2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Premature rupture of membranes
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O42: its own notes plus those printed at Chapter 15. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

General instructions on how these codes are used.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical InformationClinical

  • Premature Rupture of Membrane

    spontaneous rupture of fetal membranes that occurs before the onset of labor. if rupture occurs before 37 weeks of gestation then the correct diagnosis is preterm premature rupture of membranes.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O42Overview

What is the ICD-10 code for premature rupture of membranes?

O42 is the ICD-10-CM category for premature rupture of membranes, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.