O42Header code — not billable
Premature rupture of membranes
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O42
- Effective date
- October 1, 2026
Related codes in category O42
O42.0Premature ROM, onset of labor within 24 hours of ruptureO42.00Prem ROM, onset labor w/n 24 hr of rupt, unsp weeks of gestYesO42.01Preterm prem ROM, onset labor within 24 hours of ruptureO42.011Pretrm prem ROM, onset labor w/n 24 hours of rupt, first triYesO42.012Pretrm prem ROM, onset labor w/n 24 hours of rupt, 2nd triYesO42.013Pretrm prem ROM, onset labor w/n 24 hours of rupt, third triYesO42.019Pretrm prem ROM, onset labor w/n 24 hours of rupt, unsp triYesO42.02Full-term prem ROM, onset labor within 24 hours of ruptureYesO42.1Premature ROM, onset labor more than 24 hours fol ruptureO42.10Prem ROM, onset labor > 24 hr fol rupt, unsp weeks of gestYesO42.11Preterm premature ROM, onset labor > 24 hours fol ruptureO42.111Pretrm prem ROM, onset labor > 24 hours fol rupt, first triYes
Frequently asked questions
What is ICD-10 code O42?
O42 is an ICD-10-CM diagnosis code for Premature rupture of membranes.
Is O42 a billable code?
No. O42 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is O42 in?
O42 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O42 become effective?
O42 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O42?
O42 belongs to category O42, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.