What Does the “18-Point ADHD Rule-Out Checklist” Include?

PostedSeptember 10, 2025

UpdatedSeptember 10, 2025

ByMy Patient Advice

Author: Harriet Winslow, BSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

The ADHD rule-out checklist contents are designed to help clinicians assess whether a person’s symptoms align with ADHD or if another condition could be responsible. The 18-item assessment tool is used to screen for key symptoms of ADHD, including inattention, hyperactivity, and impulsivity. This screening checklist is an essential part of the adult ADHD screening process, helping healthcare providers determine if further evaluation is needed.

The 18-point ADHD rule-out checklist includes questions that examine the frequency and impact of common ADHD symptoms. These questions are specifically aimed at identifying issues such as difficulty focusing, impulsivity, and restlessness. By assessing how often these symptoms occur in daily life, healthcare professionals can evaluate whether the symptoms are consistent with ADHD or if another condition is at play, such as anxiety, depression, or sleep disorders.

Common Symptoms

Inattention

The ADHD rule-out checklist contents help evaluate whether difficulties in focusing are severe enough to suggest ADHD or if they may stem from another condition.

Impulsivity

The checklist assesses whether impulsive behaviours, like interrupting conversations or acting without thinking, are present frequently.

Hyperactivity

The 18-item assessment tool looks for signs of restlessness, helping to distinguish ADHD from other conditions that might cause similar symptoms.

By carefully reviewing the ADHD rule-out checklist contents, clinicians can make an informed decision about the need for further tests or assessments to confirm an ADHD diagnosis.

Visit providers like ADHD Certify for personal consultations and expert advice tailored to your needs.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Rule-outs for other conditions.

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.