O42.1Premature rupture of membranes, onset of labour after 24 hours
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
- Vỡ ối sớm, xuất hiện chuyển dạ sau 24 giờ
- Additional WHO coding guidance
- Excl.: with labour delayed by therapy (O42.2)
Related O42 codes
O42
Premature rupture of membranes
O42.0
Primary diagnosis candidate
Premature rupture of membranes, onset of labour within 24 hours
O42.2
Primary diagnosis candidate
Premature rupture of membranes, labour delayed by therapy
O42.9
Primary diagnosis candidate
Premature rupture of 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.
