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ALL MEDICAL CODES IN CATEGORY Certain disorders involving the immune mechanism (D80-D89)Includes:defects in the complement systemimmunodeficiency disorders, except human immunodeficiency virus [HIV] diseasesarcoidosisExcludes1:autoimmune disease (systemic) NOS (M35.9)functional disorders of polymorphonuclear neutrophils (D71)human immunodeficiency virus [HIV] disease (B20)

2025 ICD-10-CM code D84.9

Unspecified immunodeficiency. This code is used when the provider does not document the specific type of immunodeficiency.