Chapter 4: Diseases of the Immune System
ICD-11 codes 4A00-4B4Z
A new chapter in ICD-11 covering primary immunodeficiencies, autoimmune diseases, allergic and hypersensitivity conditions, and immune system disorders. This was separated from blood diseases to reflect modern understanding of immunology.
4A00-4A0Z
No category codes found in this block.
4A20-4A4Z
No category codes found in this block.
4A60-4A6Z
No category codes found in this block.
4A80-4A8Z
No category codes found in this block.
4B00-4B4Z
No category codes found in this block.
Frequently Asked Questions
What ICD-11 codes are in Chapter 4?
Chapter 4: Diseases of the Immune System covers ICD-11 codes 4A00-4B4Z. It contains 5 code blocks with 0 top-level categories.
What conditions does ICD-11 Chapter 4 cover?
A new chapter in ICD-11 covering primary immunodeficiencies, autoimmune diseases, allergic and hypersensitivity conditions, and immune system disorders. This was separated from blood diseases to reflect modern understanding of immunology. This chapter includes codes from 4A00-4B4Z.
How is ICD-11 Chapter 4 different from ICD-10?
ICD-11 reorganized many chapters compared to ICD-10. Chapter 4 (Diseases of the Immune System) may include conditions that were in different ICD-10 chapters, and some conditions previously here may have moved. ICD-11 also adds new chapters for sleep-wake disorders, sexual health, and traditional medicine that did not exist in ICD-10.
How many code blocks are in ICD-11 Chapter 4?
Chapter 4 has 5 code blocks: 4A00-4A0Z, 4A20-4A4Z, 4A60-4A6Z, 4A80-4A8Z, and 1 more.
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