E66 | 
		  | 
		Overweight and obesity   | 
	
	
		 |  | 
		
	
		| CodeFirst | 
		obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-)
  | 
	 
	
		| UseAdditionalCode | 
		code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-)
  | 
	 
	
		| Excludes2 | 
		adiposogenital dystrophy (E23.6) lipomatosis dolorosa [Dercum] (E88.2) lipomatosis NOS (E88.2) Prader-Willi syndrome (Q87.11)
  | 
	 
 
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		 E66.0 | 
		 | 
		Obesity due to excess calories | 
	 
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		 E66.01 | 
		  | 
		Morbid (severe) obesity due to excess calories | 
	 
	
		 |  | 
		
	
		| Excludes1 | 
		morbid (severe) obesity with alveolar hypoventilation (E66.2)
  | 
	 
 
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	   |   |  | 
	
		 E66.09 | 
		  | 
		Other obesity due to excess calories | 
	 
	
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	   |    | 
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		 E66.1 | 
		  | 
		Drug-induced obesity | 
	 
	
		 |  | 
		
	
		| UseAdditionalCode | 
		code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  | 
	 
	
		| invalidAdmission | 
		Yes
  | 
	 
 
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	   | 
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		 E66.2 | 
		  | 
		Morbid (severe) obesity with alveolar hypoventilation | 
	 
	
		 |  | 
		
| Obesity hypoventilation syndrome (OHS) |  | Pickwickian syndrome |   
 | 
	   | 
 |  | 
	
		 E66.3 | 
		 | 
		Overweight | 
	 
  | 
 |  | 
	
		 E66.8 | 
		  | 
		Other obesity | 
	 
	
		 |  | 
		
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	  |  | 
	
		 E66.81 | 
		 | 
		Obesity class | 
	 
 |  | 
	
		 E66.811 | 
		 | 
		Obesity, class 1 | 
	 
  |   |  | 
	
		 E66.812 | 
		 | 
		Obesity, class 2 | 
	 
  |   |  | 
	
		 E66.813 | 
		 | 
		Obesity, class 3 | 
	 
  |    |   |  | 
	
		 E66.89 | 
		 | 
		Other obesity not elsewhere classified | 
	 
  |    | 
 |  | 
	
		 E66.9 | 
		  | 
		Obesity, unspecified | 
	 
	
		 |  | 
		
| Obesity NOS |  	
		| invalidAdmission | 
		Yes
  | 
	 
 
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