CPT 90853 + ICD-10 F41.1: Generalized Anxiety Disorder
Group psychotherapy billed with Generalized Anxiety Disorder — documentation requirements, denial reasons, modifiers, and reimbursement context.
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.
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