VITiếng Việt
ICD-10 Vietnam

R49.0Dysphonia

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 XVIII
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Group R47-R49
Symptoms and signs involving speech and voice
Official Vietnamese name
Rối loạn phát âm
Additional WHO coding guidance
Hoarseness

Related R49 codes

R49 Voice disturbances R49.1 Primary diagnosis candidate Aphonia R49.2 Primary diagnosis candidate Hypernasality and hyponasality R49.8 Primary diagnosis candidate Other and unspecified voice disturbances

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.