2026 ICD-10-CM Diagnosis Code O42Premature rupture of membranes

ICD-10-CM Codes›O00-O9A›O30-O48›O42

ICD-10-CM O42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O42 is a non-billable ICD-10-CM category code for premature rupture of membranes, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O42.00, O42.011, O42.012, and O42.013.

Code Identity

ICD-10-CM Code
O42
Billable Status
No — Non-Billable Category
Code Describes
Premature rupture of membranes
Chapter
O30-O48
Maternal care related to the fetus and amniotic cavity and possible delivery problems

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
CategoryO42Premature rupture of membranes
This CodeO42Premature rupture of membranes

Specific Coding for Premature rupture of membranesOverview

Non-specific codes like O42 require more characters. Use one of these billable codes instead:

  • O42.0 for Premature rupture of membranes, onset of labor within 24 hours of rupture

  • Use O42.00 for Premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified weeks of gestation

  • O42.01 for Preterm premature rupture of membranes, onset of labor within 24 hours of rupture

  • Use O42.02 for Full-term premature rupture of membranes, onset of labor within 24 hours of rupture

  • O42.1 for Premature rupture of membranes, onset of labor more than 24 hours following rupture

  • Use O42.10 for Premature rupture of membranes, onset of labor more than 24 hours following rupture, unspecified weeks of gestation

  • O42.11 for Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture

  • Use O42.12 for Full-term premature rupture of membranes, onset of labor more than 24 hours following rupture

  • O42.9 for Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor

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

  • O42.91 for Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor

  • Use O42.92 for Full-term premature rupture of membranes, unspecified as to length of time between rupture and onset of labor

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Pregnancy(single) (uterine)
      • complicated by (care of) (management affected by)
        • rupture
          • amnion (premature)
    • Pregnancy(single) (uterine)
      • complicated by (care of) (management affected by)
        • rupture
          • membranes (premature)

Patient EducationClinical

Childbirth Problems

Childbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O42Overview

Is O42 (Premature rupture of membranes) a billable code?

No. This is a category header that groups the codes for premature rupture of membranes, and headers cannot be submitted on claims. Claims for premature rupture of membranes need a more specific code from this category, such as O42.00, O42.011, and O42.012.