VITiếng Việt
ICD-10 Vietnam

O21.1Hyperemesis gravidarum with metabolic disturbance

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 XV
Pregnancy, childbirth and the puerperium
Group O20-O29
Other maternal disorders predominantly related to pregnancy
Official Vietnamese name
Nôn nghén kèm rối loạn chuyển hóa
Additional WHO coding guidance
Hyperemesis gravidarum, starting before the end of the 22nd week of gestation, with metabolic disturbance such as: carbohydrate depletion dehydration electrolyte imbalance

Related O21 codes

O21 Excessive vomiting in pregnancy O21.0 Primary diagnosis candidate Mild hyperemesis gravidarum O21.2 Primary diagnosis candidate Late vomiting of pregnancy O21.8 Primary diagnosis candidate Other vomiting complicating pregnancy O21.9 Primary diagnosis candidate Vomiting of pregnancy, 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.