| M31 | Other necrotizing vasculopathies |
| | Hypersensitivity angiitis |
| | Thrombotic microangiopathy |
| | Thrombotic microangiopathy, unspecified |
| | Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] |
| | Other thrombotic microangiopathy |
| | Lethal midline granuloma |
| | Wegener’s granulomatosis |
| | Wegener’s granulomatosis, without renal involvement |
| | Wegener’s granulomatosis, with renal involvement |
| | Aortic arch syndrome [Takayasu] |
| | Giant cell arteritis with polymyalgia rheumatica |
| | Other giant cell arteritis |
| | Microscopic polyangiitis |
| | Other specified necrotizing vasculopathies |
| | Necrotizing vasculopathy, unspecified |
