|  | 
	
		 D84.8 | 
		 | 
		Other specified immunodeficiencies | 
	 
 |  | 
	
		 D84.81 | 
		  | 
		Immunodeficiency due to conditions classified elsewhere | 
	 
	
		 |  | 
		
	
		| CodeFirst | 
		underlying condition, such as: chromosomal abnormalities (Q90-Q99) diabetes mellitus (E08-E13) malignant neoplasms (C00-C96)
  | 
	 
	
		| Excludes1 | 
		certain disorders involving the immune mechanism (D80-D83, D84.0, D84.1, D84.9) human immunodeficiency virus [HIV] disease (B20)
  | 
	 
 
 | 
	   |   |  | 
	
		 D84.82 | 
		 | 
		Immunodeficiency due to drugs and external causes | 
	 
 |  | 
	
		 D84.821 | 
		  | 
		Immunodeficiency due to drugs | 
	 
	
		 |  | 
		
| Immunodeficiency due to (current or past) medication |  	
		| UseAdditionalCode | 
		code for adverse effect if applicable, to identify adverse effect of drug (T36-T50 with fifth or six character 5)
  | 
	 
	
		| UseAdditionalCode | 
		code, if applicable, for associated long term (current) drug therapy drug or medication such as: long term (current) drug therapy systemic steroids (Z79.52) other long term (current) drug therapy (Z79.899)
  | 
	 
 
 | 
	   |   |  | 
	
		 D84.822 | 
		  | 
		Immunodeficiency due to external causes | 
	 
	
		 |  | 
		
	
		| CodeAlso | 
		, if applicable, radiological procedure and radiotherapy (Y84.2)
  | 
	 
	
		| UseAdditionalCode | 
		code for external cause such as: exposure to ionizing radiation (W88)
  | 
	 
 
 | 
	   |    |   |  | 
	
		 D84.89 | 
		 | 
		Other immunodeficiencies | 
	 
  |    |