O42.012 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, second trimester

Billable ICD-10-CM code, FY2026.

Applies from O42.01 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture

Applicable to

• Premature rupture of membranes before 37 completed weeks of gestation

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 658.11 Premature rupture of membranes, delivered, with or without mention of antepartum condition (approximate)
• 658.13 Premature rupture of membranes, antepartum condition or complication (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.

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
• 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 (this code)
• 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
• O42.02 Full-term premature rupture of membranes, onset of labor within 24 hours of rupture
• O42.1 Premature rupture of membranes, onset of labor more than 24 hours following rupture
• O42.10 Premature rupture of membranes, onset of labor more than 24 hours following rupture, unspecified weeks of gestation