ICD-10-CM > D50-D89 > D80-D89 > D84 > D84.8 D84.8 Other specified immunodeficiencies Non-Billable/Non-Specific Codes D84.81Immunodeficiency due to conditions classified elsewhereD84.82Immunodeficiency due to drugs and external causesD84.821Immunodeficiency due to drugsD84.822Immunodeficiency due to external causesD84.89Other immunodeficiencies