G91.1Obstructive hydrocephalus
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 G90-G99
- Other disorders of the nervous system
- Official Vietnamese name
- Bệnh não úng thủy thể tắc nghẽn
Related G91 codes
G91
Hydrocephalus
G91.0
Primary diagnosis candidate
Communicating hydrocephalus
G91.2
Primary diagnosis candidate
Normal-pressure hydrocephalus
G91.3
Primary diagnosis candidate
Post-traumatic hydrocephalus, unspecified
G91.8
Primary diagnosis candidate
Other hydrocephalus
G91.9
Primary diagnosis candidate
Hydrocephalus, 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.
