CPT Code 96139: Neuropsychological testing administration, each additional 30 min

When to Use CPT 96139

Use CPT code 96139 when billing for neuropsychological testing administration, each additional 30 min. This code is used by licensed therapists (LCSW, LPC, MFT, Psychologist) for outpatient sessions.

Adding CPT 96139 to a Superbill

When generating a superbill with CPT 96139, 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 96139:

Documentation Requirements

Document the additional tests administered and justify the extended time. Note testing conditions and patient engagement.

Common Denial Reasons

• ✗ Billed without the primary 96138 code
• ✗ Total time exceeds typical administration length for the battery
• ✗ Missing documentation of specific instruments used in the additional time

Modifier Notes

Add-on code — must be billed with 96138.

Reimbursement Expectations

OON reimbursement typically 45-60% of UCR. Expect $27-$72 per additional 30 minutes.