G23.9Degenerative disease of basal ganglia, 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 G20-G26
- Extrapyramidal and movement disorders
- Official Vietnamese name
- Bệnh thoái hóa hạch nền, không xác định
- Additional WHO coding guidance
- (I95.1)
Related G23 codes
G23
Other degenerative diseases of basal ganglia
G23.0
Primary diagnosis candidate
Hallervorden-Spatz disease
G23.1
Primary diagnosis candidate
Progressive supranuclear ophthalmoplegia [Steele-Richardson- Olszewski]
G23.2
Primary diagnosis candidate
Multiple system atrophy, parkinsonian type [MSA-P]
G23.3
Primary diagnosis candidate
Multiple system atrophy, cerebellar type [MSA-C]
G23.8
Primary diagnosis candidate
Other specified degenerative diseases of basal ganglia
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.
