Changes from ICD-10 to ICD-11 and future directions in psychiatric classification


Area of Science:

• Psychiatry
• Medical Classification Systems
• Mental Health

Background:

• The International Classification of Diseases (ICD) is a standard diagnostic tool for epidemiology, health management, and clinical purposes.
• ICD-10 classification for mental, behavioral, and neurodevelopmental disorders has been in use for several decades.
• Continuous updates are necessary to reflect advancements in scientific understanding and clinical practice.

Purpose of the Study:

• To provide an overview of the key changes in the classification of mental, behavioral, or neurodevelopmental disorders from ICD-10 to ICD-11.
• To review evidence from field studies on the reliability and clinical utility of ICD-11.
• To discuss the implications of these changes and propose future directions for psychiatric nosology.

Main Methods:

• Comparative analysis of ICD-10 and ICD-11 diagnostic categories and criteria for mental disorders.
• Review of published evaluative field studies assessing ICD-11's performance.
• Discussion of alternative approaches to psychiatric classification.

Main Results:

• ICD-11 introduces a new chapter structure, novel diagnostic categories, revised criteria, and incorporates dimensional aspects.
• Field studies suggest preliminary evidence of higher reliability and clinical utility for ICD-11 compared to ICD-10.
• Despite revisions, both systems remain largely categorical in their classification of mental phenomena.

Conclusions:

• ICD-11 represents an evolution from ICD-10, offering improvements in diagnostic classification for mental disorders.
• The integration of dimensional elements alongside categorical ones addresses diverse user needs.
• Further expansion of the stepwise diagnostic approach in ICD-11 is recommended to enhance its applicability.