G44Other headache syndromes
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 G44 directly
Use the most specific code supported by the record.
- Chapter VI
- Diseases of the nervous system
- Group G40-G47
- Episodic and paroxysmal disorders
- Official Vietnamese name
- Hội chứng đau đầu khác
- Additional WHO coding guidance
- Excl.: atypical facial pain (G50.1) headache NOS (R51) trigeminal neuralgia (G50.0)
Related G44 codes
G44.0
Primary diagnosis candidate
Cluster headache syndrome
G44.1
Primary diagnosis candidate
Vascular headache, not elsewhere classified
G44.2
Primary diagnosis candidate
Tension-type headache
G44.3
Primary diagnosis candidate
Chronic post- traumatic headache
G44.4
Primary diagnosis candidate
Drug-induced headache, not elsewhere classified
G44.8
Primary diagnosis candidate
Other specified headache syndromes
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.
