# What is an ADHD evaluation?

What an ADHD evaluation is, who performs one, what happens during the assessment, and what the written report contains.

Updated 2026-10-02. Also on the [web page](https://adhdevaluations.fyi/guides/what-is-an-adhd-evaluation).

An ADHD evaluation is a structured assessment that answers a specific
question: does this person have attention-deficit/hyperactivity disorder,
and what does that mean for how they are supported? It is different from a
screening questionnaire or a short office visit. A screening points in a
direction; an evaluation produces a clinical opinion backed by several
types of evidence, and it ends in a written report.

An evaluation is not a neuropsychological assessment, and the two are often
confused. A neuropsychological assessment looks broadly at how someone
thinks, remembers and learns, and it is one route to an ADHD diagnosis. An
ADHD evaluation is narrower: it is built around the criteria for ADHD, and
it usually also screens for the conditions that commonly travel with ADHD,
such as anxiety, depression and learning differences, so the report does
not mistake one for another.

Most evaluations follow the same shape. The clinician starts with a
clinical interview about current difficulties, development history and, for
children and teens, behaviour at school and at home. They collect
questionnaires from the person being evaluated and, where it is relevant,
from parents, teachers or partners. They then administer standardized
measures: rating scales of attention and executive function, and often
computer-based attention tasks and brief cognitive tests. The evaluation
considers all of it together against the diagnostic criteria rather than
any single score.

For children and adolescents the process usually takes three to six
sessions spread over several weeks, because the clinician needs input from
the school and from home. For adults it is often two sessions plus
questionnaires. The report that follows restates the referral question,
summarizes what was gathered, states whether the criteria for ADHD are
met, and lists practical recommendations: treatment options, workplace or
school accommodations, and what to monitor over time.

The report matters beyond the diagnosis. It is the document schools and
workplaces rely on for accommodations such as a 504 plan or an Americans
with Disabilities Act accommodation, and many prescribers want to see it
before they start medication. Ask the evaluator up front whether their
report meets the policy for the accommodation you are seeking, and whether
they write reports for the specific institution involved.

Every provider on this site practices from an address that is public in the
CMS NPI Registry. The registry records where they practice and their
published credentials. It does not record prices, wait times or which
insurers they work with, so this site leaves those fields empty until a
clinic claims its listing and fills them in itself.

## Questions

### Who performs an ADHD evaluation?

Clinical neuropsychologists, clinical psychologists, psychiatrists and some nurse practitioners and physician assistants. Most formal evaluations for adults are done by a clinical neuropsychologist or clinical psychologist with training in assessment.

### How long does an ADHD evaluation take?

Usually several hours across two or more sessions, including an interview, rating scales and cognitive testing. Ask the provider for their exact process before you book.

### What is the difference between an ADHD screening and an evaluation?

A screening is a short questionnaire that suggests whether further assessment is worth it. An evaluation is a formal assessment with an interview, standardized measures and a written report.