Aetna does cover neuropsychological testing when the evaluation meets the medical necessity criteria in Clinical Policy Bulletin 0158. Coverage turns on why the testing is being ordered, the diagnosis involved, and whether the tests themselves are validated, current, and non-redundant. Testing requested for school accommodations, employment, disability benefits, or legal purposes is specifically excluded, which is where many families and patients get caught off guard.
When Aetna Considers Testing Medically Necessary
Aetna requires several baseline conditions before any neuropsychological evaluation qualifies as medically necessary. The hours requested have to be reasonable for the clinical questions being asked. The tests used have to be validated for the specific diagnostic purpose and for the patient’s age. The versions have to be current. And the tests cannot duplicate one another.
Beyond those baseline rules, the evaluation needs to fit one of a few recognized clinical pictures. The clearest path to coverage is cognitive assessment tied to a neurological or medical condition: traumatic brain injury, stroke, neurosurgery, epilepsy, hydrocephalus, or AIDS. Testing done to build a rehabilitation plan after a diagnosed neurological disorder is covered, as is testing to separate psychological from neurological causes of symptoms, or to track cognitive decline from a known neurological condition.
On the psychiatric side, Aetna covers testing in two situations. The first is when a patient has already had a thorough diagnostic evaluation and the clinician still cannot identify a specific psychiatric diagnosis. The second is when someone has tried multiple medications and therapy approaches without meaningful progress and the testing results would change the treatment plan. In both cases, the point is that standard interviews and observation were not enough to answer the question.
ADHD and Autism
These are two of the most common reasons families call about testing, and Aetna handles them very differently.
For straightforward ADHD, Aetna’s position is that neuropsychological testing is rarely medically necessary. The insurer views ADHD as a clinical diagnosis best made through history-taking, structured interviews, and rating scales such as the Conners Rating Scales. Testing can be covered when the clinician needs to separate ADHD from a learning disability or language disorder and the distinction has not become clear through a standard history and exam, or when the case is neurologically complicated by something like a prior head injury or seizures.
For autism spectrum disorder, Aetna is more open. Neuropsychological or psychological testing that uses standardized parent interviews and direct structured behavioral observation is considered medically necessary for diagnosing pervasive developmental disorders. Named tools include the Autism Diagnostic Interview-Revised, the Autism Diagnostic Observation Schedule (ADOS-2), and the Childhood Autism Rating Scale. Developmental or intelligence testing that produces separate verbal and nonverbal scores is also covered in this context.
What Aetna Will Not Cover
The exclusion list is long, and it is the reason many requests get denied even when the testing itself is reasonable:
- Educational testing, including evaluations for school accommodations or special education eligibility. Aetna treats this as the school system’s responsibility under state and federal law.
- Testing for employment, disability benefits, workplace evaluations, or court-ordered and forensic purposes. Aetna does not consider these “treatment of disease.”
- Neuropsychological testing done solely to clear a patient for surgery.
- Diagnostic assessment for “neurodiversity,” which Aetna now explicitly classifies as not medically necessary, citing a lack of evidence for clinical value.
- Testing while the patient is actively using substances, in acute withdrawal, or newly in recovery, because the results would be unreliable.
- Testing to manage chronic fatigue syndrome or to evaluate migraines. Psychological testing may still be used to tell CFS apart from a psychiatric diagnosis.
- Computerized assessment devices such as Cognitrax, which Aetna classifies as experimental, investigational, or unproven for screening healthy individuals and for other uses including tracking cognitive impairment in multiple sclerosis.
Medical Benefit or Mental Health Benefit
Which side of your plan pays depends on the diagnosis under evaluation. Testing ordered for a medical condition like Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, traumatic brain injury, or stroke falls under the medical benefit. Testing tied to a psychiatric diagnosis or serious mental illness falls under the mental health benefit. That distinction affects your wallet, because deductibles, copays, and out-of-pocket maximums can differ between the two categories depending on the plan.
Does Aetna Require Prior Authorization
It depends on the plan. For standard commercial plans, Aetna removed psychological and neuropsychological testing from its behavioral health precertification list as of January 1, 2019, so most commercial members do not need preapproval. Some plans still require it. The Virginia Tech student health plan administered by Aetna, for example, requires precertification for neuropsychological testing and applies a $200 penalty per service when it is not obtained. Aetna Better Health Medicaid managed care plans in states including Oklahoma and Illinois have their own prior authorization forms for this testing.
The safest step is to call the number on your member ID card before scheduling, or have the ordering provider check Aetna’s CPT code lookup tool for your specific plan.
What You’ll Pay
Aetna does not publish a standard copay or coinsurance for neuropsychological testing because the numbers depend on your plan. Your benefit documents or a call to Member Services will give you the actual figures.
If your plan includes out-of-network coverage, Aetna typically pays a percentage of a “recognized” or “allowed” amount rather than the provider’s full billed charge. An out-of-network provider can bill you for the difference, and those balance-billed amounts do not count toward your deductible or out-of-pocket maximum. Out-of-network deductibles are also generally higher than in-network deductibles.
If Your Testing Is Denied
Denials can be appealed, and the numbers suggest it is worth doing. An analysis of more than 51,000 external appeal cases closed in New York between 2019 and 2025 found that 51.1% of Aetna denials were overturned at the independent review organization level. Mental health service denials were overturned 60.6% of the time, and denials involving central nervous system or neuromuscular disorders were overturned 53.1% of the time.
You have 180 days from the denial notice to file. Appeals can go in by phone, by mail, or through the online member portal. Include your group name, member ID, and supporting clinical documentation: medical records, office notes, and the ordering provider’s written explanation of why the testing is medically necessary.
Decision timelines follow your plan’s appeal structure:
- One-level appeal plans: 30 days for pre-service claims, 60 days for post-service claims.
- Two-level appeal plans: 15 days for pre-service and 30 days for post-service at each level. You have 60 days after a first-level decision to request a second review.
- Urgent claims, when a physician confirms that delay poses a health risk: 72 hours for one-level plans, 36 hours for two-level plans.
If you exhaust Aetna’s internal appeals and the denial still stands, you can request an external review by an independent third party under Affordable Care Act protections.