insurer rather than assuming their policy matches the last one you checked (Williams, 2026).
References
Alma. (n.d.). Psychotherapy CPT codes: 90832, 90834, 90837, 90846, 90847.https://helloalma.com/for-providers/resources/cpt-codes-for-psychotherapy/
American Psychological Association Services. (n.d.). Psychotherapy services frequently asked questions. APA Services. https://www.apaservices.org/practice/reimbursement/health-codes/psychotherapy-services-faq
Boudin, M. (2022, January 2). Most common CPT codes for psychotherapy. https://www.choosingtherapy.com/cpt-codes-for-psychotherapy/
American Academy of Professional Coders. (2025). Coding and medical necessity [Online course]. In Medical billing training: Certified professional biller (CPB)®. Coursera. https://www.coursera.org/learn/cbp-coding-medical
American Medical Billing Association. (2025). Mental health billing [Online course]. https://www.americanmedicalbillingassociation.com/mental-health-billing-course/
Centers for Medicare & Medicaid Services. (2026, January 1). Billing and coding: Psychiatry and psychology services (A57480). Medicare Coverage Database. https://www.cms.gov/medicare-coverage-database/view/article.aspx?articleId=57480
Judge, L. (2024, May 27). The complete guide to CPT codes for therapists. Heard. https://www.joinheard.com/articles/the-complete-guide-to-cpt-codes-for-therapists
LegalClarity. (2026, May 14). Psychotherapy billing codes, claims, and filing rules.https://legalclarity.org/psychotherapy-billing-codes-claims-and-filing-rules/
Williams, J. (2026). Insurance crash course for clinicians [On-demand webinar]. Mental Health Masterminds. https://mhmm.learnworlds.com/course/insurance-10
Educational Disclaimer
The information provided in this blog is intended for educational and informational purposes only and reflects general mental health billing guidelines and industry best practices available at the time of publication. SteadyStream Billing makes every reasonable effort to ensure the accuracy and reliability of the information presented; however, billing requirements, payer policies, regulations, and coding guidelines may change over time.
Readers are responsible for verifying current payer requirements, applicable regulations, and practice-specific guidelines before making billing, coding, or compliance decisions. SteadyStream Billing does not guarantee that the information provided is applicable to every individual practice, payer, or clinical situation.
This content is not intended to replace official payer guidance, legal advice, compliance consultation, or professional billing services. Providers remain responsible for ensuring their own compliance with applicable healthcare regulations and payer requirements.
CPT® is a registered trademark of the American Medical Association.
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