NB aff by abnlt in fetal heart rate or rhym bef onset labor

This code signifies a newborn diagnosed with an abnormal heart rate or rhythm that was identified before the mother entered labor. This includes conditions like fetal bradycardia, tachycardia, or arrhythmias detected during antenatal monitoring. The abnormality is present at birth and is a direct consequence of the intrauterine event.

Apply this code when documentation clearly states a newborn was affected by an abnormal fetal heart rate or rhythm identified prior to the onset of labor. This is typically supported by antenatal fetal monitoring strips, ultrasound reports, or obstetrician notes detailing the specific cardiac anomaly. Use this code as a primary diagnosis for the newborn's condition.

• Ensure the documentation explicitly states the abnormality was identified before labor began.
• Do not confuse with abnormalities arising during labor or delivery, or those identified after birth without prior intrauterine evidence.
• Sequence this code first when it is the primary reason for the newborn's admission or care.