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96137 CPT Code Description: Complete Billing & Documentation Guide

This guide strips away the confusion. From its official definition to unit calculation, documentation requirements, common pitfalls, and reimbursement expectations for 2026, here is everything you need to know about CPT code 96137 explained clearly, practically, and completely.

What Is CPT Code 96137? The Official Definition

CPT code 96137 is formally defined by the American Medical Association as:

“Psychological or neuropsychological testing administration and scoring by physician or other qualified health care professional, two or more tests, any method, each additional 30 minutes (List separately in addition to code for primary procedure).”

In plain language: when a licensed psychologist, psychiatrist, or other credentialed clinician personally administers and scores standardized psychological or neuropsychological tests, and that process extends beyond the initial 30-minute window covered by CPT 96136 each additional 30-minute increment gets billed under CPT 96137.

This code sits firmly in the add-on code category, meaning it carries a “+” designation in the CPT manual. It cannot be billed as a standalone code under any circumstances. It always rides alongside CPT 96136 as the anchor.

The Code Family: Understanding Where 96137 Fits

To use 96137 correctly, you must understand how it relates to the broader family of psychological and neuropsychological testing codes restructured by CMS in 2019.

CPT Code	Description	Who Performs It
96130	Psychological testing evaluation – first hour	Psychologist/qualified professional
96131	Psychological testing evaluation – each additional hour	Psychologist/qualified professional
96132	Neuropsychological testing evaluation – first hour	Psychologist/qualified professional
96133	Neuropsychological testing evaluation – each additional hour	Psychologist/qualified professional
96136	Test administration & scoring – first 30 minutes	Psychologist/qualified professional
96137	Test administration & scoring – each additional 30 minutes	Psychologist/qualified professional
96138	Test administration & scoring – first 30 minutes	Technician (under supervision)
96139	Test administration & scoring – each additional 30 minutes	Technician (under supervision)
96146	Single automated test – electronic administration	Automated platform

The 2019 restructuring was intentional: CMS wanted to draw a bright line between what the licensed professional does versus what a supervised technician does. CPT 96136 and 96137 are reserved exclusively for when the psychologist or physician is the one holding the clipboard and running the session. The moment a technician steps in, you shift to 96138 and 96139.

This distinction is not merely semantic it affects both compliance and reimbursement. Billing 96136/96137 when a technician performed the work is a documentation error that can trigger claim denials, audits, or worse.

How Time-Based Billing Works for CPT 96137

Time-based billing is where many providers stumble, so let’s walk through this carefully.

The Midpoint Rule

CPT’s time-based billing standard is governed by the midpoint rule. You can bill an additional unit of 96137 once you have crossed the midpoint of the next 30-minute increment. Since each unit represents 30 minutes, the midpoint falls at 15 minutes — but because 96137 begins after the first 30 minutes of 96136, the real calculation looks like this:

96136 = First 30 minutes of administration

First unit of 96137 = Requires at least 16 additional minutes beyond the 96136 block (to cross the 15-minute midpoint of the next 30-minute interval)

Second unit of 96137 = Requires at least another 16 minutes beyond the first 96137 unit

And so on

Practical Time Calculation Chart

Total Administration Time	Codes to Bill
1 – 30 minutes	96136 x1
31 – 45 minutes	96136 x1
46 – 75 minutes	96136 x1 + 96137 x1
76 – 90 minutes	96136 x1 + 96137 x1
91 – 120 minutes	96136 x1 + 96137 x2
121 – 150 minutes	96136 x1 + 96137 x3
151 – 180 minutes	96136 x1 + 96137 x4

Important: Breaks, restroom time, and conversations unrelated to testing do not count toward the billable time. Only face-to-face administration and scoring time qualifies.

Multi-Day Testing Episodes

Comprehensive neuropsychological evaluations frequently span multiple sessions spread across several days. When this happens, the correct approach is to accumulate all time across sessions and submit the claim on the last day of service. You do not split the claim day by day. All units of 96136 and 96137 are submitted together once the entire testing episode is complete.

Documentation Requirements: The Foundation of a Defensible Claim

No matter how accurate your unit calculation, your claim is only as strong as the documentation supporting it. Here is what a well-documented 96137 claim looks like:

1. Start and Stop Times

The clinical record must include precise start and stop times for each testing session. Timestamps like “9:05 AM – 11:47 AM” are not only best practice they are increasingly required by payers during audits. Vague entries like “patient seen for testing in the morning” will not survive scrutiny.

2. Test Battery Administered

Document every standardized instrument used during the session. Listing test names is not enough you should specify which tests were administered in which time segments, especially when multiple tests span a long session.

Common instruments that appear in 96137 billing include:

• Wechsler Adult Intelligence Scale (WAIS-IV) – cognitive and intelligence testing
• Wechsler Memory Scale (WMS-IV) – memory assessment
• Delis-Kaplan Executive Function System (D-KEFS) – executive functioning
• Minnesota Multiphasic Personality Inventory (MMPI-3) – personality and psychopathology
• Conners’ Continuous Performance Test (CPT-3) – attention and ADHD evaluation
• Beck Depression Inventory (BDI-II) – depression symptom severity
• Patient Health Questionnaire-9 (PHQ-9) – depression screening

3. Medical Necessity

Every claim requires a clear, documented rationale explaining why psychological or neuropsychological testing was clinically necessary. This ties directly to the patient’s presenting complaints, referral reason, and the diagnostic question being answered. Vague justifications like “patient referred for testing” will frequently result in denials.

4. ICD-10 Diagnostic Codes

The clinical record must link the testing services to appropriate ICD-10 codes. Common pairings include:

• F90.x – Attention-deficit hyperactivity disorder (ADHD)
• F32.x / F33.x – Major depressive disorder
• F41.x – Anxiety disorders
• G31.84 – Mild cognitive impairment
• F07.81 – Postconcussional syndrome (traumatic brain injury)
• F20.x – Schizophrenia spectrum disorders
• F70–F79 – Intellectual disabilities

5. Qualified Provider Credentials

The documentation must clearly identify the licensed professional who administered the tests. Their qualifications licensure type, state of licensure, and NPI number should be included in the claim. Remember: if a technician performed any portion of the administration, that time must be billed under 96138/96139 and kept separate.

Reimbursement Rates for CPT 96137 in 2026

Understanding what you should expect to be paid is just as important as knowing how to bill correctly.

Medicare’s national average reimbursement for CPT code 96136 runs approximately $43.94 per 30-minute unit, and private payers typically follow a comparable baseline for the companion 96137 code, with commercial reimbursement generally ranging from $55 to $65 per 30-minute increment.

Factors That Influence Payment

Several factors influence the actual payment you receive:

• Geographic location: Urban markets with higher practice costs tend to reimburse at a higher rate.
• Payer contract terms: Contracted rates with commercial insurers vary significantly by network.
• Provider type: Hospital-based providers may have different rates than private practice psychologists.
• Facility vs. non-facility settings: Rates differ based on where the service is rendered.

Daily Unit Cap Guidance

The daily unit cap generally allows billing up to a combined 6 hours of administration time per testing episode day which translates to 1 unit of 96136 and up to 11 units of 96137 in a single day, though exceeding this threshold will likely trigger a medical necessity review.

Telehealth Billing for CPT 96137

The expansion of telehealth mental health services has opened the door for remote psychological testing. As of 2026, CMS continues to allow billing for psychological testing codes including 96136 and 96137 via telehealth platforms through December 31, 2026.

To bill 96137 for a telehealth encounter, providers should:

• Ensure the platform used is HIPAA-compliant and supports synchronous real-time video connection
• Apply the appropriate telehealth modifier as required by the payer (typically modifier 95 for synchronous telehealth or modifier GT for Medicare)
• Document that the patient provided informed consent for telehealth services
• Confirm that the state where the patient is physically located allows telehealth testing under the provider’s licensure

Not all standardized instruments are validated for remote administration. Before conducting telehealth-based testing, verify that the specific instruments in your battery have established norms and protocols for virtual delivery.

Common Billing Errors – and How to Avoid Them

Even experienced billing professionals make mistakes with CPT 96137. Here are the most frequent errors and how to steer clear of them:

Error 1: Billing 96137 Without 96136

Since 96137 is an add-on code, it cannot appear on a claim without its parent code 96136. Submitting 96137 as a standalone will result in an automatic denial.

Error 2: Incorrect Unit Calculation Based on Break Time

Including non-testing time (lunch breaks, administrative tasks, waiting between sessions) in the billable minute count inflates unit counts beyond what is defensible. Always count only active, face-to-face test administration time.

Error 3: Mixing Professional and Technician Codes

Billing 96136/96137 when a technician administered the tests conflates two distinct code families. Keep the pairings clean: 96136/96137 for qualified professionals, 96138/96139 for technicians.

Error 4: Missing Authorization

Some commercial payers require prior authorization for comprehensive psychological testing. Failing to secure authorization before testing begins can result in retroactive denials that are difficult to appeal.

Error 5: Vague or Undated Documentation

Generic progress notes without specific timestamps, test names, or clinical rationale are a red flag during payer audits. Specificity in documentation is your best protection.

Best Practices for Compliance and Maximum Reimbursement

Running a compliant, financially sustainable psychological testing practice in 2026 requires more than just knowing the codes. It requires building systems around them.

• Implement a real-time time-tracking workflow – Whether you use an EHR system, billing software, or a dedicated behavioral health platform, capturing start and stop times as they happen rather than reconstructing them at the end of the day dramatically reduces documentation errors.
• Conduct periodic internal audits – Reviewing a sample of 96137 claims quarterly allows you to identify patterns of error before they become patterns of denial.
• Stay current on payer-specific policies – Medicare, Medicaid, and commercial payers each have their own coverage determination documents. A policy that applies to one payer does not automatically apply to another. Download and save payer coverage policies for psychological testing annually.
• Train your clinical staff alongside your billing team – Compliance breaks down when clinicians and coders operate in separate silos. When psychologists understand why timestamps matter and billing specialists understand the clinical flow of a testing session, accuracy improves across the board.

The Clinical Case for Getting This Right

There is a dimension of this discussion that goes beyond revenue. When CPT 96137 is billed accurately and claims are reimbursed appropriately, the downstream effect is that patients continue to have access to comprehensive psychological evaluation services. When practices are chronically underpaid because of billing errors, they scale back the time they can offer for complex evaluations and patients lose access.

Accurate billing for psychological testing is, in a very real sense, a patient access issue. The families seeking ADHD evaluations for their children, the veterans undergoing traumatic brain injury assessments, the adults trying to understand a new diagnosis of early cognitive decline all of them benefit when the billing infrastructure supporting these services functions correctly.