The short answer: a diagnosis and a test battery are different purchases, and most people are quoted the second when they need the first. A clinical interview — one appointment, history, mental status exam — is what produces most diagnoses, including ADHD. Formal testing earns its cost when a specific question cannot be answered any other way: which of two overlapping conditions this is, how much cognition has changed since an injury, or what accommodations a school or a licensing body needs documented. If nobody can tell you the question the testing will answer, you are buying a report, not an answer.
What "testing" actually is, in the billing
Since 2019 testing has been billed as two separate things, and the split explains the price:
| What it is | Codes | Unit |
|---|---|---|
| The psychologist's evaluation work — choosing tests, interpreting, writing, feeding back | 96130 (psychological) · 96132 (neuropsychological) + additional hours | per hour |
| Administering and scoring the instruments — by the psychologist | 96136, 96137 | per 30 minutes |
| Administering and scoring by a technician | 96138, 96139 | per 30 minutes |
| A single automated test on a screen, automated result | 96146 | once |
| A neurobehavioral status exam — a clinical interview exam, not a battery | 96116, 96121 | per hour |
Two consequences worth knowing before you agree to anything. The technician and automated codes carry no professional work value at all in Medicare's own file — they pay for the room and the materials, not for expertise. And a report code billed with no administration code is a denial in Medi-Cal's rules. Ask which codes a practice intends to bill and how many units; that is the estimate.¹ ²
What an hour is worth, as a benchmark
No California or federal agency publishes what an evaluation costs, and anyone quoting a tidy statewide average is guessing. What is published is what Medicare pays, which is a floor, not a market price. In California in 2026, Medicare pays roughly $127 for the first hour of psychological evaluation work and $89 for each additional hour, plus about $46 for the first half-hour of test administration and $39 for each additional half-hour — higher in the Bay Area, where the first hour is about $145. A six-hour battery therefore prices at roughly $500–630 of Medicare money.³
Commercial and cash rates run well above that, which is where the $2,000–6,000 quotes come from. Use the benchmark the way a mechanic's book rate is used: to ask why a number is four times it.
The four routes that pay for it
1. Your health plan. California requires plans to cover medically necessary treatment of every mental health condition in the DSM or ICD, and the statutory definition includes services for "preventing, diagnosing, or treating" — that word is what brings testing inside the mandate.⁴ Expect prior authorization, and expect a plan to require a clinical interview first: one California insurer's own published policy says testing is appropriate only "if through the gathering of history and mental status examination… a diagnosis cannot be clarified."⁵ If it gets denied →
2. Medi-Cal. Covered, and — unusually — the annual limits are published. Without a treatment authorisation request you get three hours of evaluation time and five hours of test administration per year, counted across every provider.⁶ Enough for a focused question, not enough for a full neuropsychological battery; that needs the authorisation.
3. Your school district, free. If the question is about a child's learning or functioning at school, the district must assess on a written parent request — 15 days to give you an assessment plan, 60 days from your consent to finish and hold the meeting, at no cost.⁷ The request letter and both deadlines →
4. Paying cash, with the estimate in writing. If you are uninsured or self-paying, federal law entitles you to a good-faith estimate before the appointment. How that works →
Start here
- ADHD → — the one where a full battery is least often necessary.
- Autism, child → — where the school and the health plan both owe you something.
- Autism, adult → — the thinnest market in the state, and what the diagnosis actually unlocks.
- Neuropsychological → — after a concussion, a stroke, or memory change.
Sources
- CMS, Diagnostic Psychological and Neuropsychological Tests FAQs — technician and computer-administered codes; billing at completion of the episode — cms.gov.
- Medi-Cal Provider Manual, Non-Specialty Mental Health Services: code descriptors, and "claims with a test score or written report code billed without a test administration code will be denied" — medi-cal.ca.gov.
- Computed from the CMS Physician Fee Schedule relative value file RVU26C and the 2026 geographic practice cost indices, non-facility, using the non-qualifying-APM conversion factor of 33.4009 — cms.gov. Medicare pays 80% after the Part B deductible; the patient share is 20%.
- California Health & Safety Code §1374.72(a)(3)(A) — ca.gov.
- Health Net / MHN California, position statement on authorisation of psychological and neuropsychological testing — healthnet.com.
- Medi-Cal Provider Manual, NSMHS frequency limits: 96130 one per year, 96131 two per year, 96136 one per year, 96137 nine per year, "any provider" — medi-cal.ca.gov.
- California Education Code §56321(a) (15 days) and §56302.1(a) / §56344(a) (60 days); no cost per §56031(a) and 34 CFR §300.17 — leginfo.legislature.ca.gov.
All figures checked 17 August 2026.