Behavioral Assessment & Testing

96139 CPT

Psychological/neuropsychological test administration and scoring by technician; each additional half-hour

System

CPT code

Timing

Time-based — 30-min units

Add-on

Yes — needs a primary code

CPT 96139 is the add-on to 96138, reporting each additional half-hour of test administration and scoring by a technician.

When to use 96139

Add 96139 for each half-hour of technician-administered testing beyond the first half-hour reported by 96138.

How to bill it

Report one unit per additional half-hour alongside 96138.

Common pitfalls

Billing 96139 without 96138.
Including clinician administration or interpretation time.

Frequently asked questions

Is 96139 billable by itself?

No. It is an add-on that must accompany 96138.

Does 96139 include interpretation?

No. Technician administration/scoring is reported separately from the clinician’s evaluation and interpretation.

Related Behavioral Assessment & Testing codes

96156 CPT

Health behavior assessment or reassessment

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96127 CPT

Brief emotional/behavioral assessment, per standardized instrument

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96146 CPT

Psychological/neuropsychological test administration, single automated instrument

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96110 CPT

Developmental screening, per standardized instrument

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96158 CPT

Health behavior intervention, individual; initial 30 minutes

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96164 CPT

Health behavior intervention, group (two or more); initial 30 minutes

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96159 CPT

Health behavior intervention, individual; each additional 15 minutes (add-on)

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96165 CPT

Health behavior intervention, group; each additional 15 minutes (add-on)

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Pair this code with a billing tool

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OON Reimbursement Estimator

Help clients estimate their insurance reimbursement for out-of-network sessions based on coinsurance, deductible, and session fee.

ICD-10 Code Lookup

Search ICD-10-CM mental and behavioral health diagnosis codes by number or plain-language term like depression, PTSD, ADHD, or anxiety to see the description, billable status, and a clinical note.

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