| ICD-10 Code | Description |
| M31.0 | Hypersensitivity angiitis |
| M31.10 | Thrombotic microangiopathy, unspecified |
| M31.11 | Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] |
| M31.19 | Other thrombotic microangiopathy |
| M31.2 | Lethal midline granuloma |
| M31.30 | Wegener's granulomatosis without renal involvement |
| 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 |
| M31.8 | Other specified necrotizing vasculopathies |
| M31.9 | Necrotizing vasculopathy, unspecified |
