K64.5Perianal venous thrombosis
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 XI
- Diseases of the digestive system
- Group K55-K64
- Other diseases of intestines
- Official Vietnamese name
- Huyết khối tĩnh mạch quanh hậu môn
- Additional WHO coding guidance
- Perianal haematoma
Related K64 codes
K64
Haemorrhoids and perianal venous thrombosis
K64.0
Primary diagnosis candidate
First degree haemorrhoids
K64.1
Primary diagnosis candidate
Second degree haemorrhoids
K64.2
Primary diagnosis candidate
Third degree haemorrhoids
K64.3
Primary diagnosis candidate
Fourth degree haemorrhoids
K64.4
Primary diagnosis candidate
Residual haemorrhoidal skin tags
K64.8
Primary diagnosis candidate
Other specified haemorrhoids
K64.9
Primary diagnosis candidate
Haemorrhoids, 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.
