CPT Code 90834: Billing for Therapy Sessions

CPT code 90834 is the Current Procedural Terminology (CPT) code used to bill individual psychotherapy sessions lasting 38 to 52 minutes.

Medicare, Medicaid, and commercial insurers recognize CPT 90834 as the standard billing code for 45-minute outpatient psychotherapy.

Psychiatrists, psychologists, licensed clinical social workers (LCSWs), licensed professional counselors (LPCs), licensed marriage and family therapists (LMFTs), and other qualified behavioral health providers commonly use CPT 90834 to bill individual psychotherapy services.

CPT 90834 applies to medically necessary psychotherapy delivered in person or via real-time telehealth and requires documentation supporting session duration, treatment goals, patient progress, and an ICD-10 mental health diagnosis. 

CPT code 90834 covers cognitive behavioral therapy (CBT), supportive therapy, psychodynamic therapy, and other evidence-based psychotherapy interventions. 

Understanding CPT 90834 billing requirements, reimbursement rules, modifiers, documentation standards, and compliance guidelines helps providers maximize payment accuracy while reducing audit risk.

When to Use CPT Code 90834

CPT 90834 is used for a face-to-face individual psychotherapy session between 38 and 52 minutes. The code fits standard 45-minute outpatient appointments and covers most weekly therapy visits.

Choose 90834 when the session involves:

• One patient (with or without family members present)
• Insight-oriented or behavior-modifying therapy
• Treatment of a billable mental health diagnosis
• Face-to-face contact in the office or via real-time telehealth

Do not bill 90834 for psychiatric diagnostic evaluations (use 90791 or 90792), group therapy (90853), family therapy without the patient (90846), family therapy with the patient as the identified client (90847), or crisis psychotherapy (90839/90840).

Example: A licensed clinical social worker meets with an adult patient diagnosed with F41.1 (generalized anxiety disorder) for 47 minutes of cognitive behavioral therapy. The correct code is 90834.

Who Can Bill CPT Code 90834?

Licensed mental health professionals can bill 90834 if their license type covers psychotherapy and they are credentialed with the payer. Eligible provider types include:

• Physician assistants in mental health roles where state law allows
• Psychiatrists (MD or DO)
• Clinical psychologists (PhD or PsyD)
• Licensed clinical social workers (LCSW)
• Licensed professional counselors (LPC)
• Licensed marriage and family therapists (LMFT)
• Licensed mental health counselors (LMHC)
• Psychiatric mental health nurse practitioners (PMHNPs)

Time Requirements for CPT Code 90834

CPT 90834 requires 38 to 52 minutes of face-to-face psychotherapy time. The AMA uses the midpoint rule between adjacent codes to set these boundaries.

Time counts only when the clinician is actively engaged with the patient. The following do not count toward the session minutes:

• Scheduling or check-in time
• Documentation written before or after the session
• Phone calls or messages outside the session
• Waiting for a late patient

Sessions that fall outside the 38 to 52-minute window require different codes:

A 52-minute session bills as 90834. A 53-minute session billed as 90837. Auditors review start and stop times carefully because the one-minute boundary affects reimbursement by 15 to 25 percent.

CPT Code 90834 vs 90837

CPT 90834 and 90837 cover the same type of individual psychotherapy. Session duration is the only clinical difference. The reimbursement difference is significant.

Reimbursement Rate for CPT Code 90834

The reimbursement rate for CPT 90834 varies based on geographic location and insurance provider policies. Medicare typically reimburses between $112.00 and $145.01, but private insurers may offer different rates based on their contracted agreements with providers.

For the most accurate reimbursement details, providers should check with their Medicare Administrative Contractor (MAC) or private insurance payer.

Billing CPT Code 90834: Key Requirements

To ensure accurate billing and avoid claim denials, providers should follow these key billing guidelines:

• Date of service: Single date for one session
• Procedure code: 90834
• Units: One unit per session (multiple units per day trigger automatic denial under most payer policies)
• Diagnosis pointer: Link to the primary ICD-10 code
• Place of service code: 11 for office, 10 for patient home telehealth, 02 for telehealth in another location, 12 for home (in-person), 22 for outpatient hospital
• Rendering provider NPI: Individual NPI of the treating clinician
• Modifier when required: 95 for synchronous audio-video telehealth, 93 for audio-only

Same-day billing of 90834 with another psychotherapy code for the same patient is generally not allowed. The 2026 NCCI Policy Manual prohibits billing 90834 with 90832, 90837, 90839, or 90791 on the same date without a modifier showing distinct services.

How to Properly Document CPT Code 90834

Proper documentation is essential to ensure insurance approval and compliance. The following elements must be included:

1. Session Start and End Times: Document exact start and end times to confirm that the session meets the 38-52 minute range.
2. Therapeutic Techniques Used: Specify which psychotherapy techniques were applied during the session.
3. Patient’s Mental and Emotional Status: Document the patient’s mood, affect, and overall mental state during the session.
4. Treatment Goals and Progress: Include details about progress made, challenges faced, and any modifications to the treatment plan.
5. Session Summary: Provide a brief overview of the discussion topics, coping strategies taught, and any action steps for the next session.

Common ICD-10 Codes Billed With CPT 90834

Payers require a billable ICD-10 diagnosis to support medical necessity. The most common diagnoses paired with 90834 in outpatient mental health:

Common Mistakes to Avoid When Billing CPT 90834

Billing mistakes can lead to claim rejections, payment delays, and compliance risks. Here are some common errors to avoid:

• Not Documenting Start and End Times: Insurance providers require clear documentation of session times. Missing this detail may lead to claim denial.
• Billing for Sessions Under 38 Minutes: Sessions must last at least 38 minutes to be billed under CPT 90834. Shorter sessions should use CPT 90832 (30 minutes).
• Incomplete Documentation of Therapy Focus: Insurance payers require clear and specific information about the mental health condition being treated and therapy methods used.
• Ignoring Payer-Specific Guidelines: Each insurance provider has different billing rules. Always verify payer policies before submitting claims.

Tips for Maximizing Reimbursement with CPT Code 90834

To avoid claim denials and maximize reimbursement, follow these best practices:

1. Verify Patient Coverage Before Treatment: Confirm insurance benefits, coverage limitations, and copay amounts before the session.
2. Check for Telehealth Eligibility: Many payers cover CPT 90834 for virtual sessions, but requirements vary. Use the correct telehealth modifiers (-95) if needed.
3. Ensure Compliance with State and Federal Regulations: Stay updated on HIPAA, Medicare, and insurance policies related to psychotherapy billing.
4. Submit Claims Within the Allowed Timeframe: Each insurer has a claim submission deadline. Late claims may be denied.

CPT Code 90834 for Telehealth

With the rise of telehealth psychotherapy, many insurance providers now reimburse CPT 90834 for virtual sessions. However, specific rules vary by payer. Key considerations include:

• Confirm Insurance Coverage for Telehealth: Some insurers pay the same rate for telehealth and in-person sessions, while others pay lower rates for virtual visits. Always verify coverage.
• Use the Correct Telehealth Modifier: Commonly used modifiers include: 95 Modifier – Used for synchronous (real-time) telehealth visits
• Use a HIPAA-Compliant Telehealth Platform: Telehealth sessions must be conducted on secure, HIPAA-compliant video platforms.
• Document Virtual Location: Indicate where both the provider and patient were located during the telehealth session

Conclusion

CPT Code 90834 is a widely used billing code for 45-minute psychotherapy sessions provided by non-prescribing mental health professionals. To ensure accurate billing and maximum reimbursement, providers must follow payer-specific guidelines, document session details thoroughly, and use the correct modifiers for telehealth visits.

By maintaining comprehensive records, verifying insurance coverage, and avoiding common billing errors, therapists and counselors can streamline their billing process, reduce claim denials, and focus on providing quality mental health care.