G43.9Migraine, unspecified
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 VI
- Diseases of the nervous system
- Group G40-G47
- Episodic and paroxysmal disorders
- Official Vietnamese name
- Bệnh đau nửa đầu [migraine], không xác định
Related G43 codes
G43
Migraine
G43.0
Primary diagnosis candidate
Migraine without aura [common migraine]
G43.1
Primary diagnosis candidate
Migraine with aura [classical migraine]
G43.2
Primary diagnosis candidate
Status migrainosus
G43.3
Primary diagnosis candidate
Complicated migraine
G43.8
Primary diagnosis candidate
Other migraine
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.
