I31.1Chronic constrictive pericarditis
Code usage status
Primary diagnosis
May be used as the primary diagnosis
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Complete code in the classification
Use when the diagnosis matches and no exclusion applies.
- Chapter IX
- Diseases of the circulatory system
- Group I30-I52
- Other forms of heart disease
- Official Vietnamese name
- Viêm màng ngoài tim co thắt mạn tính
- Additional WHO coding guidance
- Concretio cordis Pericardial calcification
Related I31 codes
I31
Other diseases of pericardium
I31.0
Primary diagnosis candidate
Chronic adhesive pericarditis
I31.2
Primary diagnosis candidate
Haemopericardium, not elsewhere classified
I31.3
Primary diagnosis candidate
Pericardial effusion (noninflammatory)
I31.8
Primary diagnosis candidate
Other specified diseases of pericardium
I31.9
Primary diagnosis candidate
Disease of pericardium, 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.
