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


  • autoimmune disease (systemic) NOS (M35.9)
  • functional disorders of polymorphonuclear neutrophils (D71)
  • human immunodeficiency virus [HIV] disease (B20)
  1. D84 Other immunodeficiencies

    1. D84.0 Lymphocyte function antigen-1 [LFA-1] defect

    2. D84.1 Defects in the complement system

      Inclusion term(s):

      • C1 esterase inhibitor [C1-INH] deficiency
    3. D84.8 Other specified immunodeficiencies

      1. D84.81 Immunodeficiency due to conditions classified elsewhere

      2. D84.82 Immunodeficiency due to drugs and external causes

      3. D84.89 Other immunodeficiencies

    4. D84.9 Immunodeficiency, unspecified

      Inclusion term(s):

      • Immunocompromised NOS
      • Immunodeficient NOS
      • Immunosuppressed NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.