If you run a behavioral health practice, you already know that one wrong code can hold up payment for weeks. CPT code 90837 is one of the most used and most scrutinized codes in mental health billing, and getting it right matters for your revenue, your documentation, and your peace of mind. This guide breaks down what 90837 actually means, when to use it, how to document it cleanly, and the small details that often trip providers up during payer reviews.
What Is CPT Code 90837?
CPT code 90837 is the procedure code used to report a 60-minute individual psychotherapy session with a patient. It belongs to the family of psychotherapy codes maintained by the American Medical Association and is one of the most frequently billed services in outpatient mental health care.
In simple terms, 90837 tells the payer that a licensed mental health professional delivered roughly an hour of face-to-face or telehealth-based therapy to one patient. The session must be medically necessary, properly documented, and tied to a valid diagnosis.
Also Read: ICD-10 Codes For Depression: Complete Billing Guide
Quick facts about CPT 90837:
- It is a timed code based on the face-to-face therapy time
- It is used for individual sessions, not family or group therapy
- It can be billed in-person or via telehealth with the correct modifier
- It is a standalone code, not an add-on code
CPT Code 90837 Time Range and Description
Time is the single biggest factor in choosing between psychotherapy codes. CPT guidelines use a midpoint rule, which means the session must reach at least the halfway mark of the code’s time range to qualify.
Here is the simple breakdown for individual therapy codes:
| CPT Code | Service | Time Range | Typical Use |
| 90832 | Psychotherapy, 30 minutes | 16 to 37 minutes | Brief individual session |
| 90834 | Psychotherapy, 45 minutes | 38 to 52 minutes | Standard session |
| 90837 | Psychotherapy, 60 minutes | 53 minutes or more | Extended individual session |
So if your clinician spends 53 minutes or more in direct therapy time with the patient, 90837 is generally the correct code. Anything less drops you into 90834 territory.
Time should reflect actual therapy delivery only. It does not include note writing, scheduling, billing tasks, or any time spent without the patient.
Who Can Bill CPT Code 90837?
CPT 90837 is reserved for qualified mental and behavioral health professionals working within their scope of practice and state licensure. This typically includes:
- Psychiatrists and psychiatric nurse practitioners
- Licensed psychologists
- Licensed clinical social workers (LCSWs)
- Licensed professional counselors (LPCs) and licensed mental health counselors (LMHCs)
- Licensed marriage and family therapists (LMFTs)
Coverage rules vary by payer and state. Some Medicaid plans recognize a narrower group of providers, and certain commercial insurers require credentialed status before they reimburse 90837 at the contracted rate.
CPT 90834 vs 90837: How to Choose the Right Code
The 90834 vs 90837 question shows up daily in mental health billing. Both report individual psychotherapy, but the difference comes down to session length and medical necessity.
| Factor | 90834 | 90837 |
| Time | 38 to 52 minutes | 53 minutes or more |
| Typical session length | 45 minutes | 60 minutes |
| Documentation depth | Standard | Often higher scrutiny |
| Audit risk | Lower | Higher when overused |
| Reimbursement | Lower | Higher |
Many payers track 90837 utilization closely. If a provider bills 90837 for nearly every session, payers may request notes to confirm the time and clinical necessity. Mixing 90834 and 90837 based on real session length is healthier for both compliance and revenue.
Documentation Requirements for CPT 90837
Clean documentation is what protects a 90837 claim during audits. Insurers do not just want to see “60-minute session” written in the note. They want context, clinical reasoning, and time tracking.
Strong CPT 90837 documentation usually includes:
- Start and stop times of the therapy session
- Total face-to-face time in minutes
- Therapeutic approach used, such as CBT, DBT, EMDR, or psychodynamic therapy
- Patient presentation, mood, and key symptoms discussed
- Progress toward treatment goals
- Interventions delivered during the session
- Clinical reasoning for why a 60-minute session was needed
- Plan for the next session
Notes should be written soon after the session, signed by the rendering provider, and stored in a HIPAA-compliant system. At Zee Medical Billing LLC, we often see denials tied to vague notes or missing time stamps, even when the session itself was clinically appropriate.
CPT 90837 and Telehealth Billing
Telehealth is now a permanent part of mental health care. CPT 90837 can be billed for virtual sessions, but you need the right modifier and place of service code.
Common telehealth billing setup for 90837:
- Modifier 95 for synchronous audio and video telehealth
- Modifier GT for some older payer policies (less common today)
- Place of Service 10 for telehealth provided in the patient’s home
- Place of Service 02 for telehealth provided in a location other than the patient’s home
Each payer has its own rules, so confirm telehealth policies before submitting claims. Many states have parity laws that require telehealth reimbursement at the same level as in-person care, but the details vary.
Common Diagnosis Codes Paired With CPT 90837
CPT 90837 must be linked to a valid ICD-10 diagnosis that supports medical necessity. The diagnosis tells the payer why the therapy is needed.
Frequently paired ICD-10 codes in behavioral health include:
- x for major depressive disorder
- x for recurrent depressive disorder
- 1 for generalized anxiety disorder
- 9 for unspecified anxiety disorder
- 10 for post-traumatic stress disorder, unspecified
- 23 for adjustment disorder with mixed anxiety and depressed mood
- x for ADHD
- x for bipolar disorder
The diagnosis should be clearly supported by the clinical record. Using a generic or unsupported code is one of the fastest paths to a denial.
Reimbursement for CPT 90837
Reimbursement for 90837 varies by payer, state, and contract. Medicare publishes national rates each year, and commercial plans often base their rates on a percentage of the Medicare fee schedule.
General reimbursement patterns:
- Medicare typically reimburses 90837 in the range of about 130 to 160 dollars, depending on locality and provider type
- Commercial payers may pay more or less based on the contracted rate
- Medicaid rates are usually the lowest and vary by state
- Telehealth rates often match in-person rates under parity laws
Always verify your fee schedule with each payer rather than relying on national averages.
Common Denial Reasons for CPT 90837 and How to Prevent Them
Most 90837 denials are preventable. They usually trace back to a few recurring issues.
| Denial Reason | What It Means | Quick Fix |
| Incomplete documentation | Notes do not support time or necessity | Add start and stop times and clinical details |
| Authorization not obtained | Plan required prior auth for therapy | Verify auth requirements before the session |
| Provider not credentialed | The clinician is out of network with the payer | Check credentialing status before billing |
| Wrong or missing modifier | Telehealth modifier missing or incorrect | Confirm payer telehealth policy |
| Diagnosis lacks medical necessityThe | ICD-10 code does not match the service | Use specific, supported diagnoses |
| Overuse of 90837 | 90837 billed for nearly every visit | Bill 90834 or 90837 based on actual time |
Running clean eligibility checks before each new patient and at the start of each plan year also prevents a large share of denials.
CPT 90837 vs 90847: Individual vs Family Therapy
These two codes get mixed up because both can involve a 50-plus-minute session, but they describe very different services.
- 90837 is for individual psychotherapy with one patient
- 90847 is for family or couples psychotherapy with the patient present
If the focus of the session is the patient’s individual treatment, even when a family member is briefly involved, 90837 may still apply. If the family system itself is the focus of treatment, 90847 is the more accurate code.
Also Read: What Is CPT Code 90832? 30-Minute Psychotherapy Guide
Quick Compliance Reminders for Mental Health Practices
Billing 90837 cleanly is about more than the code itself. It is about the full workflow around it.
- Verify benefits and prior authorization before the first session
- Use a consistent documentation template across the practice
- Track session time accurately rather than estimating
- Review payer policies on 90837 frequency limits
- Audit your own claims regularly to spot patterns early
A compliance-first mindset, paired with HIPAA-aware processes, keeps your revenue cycle healthier and reduces audit risk over time.
FAQs
Is 90837 a CPT code or a diagnosis code?
90837 is a CPT code, which means it describes a procedure or service. It is not a diagnosis code. Diagnosis codes come from the ICD-10 system, such as F32.1 or F41.1. On a claim, the CPT code 90837 tells the payer what was done, and the linked ICD-10 code tells them why it was medically necessary. Both must work together for the claim to be paid.
Does CPT 90837 require a modifier?
Not always. For standard in-person individual therapy, no modifier is needed. A modifier becomes necessary when the service is delivered through telehealth, in which case modifier 95 is the most common choice today. Some payers may also require place of service 10 or 02 along with the modifier. Older policies sometimes used the modifier GT, but most have moved to modifier 95. Always confirm the rule with the specific payer.
What is the time range for CPT code 90837?
CPT 90837 covers individual psychotherapy of 60 minutes, with an accepted time range of 53 minutes or more. If the session lasts less than 53 minutes, 90834 is usually the correct code. Time here refers only to direct face-to-face therapy time with the patient. It does not include documentation, scheduling, or other administrative work performed before or after the session.
Can 90837 be billed for telehealth sessions?
Yes. CPT 90837 is fully recognized for telehealth when the session meets the time requirement and is delivered through approved technology. You will typically need modifier 95 and the correct place of service code. Many payers now reimburse telehealth therapy at the same rate as in-person therapy, but rules continue to evolve, so check current payer policies and state parity laws before billing.
Is CPT 90837 FSA eligible?
Therapy billed under CPT 90837 is generally considered an eligible medical expense for FSA and HSA accounts when it is medically necessary and provided by a qualified professional. Patients should keep itemized statements showing the CPT code, date of service, diagnosis, and provider information. Tax and benefit rules vary by plan, so patients should always confirm with their FSA or HSA administrator before assuming reimbursement.
Final Thoughts
CPT 90837 is more than just a number on a claim. It represents an hour of focused mental health care, and billing it correctly protects both the provider and the patient relationship. Get the time right, document the clinical reasoning clearly, match the service to a supported diagnosis, and follow each payer’s telehealth and authorization rules. Practices that treat 90837 with this level of care tend to see fewer denials, smoother audits, and stronger cash flow over time.
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