N64 | 
		  | 
		Other disorders of breast   | 
	
	
		 |  | 
		
	
		| Excludes2 | 
		mechanical complication of breast prosthesis and implant (T85.4-)
  | 
	 
 
 | 
	
 |  | 
	
		 N64.0 | 
		 | 
		Fissure and fistula of nipple | 
	 
  | 
 |  | 
	
		 N64.1 | 
		  | 
		Fat necrosis of breast | 
	 
	
		 |  | 
		
| Fat necrosis (segmental) of breast |  	
		| CodeFirst | 
		breast necrosis due to breast graft (T85.898)
  | 
	 
	
		| nonPrimary | 
		Yes
  | 
	 
 
 | 
	   | 
 |  | 
	
		 N64.2 | 
		 | 
		Atrophy of breast | 
	 
  | 
 |  | 
	
		 N64.3 | 
		 | 
		Galactorrhea not associated with childbirth | 
	 
  | 
 |  | 
	
		 N64.4 | 
		 | 
		Mastodynia | 
	 
  | 
 |  | 
	
		 N64.5 | 
		  | 
		Other signs and symptoms in breast | 
	 
	
		 |  | 
		
	
		| Excludes2 | 
		abnormal findings on diagnostic imaging of breast (R92.-)
  | 
	 
 
 | 
	  |  | 
	
		 N64.51 | 
		 | 
		Induration of breast | 
	 
  |   |  | 
	
		 N64.52 | 
		  | 
		Nipple discharge | 
	 
	
		 |  | 
		
	
		| Excludes1 | 
		abnormal findings in nipple discharge (R89.-)
  | 
	 
 
 | 
	   |   |  | 
	
		 N64.53 | 
		 | 
		Retraction of nipple | 
	 
  |   |  | 
	
		 N64.59 | 
		 | 
		Other signs and symptoms in breast | 
	 
  |    | 
 |  | 
	
		 N64.8 | 
		 | 
		Other specified disorders of breast | 
	 
 |  | 
	
		 N64.81 | 
		  | 
		Ptosis of breast | 
	 
	
		 |  | 
		
	
		| Excludes1 | 
		ptosis of native breast in relation to reconstructed breast (N65.1)
  | 
	 
	
		| age | 
		Adult: [15-124]
  | 
	 
 
 | 
	   |   |  | 
	
		 N64.82 | 
		  | 
		Hypoplasia of breast | 
	 
	
		 |  | 
		
| Micromastia |  	
		| Excludes1 | 
		congenital absence of breast (Q83.0) hypoplasia of native breast in relation to reconstructed breast (N65.1)
  | 
	 
	
		| age | 
		Adult: [15-124]
  | 
	 
 
 | 
	   |   |  | 
	
		 N64.89 | 
		  | 
		Other specified disorders of breast | 
	 
	
		 |  | 
		
| Galactocele |  | Subinvolution of breast (postlactational) |   
 | 
	   |    | 
 |  | 
	
		 N64.9 | 
		 | 
		Disorder of breast, unspecified | 
	 
  |