CPT 96138 & 96139: Test Administration by Technician 

CPT 96138 covers the first 30 minutes, and add-on code 96139 each additional 30 minutes, of two or more standardized psychological or neuropsychological tests administered and scored by a trained technician under a physician's or clinical psychologist's general supervision. Claims are submitted under the supervising provider's NPI, not the technician's.

This page provides general educational information about CPT and RTM billing codes. It is not coding advice, a guarantee of reimbursement, or a substitute for your own compliance review. Payer coverage and documentation requirements vary by plan and can change — verify current requirements with CMS, your Medicare Administrative Contractor, and each payer before billing.

What 96138 and 96139 Cover

96138 and 96139 describe the administration and scoring of standardized psychological or neuropsychological tests when that hands-on work is done by a technician — typically a psychometrist or trained assistant — rather than by the physician or qualified health care professional (QHP) personally. This is the technician-level counterpart to 96136/96137 (QHP-administered) and 96146 (automated/computer-administered). Under the 2019 restructuring of the psych/neuropsych testing code family, administration is billed separately from evaluation, so 96138/96139 stand apart from the evaluation codes (96132/96133) that cover the physician's interpretation, integration, and report-writing.

96138 is the base code for the first 30 minutes of technician-administered testing time. 96139 is an add-on code reported for each additional 30-minute block, and it cannot be billed on its own — it must accompany 96138 on the same claim.

Who Can Bill 96138 / 96139

The technician performs the direct, face-to-face testing work, but the claim is submitted under the supervising physician's or clinical psychologist's NPI. This matters because CMS draws a specific line for this code family: general supervision of these diagnostic psychological and neuropsychological tests may be provided only by a physician or a clinical psychologist. That is a carve-out from CMS's broader rule allowing nurse practitioners, clinical nurse specialists, physician assistants, and CRNAs to supervise diagnostic tests generally — for 96138/96139 specifically, that broader allowance does not apply. A practice where an NP is the primary supervising clinician for a testing program should confirm who is formally providing supervision for these codes before billing them.

The technician themselves must meet the credentialing and training standards applicable in their state and setting; documentation should reflect that the person administering the test was appropriately trained and that the supervising physician/psychologist maintained overall responsibility for the service, even without being physically present during administration ("general supervision" does not require on-site presence, but it does require availability and oversight).

Time and Unit Rules

96138 and 96139 are billed in 30-minute increments based on the technician's actual face-to-face time administering tests to the patient — not on total time in the building, and not on scoring time performed away from the patient after the encounter, unless payer policy specifically includes it. This 30-minute-increment structure is distinct from the hour-based increments used by the evaluation codes 96132/96133 and the neurobehavioral status exam codes 96116/96121, so practices billing across the full code family should not assume a single time-rule convention applies to all of it.

Documentation should capture start and stop times, or total minutes, for the technician-administered portion specifically, separate from any time the physician or QHP spends on evaluation, interpretation, or report preparation.

Documentation Requirements

A clean 96138/96139 claim generally needs:

• Clear documentation of the technician's actual administration time, supporting the number of units billed
• Evidence of appropriate general supervision by a physician or clinical psychologist — not merely a supervising NP, PA, or CNS, given the carve-out described above
• Identification of which specific standardized tests were administered (two or more tests are required to bill this code family)
• A record tying the testing to a documented order and medical necessity from the referring or supervising provider
• Separation of technician administration time from any QHP-performed evaluation time billed separately under 96132/96133

Common Denial Reasons

• Missing or inadequate documentation establishing that a physician or clinical psychologist — not another provider type — supervised the testing
• The technician's credentials not meeting the payer's or state's requirements for testing personnel
• Billed units not supported by documented time
• 96139 billed without a corresponding 96138 on the same claim
• 96139 mistakenly appended to 96136 (the QHP-administered base code) instead of 96138 — a mismatch between the base code and the add-on code's intended pairing
• Insufficient documentation of medical necessity or a valid order for the testing

Worked Example Scenario

A sports medicine practice orders a neurocognitive battery for a patient with persistent post-concussive symptoms. A trained psychometrist, supervised generally by the practice's physician, administers and scores a battery of two standardized cognitive tests over 45 minutes of direct patient contact. The claim would reflect 96138 for the first 30 minutes and 96139 for the additional 15-minute block, submitted under the supervising physician's NPI, with documentation of the technician's time and the physician's supervisory role. The physician's later review, interpretation, and report — if billed separately — would fall under 96132/96133, not 96138/96139.

Related and Adjacent Codes

• 96132 / 96133 — the physician/QHP evaluation, interpretation, and report-writing side of neuropsych testing, billed separately from administration
• 96136 / 96137 — the QHP-administered equivalent, used when the physician or QHP personally administers and scores the tests instead of a technician
• 96146 — the fully automated/computer-administered equivalent, billed once per date of service regardless of time
• 96116 / 96121 — the neurobehavioral status exam, a distinct clinical/behavioral evaluation rather than standardized test administration

Per CMS guidance, multiple distinct, clinically appropriate testing codes — physician/QHP-administered, technician-administered, and computer-administered — may be billed on the same date of service for one patient when genuinely different tests were performed through each pathway.

FAQ

Can a nurse practitioner supervise technician-administered testing under 96138/96139?

CMS's guidance for this specific code family limits general supervision to a physician or clinical psychologist. This is narrower than CMS's general diagnostic-testing supervision rule, which does allow NPs, CNSs, PAs, and CRNAs to supervise in other contexts. Practices should confirm who is formally recorded as the supervising provider for these codes.

Can 96138/96139 and 96136/96137 be billed on the same date?

Per CMS's same-date multiple-code guidance, distinct testing pathways for genuinely different tests may be billed together on the same date. Billing both codes for administration of the same test through two different pathways would not be appropriate.

Does 96139 require its own separate documentation of time?

Yes. 96139 is an add-on code and should be supported by documentation showing the additional 30-minute block(s) of technician administration time beyond the first 30 minutes captured by 96138.

How is 96138/96139 different from 96146?

96138/96139 apply when a technician personally administers and scores the tests. 96146 applies when the test is administered and scored by an automated, computer-based platform with no technician or QHP involved in administration, and it is billed once per date of service rather than by time increment.

How Kavera Handles This

When an MA or technician runs the in-office battery, Kavera records the administering user, the supervising clinician, the instruments and the time. Role-based access and the audit log show who did what, which is what supervision documentation depends on. Self-Serve practices run this with their own staff. On Managed, Juliet Mott's team runs it and bills it under your credentials. Educational, not coding advice. Verify requirements with CMS, your MAC and each payer.