K04.1Necrosis of pulp
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 K00-K14
- Diseases of oral cavity, salivary glands and jaws
- Official Vietnamese name
- Hoại tử tủy răng
- Additional WHO coding guidance
- Pulpal gangrene
Related K04 codes
K04
Diseases of pulp and periapical tissues
K04.0
Primary diagnosis candidate
Pulpitis
K04.2
Primary diagnosis candidate
Pulp degeneration
K04.3
Primary diagnosis candidate
Abnormal hard tissue formation in pulp
K04.4
Primary diagnosis candidate
Acute apical periodontitis of pulpal origin
K04.5
Primary diagnosis candidate
Chronic apical periodontitis
K04.6
Primary diagnosis candidate
Periapical abscess with sinus
K04.7
Primary diagnosis candidate
Periapical abscess without sinus
K04.8
Primary diagnosis candidate
Radicular cyst
K04.9
Primary diagnosis candidate
Other and unspecified diseases of pulp and periapical tissues
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.
