H81.9Disorder of vestibular function, 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 VIII
- Diseases of the ear and mastoid process
- Group H80-H83
- Diseases of inner ear
- Official Vietnamese name
- Rối loạn chức năng tiền đình, không xác định
- Additional WHO coding guidance
- Vertiginous syndrome NOS
Related H81 codes
H81
Disorders of vestibular function
H81.0
Primary diagnosis candidate
Ménière disease
H81.1
Primary diagnosis candidate
Benign paroxysmal vertigo
H81.2
Primary diagnosis candidate
Vestibular neuronitis
H81.3
Primary diagnosis candidate
Other peripheral vertigo
H81.4
Primary diagnosis candidate
Vertigo of central origin
H81.8
Primary diagnosis candidate
Other disorders of vestibular function
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.
