How Long Does It Take to Get an ADHD Diagnosis?
Reviewed by Josie Desmarais, PMHNP-BC · Board-Certified Psychiatric-Mental Health Nurse Practitioner · Last updated June 2026
A structured psychiatric evaluation is the fastest route to an accurate adult ADHD diagnosis.
For most adults, getting an ADHD diagnosis takes two to four weeks from the first phone call to a confirmed diagnostic conclusion — and the bulk of that time is calendar wait between appointments, not active testing. The clinical work itself fits inside a single 30-to-60-minute psychiatric evaluation, with TOVA testing adding roughly an hour when clinically indicated. At Trust Psychiatry – Mental Health West Palm Beach in West Palm Beach, the realistic timeline from intake call to documented diagnosis is one to three weeks for telehealth-only evaluations and two to four weeks when in-office TOVA testing is part of the plan.
Related reading: ADHD burnout recovery and caffeine and ADHD. If symptoms are affecting your daily life, our psychiatric evaluation services can help.
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Reviewed by · Board-Certified Psychiatric-Mental Health Nurse Practitioner
Josie Desmarais is a board-certified psychiatric-mental health nurse practitioner (PMHNP-BC) at Trust Psychiatry – Mental Health West Palm Beach. She provides psychiatric evaluation and medication management, and helps patients understand how a comprehensive psychiatric evaluation guides mental-health care, through secure telepsychiatry for adults across Florida.