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International Classification of Diseases 11 (ICD11)

Below is a summary of changes from ICD 10 to ICD 11 as listed in the Nov 2015 newsletter.

New Chapters

• Chapter 3 Diseases of the Blood and Blood forming Organs
• Chapter 4 Disorders of the Immune System.
• Chapter 5 Conditions related to Sexual Health.
• Chapter 8 Sleep-Wake Disorders
• Chapter 26 Extension codes
• Chapter 27 Traditional Medicine

New Concepts

• Foundation: Everything in ICD
• Entity: Each element in the foundation
• Linearization: also known as a Classification
• Stem code: Category (includes former ‘dagger’ codes)
• Extension code: Additional information
• Linearization parents: Classification hierarchy, Chapter, Block, Category Content Model
• ICD-11 categories have a short and a long definition.
• All ICD-11 categories include separate information on anatomy, aetiology, and other aspects. These can be accessed through searches, or when browsing in the tabular list.

New Coding Scheme

• The chapter numbering: now arabic numbers, not roman numerals
• The coding scheme for categories: now minimum 4 characters, 2 levels of subcategories
• Asterisk codes become Clinical forms or Extension codes. Additional sub-classifications become Extension codes

Terminology

• ICD-10 had a range of expressions to describe a causal relationship between conditions in a code title. In ICD 11, the preferred term is “due to”.
• ICD-10 had a range of expressions indicating the coincidence of two conditions in a code title (e.g. “in” or “with”). In ICD-11, the preferred term is “associated with”.

Links: International Classification of Diseases | [ http://www.who.int/classifications/icd/en/ WHO - ICD]

Reference

• Cartoon source - http://www.who.int/classifications/icd/revision/icdprojectplan2015to2018.pdf?ua=1
• Update Newsletter (Nov 2015) - http://www.who.int/classifications/icd/revision/2015_11_ICD11_Newsletter.pdf?ua=1