D67Hereditary factor IX deficiency
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 III
- Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- Official Vietnamese name
- Thiếu hụt yếu tố IX di truyền
- Additional WHO coding guidance
- Incl.: Christmas disease Deficiency: factor IX (with functional defect) plasma thromboplastin component [PTC] Haemophilia B
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.
