Skip to content

Loading...

Adult Identification & Diagnosis

Adult Identification & Diagnosis

Some people first explore autism or receive a diagnosis in adulthood. Ask potential providers whether they assess adults, what history is required, what the evaluation costs, and what follow-up support is available.

Based on NIMH · All sources · Checked November 3, 2026

Specialistsadults can be referred to a neuropsychologist, psychologist, or psychiatrist experienced with autismNIMH
Overlapsome characteristics can overlap with anxiety or ADHD, so evaluation takes careNIMH
Strengthsa diagnosis can help people understand past challenges and identify strengthsNIMH

Why adult diagnosis can be harder

Diagnosing autism in adults is often more difficult than diagnosing it in children. In adults, some autism characteristics can overlap with conditions such as anxiety or attention-deficit/hyperactivity disorder (ADHD).

How to start

Adults who wonder whether they may be on the autism spectrum can talk with a health care provider and ask for a referral for an autism evaluation. Adults can be referred to a neuropsychologist, psychologist, or psychiatrist who has experience with autism. The expert will ask about:

  • Social interaction and communication challenges
  • Sensory issues
  • Repetitive behaviors
  • Restricted interests

The evaluation may also include a conversation with family members about early developmental history.

Why it can help

A correct diagnosis as an adult can help people understand past challenges, identify personal strengths, and find the right kind of help. Research on the most helpful services for autistic transition-age youth and adults is ongoing.

Questions to ask a provider

  • Do you assess adults?
  • What history or records do you need?
  • What does the evaluation cost?
  • What follow-up support is available?
Sources

Adapted from the National Institute of Mental Health, “Autism Spectrum Disorder,” revised 2025. Our website’s presentation does not imply NIMH endorsement.

Sources checked: November 3, 2026

This website provides general educational information. It does not diagnose autism or replace individualized medical, developmental, psychological, or educational advice. Screening is not diagnosis.

External listings do not imply affiliation, endorsement, or guaranteed services. Eligibility, availability, costs, and insurance coverage may change. Research summaries reflect evidence available at the time of review.