CPT Code 96133: Neuropsychological testing evaluation, each additional hour

When to Use CPT 96133

Use CPT code 96133 when billing for neuropsychological testing evaluation, each additional hour. This code is used by licensed therapists (LCSW, LPC, MFT, Psychologist) for outpatient sessions.

Adding CPT 96133 to a Superbill

When generating a superbill with CPT 96133, 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 96133:

Documentation Requirements

Document additional interpretation time beyond the first hour. Justify the need for extended neuropsychological evaluation.

Common Denial Reasons

• ✗ Billed without the primary 96132 code
• ✗ Units exceed typical battery length for the referral question
• ✗ Insufficient documentation of extended interpretation need

Got one of these on a remittance? Decode the denial code.

Modifier Notes

Add-on code — must be billed with 96132 as the primary service.

Reimbursement Expectations

OON reimbursement typically 50-65% of UCR. Expect $75-$195 per additional hour.