I22Subsequent myocardial infarction
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use I22 directly
Use the most specific code supported by the record.
- Chapter IX
- Diseases of the circulatory system
- Group I20-I25
- Ischaemic heart diseases
- Official Vietnamese name
- Nhồi máu cơ tim tái phát
- Additional WHO coding guidance
- Note: For morbidity coding, this category should be assigned for infarction of any myocardial site, occurring within 4 weeks (28 days) from onset of a previous infarction Incl.: myocardial infarction: extension recurrent reinfarction Excl.: specified as chronic or with a stated duration of more than 4 weeks (more than 28 days) from onset (I25.8)
Related I22 codes
I22.0
Primary diagnosis candidate
Subsequent myocardial infarction of anterior wall
I22.1
Primary diagnosis candidate
Subsequent myocardial infarction of inferior wall
I22.8
Primary diagnosis candidate
Subsequent myocardial infarction of other sites
I22.9
Primary diagnosis candidate
Subsequent myocardial infarction of unspecified site
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.
