O42.90 — Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified weeks of gestation

O42.90

ICD-10 Chapter 15: Pregnancy, Childbirth & Puerperium — illustrative image — Chapter 15: Pregnancy, childbirth and the puerperium (O00–O9A) — illustrative image

What this code means

Preterm premature rupture of membranes: the waters break before 37 weeks, with the onset of labour not specified.

Also called: pprom, preterm premature rupture of membranes.

When this code is used

Used for preterm premature rupture of membranes, unspecified onset of labour.

Where it sits in ICD-10-CM

Code O42.90 belongs to Chapter 15: Pregnancy, childbirth and the puerperium, which covers codes O00–O9A in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Learn more about this condition

Condition guide: Pregnancy

Frequently asked questions

What is ICD-10-CM code O42.90?

O42.90 is the ICD-10-CM diagnosis code for “Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified weeks of gestation”. Preterm premature rupture of membranes: the waters break before 37 weeks, with the onset of labour not specified.

When is code O42.90 used?

Used for preterm premature rupture of membranes, unspecified onset of labour. It belongs to Chapter 15 of ICD-10-CM (Pregnancy, childbirth and the puerperium).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.