What if it's not ADHD?

Some people leave an ADHD evaluation relieved. Others leave confused or disappointed, especially if they had spent months reading about ADHD and recognizing themselves in it. If you were told that ADHD does not explain your symptoms, or does not fully explain them, this page sets out what that can mean and what to do next.

Four possible outcomes that are not a simple "yes"

When something else explains it

Trouble concentrating is a symptom of many conditions, not only ADHD. The CDC lists sleep disorders, anxiety, depression and certain types of learning disabilities among conditions that can have similar symptoms. A 2024 review in American Family Physician notes the substantial overlap of symptoms with other mental disorders and names anxiety, mood and substance use disorders. NIMH says evaluators ask about mood and current and past medical conditions specifically to rule out alternative diagnoses.

Some of the explanations an evaluation may point to:

• Sleep problems. The National Heart, Lung, and Blood Institute lists daytime sleepiness and tiredness, which can lead to problems with learning, focusing and reacting, among the symptoms of sleep apnea. See ADHD or sleep apnea.
• Thyroid conditions. NIDDK lists fatigue and depression among symptoms of an underactive thyroid, and nervousness, irritability and trouble sleeping among symptoms of an overactive one. NIDDK also notes that common symptoms like fatigue do not necessarily mean a thyroid problem. See ADHD or thyroid problems.
• Anxiety and depression. Both are on the CDC's list of conditions with symptoms similar to ADHD, and both can also occur together with it. See ADHD or anxiety and ADHD or depression.
• Learning disabilities. The CDC includes certain learning disabilities on the same list. See ADHD or a learning disability.
• Substances and medications. The American Family Physician review names substance use disorders among conditions to consider, so tell the clinician about everything you use. See ADHD or substance effects.
• Chronic stress or burnout. Stress is not a diagnosis in itself, but it is one of the explanations an evaluation weighs. See ADHD or burnout and stress.

Finding one of these is not a consolation prize. Each has its own treatment path, and treating the right thing is what changes daily life.

When it is ADHD and something else

NIMH notes that ADHD often co-occurs with other mental disorders and can make them harder to treat, and that sleep problems affect up to 70% of adults with ADHD. UK guidance from NICE says the symptoms should not be explained by another psychiatric diagnosis, "although there may be other coexisting psychiatric conditions." So a finding of anxiety or depression does not automatically rule ADHD out. If you were told both are present, ask the clinician how they plan to sequence treatment and what they will watch for.

When symptoms fall short of the criteria

ADHD criteria set a threshold: for adults, five or more symptoms in a domain, starting before age 12, with problems in at least two areas of life, according to NIMH. Plenty of people have some symptoms without crossing it. In a 2017 study of a DSM-5 screener, the authors described a clinic sample with a high proportion of patients who had a meaningful number of symptoms but did not meet full diagnostic criteria.

Not meeting criteria does not mean nothing is wrong. It means the label does not fit. Ask the clinician what they would suggest for the symptoms you do have: skills, workplace or study adjustments, treatment of a sleep or mood problem, or a follow-up visit if things change.

When the answer is "not yet"

Childhood history is often the missing piece. NIMH notes that diagnosing ADHD in adults is complicated by the need to show symptoms before age 12, so a diagnosis relies heavily on past reports of behavior. A 2002 study in the American Journal of Psychiatry found that adults' own recall of childhood ADHD symptoms was often inaccurate, and stressed the importance of information recorded at the time. If the evaluator needs more, the guide on asking family about childhood symptoms and the New York guide's article on evaluation without childhood records can help.

Questions to ask before you leave

• What do you think is causing these problems?
• Which parts of ADHD did I meet, and which did I not?
• What did you rule out, and how? Is any medical testing worth doing?
• What treatment do you recommend for what you found, and who provides it?
• Under what circumstances would you want to reassess?

Getting a second opinion

If the explanation does not make sense to you, or the evaluation felt rushed, a second opinion is reasonable. Bring your records. In New York, Public Health Law section 18 requires a provider to give you the chance to inspect your records within ten days of a written request, and caps paper copy charges at 75 cents a page. In New Jersey, N.J.A.C. 13:35-6.5 requires physicians to provide records to a patient within 30 days of a request. See a second opinion on an ADHD diagnosis.

The emotional side

It is common to feel let down when a long-held explanation does not fit. Give yourself time with it. The goal of an evaluation was never a particular label; it was understanding why life feels harder than it should and finding what helps. If you are struggling with your mood or thinking about harming yourself, call or text 988. The 988 Lifeline is free, confidential and available 24/7/365.

When to talk to a clinician

If you have not been evaluated yet and are worried about the result, it is still worth going. A careful evaluation helps either way: it confirms ADHD, finds something else, or both. If you have been evaluated and still have questions, a second clinician can review the findings with fresh eyes.

Dr. John C. Shershow, M.D. is a psychiatrist who focuses on adult ADHD and sees adults located in New York or New Jersey. His adult ADHD evaluation looks at other explanations such as anxiety, depression, sleep problems and stress, or whether they are present alongside ADHD. See adult ADHD testing in NYC or in New Jersey, or start with the adult ADHD self-test. To ask about an appointment, call the office or use the call-back form.