CPT 90853 + ICD-10 F41.9: Anxiety disorder, unspecified
Group psychotherapy billed with Anxiety disorder, unspecified — documentation requirements, denial reasons, modifiers, and reimbursement context.
Compatibility Notes
Used for group therapy sessions where participants carry an unspecified anxiety diagnosis. Common in general anxiety groups before more specific diagnoses are established. Most payers accept this combination though unspecified codes may be scrutinized in audits. Per-participant billing required.
Documentation Required
- ✓Per-participant attendance and diagnosis
- ✓Anxiety group content and approach
- ✓Individual participant notes
- ✓Outcome measure per patient
Common Denial Reasons
- ✗Group billed as single claim
- ✗Chronic use of unspecified anxiety code per participant
- ✗No individualized progress notes
Applicable Modifiers
Reimbursement Notes
OON UCR $50–$90 per participant. Refine participant diagnoses to more specific codes as clinically appropriate.
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