M31Other necrotizing vasculopathies
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use M31 directly
Use the most specific code supported by the record.
- Chapter XIII
- musculoskeletal system and connective tissue
- Group M30-M36
- tissue disorders
- Official Vietnamese name
- Bệnh lý mạch máu hoại tử khác
Related M31 codes
M31.1
Primary diagnosis candidate
Thrombotic microangiopathy
M31.3
Primary diagnosis candidate
Wegener granulomatosis
M31.4
Primary diagnosis candidate
Aortic arch syndrome [Takayasu]
M31.5
Primary diagnosis candidate
Giant cell arteritis with polymyalgia rheumatica
M31.6
Primary diagnosis candidate
Other giant cell arteritis
M31.7
Primary diagnosis candidate
Microscopic polyangiitis
M31.8
Primary diagnosis candidate
Other specified necrotizing vasculopathies
M31.9
Primary diagnosis candidate
Necrotizing vasculopathy, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
