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

Billable ICD-10-CM code, FY2026.

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 658.10 Premature rupture of membranes, unspecified as to episode of care or not applicable (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 O42.00

• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › premature rupture of membranes › with onset of labor › within 24 hours

Nearby codes

• O42 Premature rupture of membranes
• O42.0 Premature rupture of membranes, onset of labor within 24 hours of rupture
• O42.00 Premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified weeks of gestation (this code)
• O42.01 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture
• O42.011 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, first trimester
• O42.012 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, second trimester
• O42.013 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, third trimester
• O42.019 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified trimester