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How Does the DSM-5 Define the Severity Levels of ADHD? 

The ADHD severity DSM-5 classification provides an important framework for clinicians to assess the impact of ADHD on an individual’s life. According to the severity criteria in the DSM-5, ADHD is classified into three levels: mild, moderate, and severe. These levels are determined based on the number and intensity of symptoms, as well as the degree of impairment they cause in daily functioning. 

Mild ADHD

It refers to cases where only a few symptoms are present, and the symptoms cause relatively minor interference in social, academic, or occupational functioning. 

Moderate ADHD

It involves a greater number of symptoms, and there is noticeable difficulty in functioning in more than one area of life. 

Severe ADHD

It is characterised by many symptoms that cause significant impairment across multiple aspects of life, such as at home, in school, or in work environments. 

The ADHD severity DSM-5 framework allows for more accurate and individualised treatment plans. By identifying the severity of the condition, clinicians can adjust their approach to care, choosing appropriate interventions based on the individual’s needs. This helps ensure that those with ADHD receive the level of support they require. 

How It Helps 

The severity criteria of ADHD provide clarity in diagnosing and managing the condition. It enables healthcare providers to better understand the scope of ADHD’s impact, guiding effective treatments for different ADHD levels and improving the overall quality of care. 

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 DSM-5 Diagnostic Guidelines.  

Harriet Winslow, BSc - My patient advice author - mypatientadvice.co.uk

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, author and a reviewer for my patient advice - mypatientadvice.co.uk

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.