M31 | 
		 | 
		Other necrotizing vasculopathies   | 
	
 |  | 
	
		 M31.0 | 
		  | 
		Hypersensitivity angiitis | 
	 
	
		 |  | 
		
 | 
	   | 
 |  | 
	
		 M31.1 | 
		 | 
		Thrombotic microangiopathy | 
	 
 |  | 
	
		 M31.10 | 
		 | 
		Thrombotic microangiopathy, unspecified | 
	 
  |   |  | 
	
		 M31.11 | 
		  | 
		Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] | 
	 
	
		 |  | 
		
| Transplant-associated thrombotic microangiopathy [TA-TMA] |  	
		| CodeFirst | 
		if applicable: complications of bone marrow transplant (T86.0-) complications of stem cell transplant (T86.5)
  | 
	 
	
		| UseAdditionalCode | 
		code to identify specific organ dysfunction, such as: acute kidney failure (N17.-) acute respiratory distress syndrome (J80) capillary leak syndrome (I78.8) diffuse alveolar hemorrhage (R04.89) encephalopathy (metabolic) (septic) (G93.41) fluid overload, unspecified (E87.70) graft versus host disease (D89.81-) hemolytic uremic syndrome (D59.3-) hepatic failure (K72.-) hepatic veno-occlusive disease (K76.5) idiopathic interstitial pneumonia (J84.11-) sinusoidal obstruction syndrome (K76.5)
  | 
	 
 
 | 
	   |   |  | 
	
		 M31.19 | 
		  | 
		Other thrombotic microangiopathy | 
	 
	
		 |  | 
		
| Thrombotic thrombocytopenic purpura |   
 | 
	   |    | 
 |  | 
	
		 M31.2 | 
		 | 
		Lethal midline granuloma | 
	 
  | 
 |  | 
	
		 M31.3 | 
		  | 
		Wegener's granulomatosis | 
	 
	
		 |  | 
		
| Granulomatosis with polyangiitis |  | Necrotizing respiratory granulomatosis |   
 | 
	  |  | 
	
		 M31.30 | 
		  | 
		Wegener's granulomatosis without renal involvement | 
	 
	
		 |  | 
		
| Wegener's granulomatosis NOS |   
 | 
	   |   |  | 
	
		 M31.31 | 
		 | 
		Wegener's granulomatosis with renal involvement | 
	 
  |    | 
 |  | 
	
		 M31.4 | 
		 | 
		Aortic arch syndrome [Takayasu] | 
	 
  | 
 |  | 
	
		 M31.5 | 
		 | 
		Giant cell arteritis with polymyalgia rheumatica | 
	 
  | 
 |  | 
	
		 M31.6 | 
		 | 
		Other giant cell arteritis | 
	 
  | 
 |  | 
	
		 M31.7 | 
		  | 
		Microscopic polyangiitis | 
	 
	
		 |  | 
		
| Microscopic polyarteritis |  	
		| Excludes1 | 
		polyarteritis nodosa (M30.0)
  | 
	 
 
 | 
	   | 
 |  | 
	
		 M31.8 | 
		  | 
		Other specified necrotizing vasculopathies | 
	 
	
		 |  | 
		
| Hypocomplementemic vasculitis |  | Septic vasculitis |   
 | 
	   | 
 |  | 
	
		 M31.9 | 
		 | 
		Necrotizing vasculopathy, unspecified | 
	 
  |