CPT Code 90853: Group Psychotherapy Billing Guide

The group therapy code with the lowest reimbursement but the highest per-hour earning potential — how to bill it correctly.

CPT code 90853 is used to bill for group psychotherapy. While 90853 reimburses at a lower per-patient rate than individual psychotherapy codes like 90834 or 90837, the math often works in the therapist’s favor: a group of six to eight patients billed at the group rate can exceed the hourly revenue of an individual session.

Group therapy comes with its own documentation and compliance requirements, and the mistakes that generate denials on 90853 are different from those for individual codes. This guide covers what 90853 is, how to document it, and what payers expect.

What 90853 covers

The CPT description for 90853 is “Group psychotherapy (other than of a multiple-family group).” It refers to psychotherapy provided in a group setting with multiple unrelated patients — typically a therapy group composed of patients who share a clinical focus (depression, anxiety, trauma, substance use, grief, etc.) but who are not family members to each other.

Multiple-family group therapy, where several families participate together, is billed differently and does not use 90853.

Who can bill 90853

LCSWs, LPCs, LMFTs, psychologists, psychiatrists, and other eligible mental health providers can bill 90853 under Medicare and most commercial payers. A group must be facilitated by a qualified mental health professional to meet the definition of group psychotherapy — peer-led support groups, 12-step meetings, and psychoeducational classes without therapy content generally do not qualify.

The group must be actively facilitated. A therapist who is physically present but not leading the therapeutic work is not providing group psychotherapy.

Billing mechanics

90853 is billed once per patient per group session. If you run a group of seven patients, you submit seven claims for 90853 for that session, each under the respective patient’s insurance.

The code is not time-based in the reportable-range sense that 90834 and 90837 are, but the CPT reference session length is approximately 45 to 60 minutes. Groups that are substantially shorter may not qualify for billing, and groups that run longer do not generate additional units.

Documentation for each group member

Group therapy documentation has a specific structure. Each patient participating in the group must have their own individual note for the session in their chart. The note should include:

• Date of service and group duration
• Group identifier and focus (e.g., “trauma recovery group,” “substance use relapse prevention”)
• Active diagnosis supporting the patient’s participation in group therapy
• The patient’s specific engagement in that group session — what they shared, how they participated, how they interacted with other members
• Interventions delivered to or involving that patient
• The patient’s response to the interventions
• Connection to the patient’s individual treatment plan goals
• Plan going forward

A single generic note used across all group members is a significant compliance risk. The essence of individualized documentation is that each patient’s note should reflect their participation and their clinical progress — not just describe what the group did as a whole.

Medical necessity for group therapy

Medicare requires medical necessity for any psychotherapy code, and group therapy is no exception. The patient must have a covered mental health diagnosis, and group therapy must be clinically appropriate for their treatment.

Some conditions are particularly well-suited to group therapy: substance use disorders, social anxiety, grief, trauma, interpersonal difficulties, eating disorders. Others may be less consistently supported — for example, severe acute suicidality is generally better addressed in individual therapy or higher levels of care.

The treatment plan for each patient should explicitly reflect that group therapy is part of the plan, with documented goals that the group modality is designed to address.

Common 90853 denials

Generic group note for all patients

The most common documentation finding in 90853 audits is that every patient’s note is identical. Each patient’s chart should reflect their own individual engagement in the session.

Group not actually therapeutic

If the group is primarily psychoeducational, skills-based, or peer-supportive without active therapeutic facilitation, 90853 may not be the appropriate code. The facilitator’s role in delivering psychotherapeutic interventions must be evident from the documentation.

Missing individual treatment plan connection

Each patient’s individual treatment plan must reflect that group therapy is an appropriate modality for them. A note that does not connect the group work to the patient’s treatment plan goals is weaker on review.

Frequency and duration issues

A patient who has been in a therapy group for years without documented progress toward treatment goals may be flagged. Group therapy is not a maintenance service under Medicare — it is a time-limited therapeutic intervention aimed at specific goals, and the documentation should reflect forward clinical motion.

Billing for no-shows

90853 is billed per patient who attended the session. Patients who were scheduled but did not attend cannot be billed. This seems obvious but is a recurring audit finding in some practices.

Mixing individual and group therapy

A patient can receive both individual and group therapy on the same day, though both services are not always covered when provided on the same date. Payer policies vary. When both are delivered on the same day, each service must be separately documented, clearly distinct in time and content, and both must be individually medically necessary.