I44.0Atrioventricular block, first degree
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
- Blốc nhĩ thất cấp I
Related I44 codes
I44
Atrioventricular and left bundle- branch block
I44.1
Primary diagnosis candidate
Atrioventricular block, second degree
I44.2
Primary diagnosis candidate
Atrioventricular block, complete
I44.3
Primary diagnosis candidate
Other and unspecified atrioventricular block
I44.4
Primary diagnosis candidate
Left anterior fascicular block
I44.5
Primary diagnosis candidate
Left posterior fascicular block
I44.6
Primary diagnosis candidate
Other and unspecified fascicular block
I44.7
Primary diagnosis candidate
Left bundle-branch block, 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.
