D81 Combined immunodeficienciesNon-billable header with 10 child codes.
D81.0 Severe combined immunodeficiency [SCID] with reticular dysgenesisD81.1 Severe combined immunodeficiency [SCID] with low T- and B-cell numbersD81.2 Severe combined immunodeficiency [SCID] with low or normal B-cell numbersD81.3 Adenosine deaminase [ADA] deficiencyD81.4 Nezelof's syndromeD81.5 Purine nucleoside phosphorylase [PNP] deficiencyD81.6 Major histocompatibility complex class I deficiencyD81.7 Major histocompatibility complex class II deficiencyD81.8 Other combined immunodeficienciesD81.9 Combined immunodeficiency, unspecifiedD72 Other disorders of white blood cells ("immunity disorders (D80-D89)")D84.81 Immunodeficiency due to conditions classified elsewhere ("certain disorders involving the immune mechanism (D80-D83, D84.0, D84.1, D84.9)")E79 Disorders of purine and pyrimidine metabolism ("combined immunodeficiency disorders (D81.-)")D72 Other disorders of white blood cells ("immunity disorders (D80-D89)")D84.81 Immunodeficiency due to conditions classified elsewhere ("certain disorders involving the immune mechanism (D80-D83, D84.0, D84.1, D84.9)")E79 Disorders of purine and pyrimidine metabolism ("combined immunodeficiency disorders (D81.-)")D81 Combined immunodeficiencies (this code)D81.0 Severe combined immunodeficiency [SCID] with reticular dysgenesisD81.1 Severe combined immunodeficiency [SCID] with low T- and B-cell numbersD81.2 Severe combined immunodeficiency [SCID] with low or normal B-cell numbersD81.3 Adenosine deaminase [ADA] deficiencyD81.30 Adenosine deaminase deficiency, unspecified