CPT Code 90785: Interactive complexity add-on

When to Use CPT 90785

Use CPT code 90785 when billing for interactive complexity add-on. This code is used by licensed therapists (LCSW, LPC, MFT, Psychologist) for outpatient sessions.

Adding CPT 90785 to a Superbill

When generating a superbill with CPT 90785, include the ICD-10 diagnosis code, date of service, fee charged, amount paid, and your NPI number. Superbilled pre-fills common therapy CPT codes automatically.

Common ICD-10 Pairings

These diagnosis codes are frequently used alongside CPT 90785:

Documentation Requirements

Document the specific complexity factor: third-party involvement, language barriers, court-ordered treatment, or emotional/behavioral dysregulation during session.

Common Denial Reasons

• ✗ Interactive complexity factor not clearly documented in the note
• ✗ Billed without a qualifying primary psychotherapy or evaluation code
• ✗ Routine session complexity does not meet the add-on threshold

Modifier Notes

Add-on code — bill with a primary psychotherapy code (90832-90838) or evaluation (90791/90792).

Reimbursement Expectations

OON reimbursement is modest, typically $10-$25. Some payers bundle this into the primary service.