Obstructed labor due to pelvic inlet contraction

This code signifies a type of obstructed labor where the baby cannot pass through the birth canal due to a narrowing or inadequate size of the maternal pelvic inlet. This anatomical restriction prevents the normal progression of labor, often necessitating intervention.

Apply this code when documentation clearly indicates labor dystocia specifically attributed to a contracted or abnormally shaped pelvic inlet. This diagnosis is typically made after a trial of labor fails to progress or based on pelvimetry findings.

• Ensure documentation specifies "pelvic inlet contraction" as the cause of obstruction, not a general "cephalopelvic disproportion" without further detail.
• Sequence this code as the principal diagnosis when it is the primary reason for the encounter, followed by codes for the outcome of delivery.
• Distinguish from other forms of obstructed labor (e.g., O65.1 for outlet contraction or O65.4 for disproportion of mixed maternal and fetal origin).