|  M31 |  | Other necrotizing vasculopathies   | 
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		|  M31.0 |  | Hypersensitivity angiitis |  
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		|  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)
 
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		| 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)
 
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		|  M31.19 |  | Other thrombotic microangiopathy |  
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| Thrombotic thrombocytopenic purpura |  |  |  | 
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		|  M31.2 |  | Lethal midline granuloma |  | 
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		|  M31.3 |  | Wegener's granulomatosis |  
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| 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] |  | 
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		|  M31.5 |  | Giant cell arteritis with polymyalgia rheumatica |  | 
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		|  M31.6 |  | Other giant cell arteritis |  | 
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		|  M31.7 |  | Microscopic polyangiitis |  
		|  |  | 
| Microscopic polyarteritis |  
		| Excludes1 | polyarteritis nodosa (M30.0) 
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		|  M31.8 |  | Other specified necrotizing vasculopathies |  
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| Hypocomplementemic vasculitis |  | Septic vasculitis |  |  | 
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		|  M31.9 |  | Necrotizing vasculopathy, unspecified |  |