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CPT 90853 + ICD-10 F41.1: Generalized Anxiety Disorder

Group psychotherapy billed with Generalized Anxiety Disorder — documentation requirements, denial reasons, modifiers, and reimbursement context.

CPT Code
90853
Group psychotherapy
ICD-10 Code
F41.1
Generalized Anxiety Disorder
Common Modifiers

Compatibility Notes

Used for group therapy sessions where one or more participants carry a GAD diagnosis. CPT 90853 is billed per participant — each patient receives their own claim line with their individual diagnosis code. This is a common pairing for anxiety-focused group therapy programs (CBT for anxiety groups, ACT groups, mindfulness-based stress reduction). Ensure group size and structure meet payer requirements (typically 2–12 participants).

Documentation Required

  • Individual attendance record for each group participant
  • Per-participant diagnosis code on each claim
  • Group session summary including therapeutic content and patient engagement
  • Start and stop times for the group session
  • Individual patient response to group interventions documented in per-patient note or group note

Common Denial Reasons

  • Single claim submitted for the entire group rather than per-patient claims
  • Group size exceeds payer-defined maximum (check each payer policy — some cap at 8)
  • Notes are identical for all participants without individualized observations
  • Diagnosis not confirmed for each individual participant

Applicable Modifiers

Reimbursement Notes

UCR for 90853 is typically $50–$90 per participant OON. Commercial plan reimbursement is $25–$60 per patient. The revenue per session-hour is often favorable (e.g., 8 patients × $50 = $400/hour), but per-patient documentation requirements add administrative overhead.

Related Billing Guides

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