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

Billable ICD-10-CM code, FY2026.

Applicable to

• Premature rupture of membranes at or after 37 completed weeks of gestation, onset of labor more than 24 hours following rupture

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 658.21 Delayed delivery after spontaneous or unspecified rupture of membranes, delivered, with or without mention of antepartum condition (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Diagnosis Index entries for O42.12

• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › premature rupture of membranes › with onset of labor › after 24 hours › at or after 37 weeks gestation, onset of labor more than 24 hours following rupture

Nearby codes

• O42.11 Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture
• O42.111 Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, first trimester
• O42.112 Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, second trimester
• O42.113 Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, third trimester
• O42.119 Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, unspecified trimester
• O42.12 Full-term premature rupture of membranes, onset of labor more than 24 hours following rupture (this code)
• O42.9 Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor
• O42.90 Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified weeks of gestation
• O42.91 Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor
• O42.911 Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, first trimester
• O42.912 Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, second trimester