CPT 96133: Neuropsychological Testing Evaluation (Each Additional Hour)

CPT 96133 is the add-on code for each additional hour a physician or qualified health care professional (QHP) spends on the evaluative work of neuropsychological testing — beyond the first hour billed under 96132. It covers time spent interpreting test data, integrating clinical information, and preparing the report, and it can never be billed alone.

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 CPT 96133 Covers

CPT 96133 is an add-on code, meaning it is never billed as a standalone service — it must accompany 96132 on the same claim. Together, 96132 (first hour) and 96133 (each additional hour) capture the physician/QHP time spent on the evaluation side of neuropsychological testing: integrating the patient's history, prior records, and behavioral observations with standardized test results; interpreting the data in clinical context; formulating a diagnostic impression and treatment plan; and writing the report. This evaluative work is billed and documented separately from the hands-on administration of the tests themselves, which falls under a different set of codes (96136–96139 or 96146) under the neuropsychological/psychological testing code family that was substantially revised effective January 1, 2019.

In practical terms, 96133 exists because thorough neuropsychological evaluation frequently runs longer than a single hour — particularly for complex post-concussion, post-injury, or multi-domain cognitive presentations where the clinician is synthesizing results across attention, memory, processing speed, executive function, and mood/symptom measures. Each additional hour of that synthesis and reporting work is what 96133 is designed to capture.

Who Can Bill CPT 96133

96133 may be billed only by the same category of provider eligible to bill 96132: a licensed psychologist, neuropsychologist, or other QHP who is personally performing the evaluative work — reviewing data, forming clinical judgments, and writing the report. It is not billable by a technician or psychometrist, and it cannot be billed under a technician's own credentials even if a technician contributed to test administration earlier in the encounter. The evaluating QHP must be the one whose time is being counted and documented under 96133.

Time and Unit Rules

96133 is hour-based, consistent with the time-reporting convention used for 96132. Each unit of 96133 represents an additional hour of evaluative time beyond the first hour already billed under 96132. Billing guidance commonly references a threshold of roughly half the additional hour (often cited as approximately 31 minutes) to justify reporting the next unit, consistent with CPT's general time-reporting convention — but this specific threshold was not confirmed verbatim in a primary CMS or AMA source during research for this page, and practices should verify current CPT time-rule guidance (and their payers' specific interpretation) before treating it as a hard rule.

Documentation should reflect total time spent on the evaluative components — start/stop times or total minutes — for each hour billed. 96133 cannot be reported without a corresponding 96132 on the same claim, and the number of 96133 units billed must be supported by documented time in excess of what the first hour (96132) already accounts for.

Documentation Requirements

To support 96133, documentation should generally include:

• Total time spent on evaluative work (data integration, interpretation, clinical decision-making, and report preparation), broken out in a way that supports the additional hour(s) billed beyond 96132.
• A clear description of what the additional time was spent on — for example, integrating a larger volume of prior records, an unusually complex multi-domain test battery, or extended differential diagnostic reasoning.
• Documented medical necessity for the evaluation as a whole, tying the testing to a specific clinical question (e.g., post-concussion cognitive complaints, differentiating psychiatric from neurocognitive contributors to symptoms).
• The identity and credentials of the billing QHP performing the evaluative work.

Common Denial Reasons

• 96133 billed without 96132 on the same claim — 96133 is an add-on code and will not be recognized as a standalone service.
• Missing or insufficient time documentation — no start/stop times or total minutes to support the additional hour(s) claimed.
• Lack of documented medical necessity for the extended evaluation.
• Exceeding payer frequency limits — some payers restrict how often neuropsychological testing evaluation can be billed for the same patient within a defined period.
• Missing prior authorization, where required by the payer.

Worked Example Scenario

A sports-medicine physician orders a full neuropsychological test battery for a patient with persistent post-concussive symptoms three months after injury, including attention, memory, and processing-speed measures alongside mood and symptom-severity screens. A supervised technician administers and scores the battery (billed separately under 96138/96139). The evaluating neuropsychologist then spends time reviewing the technician-collected data, integrating the patient's prior imaging and clinic notes, applying validity indices, forming a clinical impression, and writing an integrated report addressing both cognitive findings and return-to-work implications. The first hour of that evaluative work is billed under 96132; if the evaluative work — interpretation, integration, and report writing — extends meaningfully beyond that first hour, the additional time is billed under 96133, with documentation supporting the total time spent.

Related and Adjacent Codes

• CPT 96132 — the base code for the first hour of neuropsychological test evaluation; 96133 cannot be billed without it.
• CPT 96136/96137 — test administration and scoring performed personally by a physician/QHP, billed separately from evaluation time.
• CPT 96138/96139 — technician-administered test administration and scoring, billed under the supervising physician's or psychologist's oversight.
• CPT 96146 — automated/computer-administered test administration and scoring, billed once per date of service regardless of time.
• CPT 96116/96121 — the neurobehavioral status exam, a related but distinct face-to-face clinical evaluation code, not a standardized test-battery interpretation code.

How Kavera Handles This

Longer interpretation sessions at the feedback visit or re-evaluation are timestamped in Kavera as they happen. The log supports the additional-hour threshold for 96133 when the clinical work runs that long. 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.