NB aff by abnlt in fetal heart rate or rhym, unsp time onset

This code signifies a newborn diagnosed with an abnormal heart rate or rhythm that originated during fetal development. This condition indicates a deviation from normal cardiac activity observed prenatally, without specifying the exact timing of its onset.

Use this code when documentation indicates a newborn was affected by an intrauterine fetal heart rate or rhythm abnormality, such as fetal bradycardia, tachycardia, or arrhythmia, and the specific cause or precise timing of onset is not documented. This code is appropriate when the abnormality was identified prenatally and is impacting the newborn.

• Do not use this code if a more specific code for the type of fetal heart rate abnormality (e.g., P03.811 for bradycardia) or the specific time of onset is documented.
• Always review the maternal record for details regarding fetal monitoring and any documented cardiac abnormalities during pregnancy.
• Consider sequencing this code after the primary reason for the newborn's admission or encounter, if applicable.