G47.4Narcolepsy and cataplexy
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
- Chứng ngủ rũ và/hoặc chứng mất trương lực
Related G47 codes
G47
Sleep disorders
G47.0
Primary diagnosis candidate
Disorders of initiating and maintaining sleep [insomnias]
G47.1
Primary diagnosis candidate
Disorders of excessive somnolence [hypersomnias]
G47.2
Primary diagnosis candidate
Disorders of the sleep-wake schedule
G47.3
Primary diagnosis candidate
Sleep apnoea
G47.8
Primary diagnosis candidate
Other sleep disorders
G47.9
Primary diagnosis candidate
Sleep disorder, 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.
