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Table 2 New chapters and sections in ICD-11-MMS

From: ICD-11: an international classification of diseases for the twenty-first century

Title

Reason for addition

Chapter 3: Diseases of the blood or blood-forming organs

Chapter 4: Diseases of the immune system

These two chapters were split from a single chapter in ICD-10, recognizing differences in etiology, manifestations, and care

Chapter 7: Sleep–wake disorders

This topic has become more prominent since the 10th revision. The chapter mostly includes new concepts with some concepts moved from other chapters in ICD-10

Chapter 17: Conditions related to sexual health

This topic has become more prominent since the 10th revision. The chapter mostly includes concepts moved from other chapters in ICD-10, combined with some new concepts

Chapter 26: Traditional medicine conditions

This entirely new supplementary chapter in ICD-11 enables coding in terms of traditional medicine concepts, where required

Extension codes section

Codes in this section can be combined with a stem code to provide additional information

Functioning section

Some national modifications of ICD-10 added sections to allow patient functioning to be recorded. ICD-11 provides a supplementary section for functioning assessment, aligned with the WHO International Classification of Functioning