ICD-10 block

D80–D89 Certain disorders involving the immune mechanism

The block D80–D89 of ICD-10 is titled “Certain disorders involving the immune mechanism”. It is part of Chapter III, Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism, and holds 7 groups.

What D80–D89 includes

Conditions and terms that are coded here.

  • defects in the complement system
  • immunodeficiency disorders, except human immunodeficiency virus [HIV] disease
  • sarcoidosis

What D80–D89 excludes

Conditions that look similar but belong under another code.

  • autoimmune disease (systemic) NOS M35.9
  • functional disorders of polymorphonuclear neutrophils D71
  • human immunodeficiency virus [HIV] disease B20-B24
  • human immunodeficiency virus [HIV] disease complicating pregnancy childbirth and the puerperium O98.7

Codes in D80–D89

Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.

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