O41.0Oligohydramnios
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
- Official Vietnamese name
- Thiểu ối
- Additional WHO coding guidance
- Oligohydramnios without mention of rupture of membranes
Related O41 codes
O41
Other disorders of amniotic fluid and membranes
O41.1
Primary diagnosis candidate
Infection of amniotic sac and membranes
O41.8
Primary diagnosis candidate
Other specified disorders of amniotic fluid and membranes
O41.9
Primary diagnosis candidate
Disorder of amniotic fluid and membranes, 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.
