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    OpenPayerBilling CodesMaternal care related to the fetus and amniotic cavity and possible delivery problemsICD-10-CM o42-premature-rupture-of-membranes
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    ICD-10-CM Code For Premature Rupture Of Membranes: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O42 includes diagnoses related to premature rupture of fetal membranes, including term and preterm rupture and site-specific membrane complications. These ICD-10-CM diagnosis codes are used to document the timing of membrane rupture relative to labor onset, gestational age considerations, and any associated complications such as infection or fetal compromise. Accurate coding within the ICD-10-CM O42 group supports proper claim adjudication and complete clinical documentation for maternal-fetal care.

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    ICD-10-CM O42: Premature Rupture Of Membranes Overview

    The ICD-10-CM O42 group represents premature rupture of membranes, conditions in which the fetal membranes rupture before the onset of labor. These diagnoses target the amniotic cavity and events related to membrane integrity during pregnancy, often impacting maternal and fetal risk. Accurate coding matters for correct clinical documentation and appropriate billing for maternity care services.

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    When to Use

    Use a code from this group when documentation indicates rupture of membranes occurred prior to the onset of labor or when membrane status is specifically noted and affects care. Codes are also appropriate when associated complications such as infection, gestational age distinctions, or obstetric interventions are documented.

    ICD-10-CM Codes

    18 rows

    ICD-10-CM CodeDescription
    O42.00Premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified weeks of gestation
    O42.011Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, first trimester
    O42.012Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, second trimester
    O42.013Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, third trimester
    O42.019Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified trimester
    O42.02Full-term premature rupture of membranes, onset of labor within 24 hours of rupture
    O42.10Premature rupture of membranes, onset of labor more than 24 hours following rupture, unspecified weeks of gestation
    O42.111Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, first trimester
    O42.112Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, second trimester
    O42.113Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, third trimester
    O42.119Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, unspecified trimester
    O42.12Full-term premature rupture of membranes, onset of labor more than 24 hours following rupture
    O42.90Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified weeks of gestation
    O42.911Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, first trimester
    O42.912Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, second trimester
    O42.913Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, third trimester
    O42.919Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified trimester
    O42.92Full-term premature rupture of membranes, unspecified as to length of time between rupture and onset of labor

    DRG Codes

    6 rows

    DRG CodeDescription
    817Other Antepartum Diagnoses with O.R. Procedures with MCC
    818Other Antepartum Diagnoses with O.R. Procedures with CC
    819Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
    831Other Antepartum Diagnoses without O.R. Procedures with MCC
    832Other Antepartum Diagnoses without O.R. Procedures with CC
    833Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

    Typical Clinical Scenarios

    • A 29-year-old primigravida at 33 weeks gestation arrives to the emergency department reporting a gush of fluid and continuous leakage from the vagina earlier that morning. On sterile speculum exam, pooling of clear amniotic fluid is confirmed and fetal monitoring is reassuring; because membrane rupture occurred before 37 weeks and labor has not yet started, a code indicating preterm premature rupture of membranes with unspecified onset is assigned. Typical codes: O42.02, O42.12
    • A 36-year-old multiparous woman at 39 weeks gestation presents to triage with sudden vaginal fluid loss and contractions; examination documents rupture of membranes and active labor. This term patient in spontaneous labor with confirmed rupture at time of presentation is coded to reflect term premature rupture with labor onset and timing specificity. Typical codes: O42.00, O42.10
    • A 27-year-old pregnant patient at 35 weeks is admitted with fever, uterine tenderness, and foul-smelling amniotic fluid after several hours of membrane rupture; she is diagnosed with chorioamnionitis as a complication of prolonged rupture. Because this is rupture of membranes complicated by infection and prolonged interval, a code indicating preterm rupture with associated infectious complication or prolonged duration is assigned. Typical codes: O42.011, O42.019

    Related Codes

    O30-MULTIPLE-GESTATION-PREGNANCY

    ICD-10-CM Code For Multiple Gestation: Group Overview

    O31-COMPLICATIONS-SPECIFIC-TO-MULTIPLE-GESTATION

    ICD-10-CM Code For Complications Specific To Multiple Gestation: Group Overview

    O32-MALPRESENTATION-OF-FETUS

    ICD-10-CM Code For Maternal Care For Malpresentation Of Fetus: Group Overview

    O33-MATERNAL-CARE-FOR-DISPROPORTION

    ICD-10-CM Code For Maternal Care For Disproportion: Group Overview

    O34-ABNORMALITY-OF-PELVIC-ORGANS

    ICD-10-CM Code For Maternal Care For Abnormality Of Pelvic Organs: Group Overview

    O35-MATERNAL-CARE-FOR-FETAL-ABNORMALITY

    ICD-10-CM Code For Maternal Care For Known Or Suspected Fetal Abnormality And Damage: Group Overview

    O36-MATERNAL-CARE-OTHER-FETAL-PROBLEMS

    ICD-10-CM Code For Maternal Care For Other Fetal Problems: Group Overview

    O40-POLYHYDRAMNIOS

    ICD-10-CM Code For Polyhydramnios: Group Overview

    O41-OTHER-DISORDERS-OF-AMNIOTIC-FLUID

    ICD-10-CM Code For Other Disorders Of Amniotic Fluid And Membranes: Group Overview

    O43-PLACENTAL-DISORDERS

    ICD-10-CM Code For Placental Disorders: Group Overview

    Showing 1–10 of 15

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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