Pretrm prem ROM, unsp time betw rupt and onset labr, 1st tri

This code signifies the premature rupture of the amniotic sac (water breaking) before the onset of labor, occurring specifically during the first trimester of pregnancy. The documentation does not specify the duration between the membrane rupture and the beginning of labor contractions.

Use this code when a pregnant patient in her first trimester presents with documented premature rupture of membranes, and the time interval between rupture and labor onset is not recorded or is unknown. This diagnosis is typically supported by a physician's note detailing the rupture event and the gestational age.

• Ensure documentation clearly states "first trimester" and "premature rupture of membranes."
• Do not use if the time interval between rupture and labor onset is specified; instead, select a more specific O42.0 or O42.1 code.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, followed by codes for any associated complications.