Prolonged first stage (of labor)

This code signifies an abnormally extended duration of the first stage of labor, characterized by slow or absent cervical dilation despite adequate uterine contractions. It indicates a failure of labor to progress within expected timeframes, potentially leading to maternal and fetal complications.

Apply this code when documentation explicitly states "prolonged first stage of labor" or describes a labor arrest disorder during the first stage. This diagnosis is typically made when the active phase of labor exceeds 12-20 hours for nulliparous women or 6-14 hours for multiparous women, or if there is no cervical change for 2 hours or more in the active phase.

• Do not confuse with prolonged second stage of labor (O63.1) or other labor complications.
• Always sequence this code as a principal diagnosis when it is the reason for admission or the primary focus of care.
• Ensure the medical record clearly documents the duration of labor and the specific stage affected to support this diagnosis.