Metabolic acidemia in newborn first noted before onset labor

This code signifies an abnormal accumulation of acid in the blood of a newborn, specifically when this condition was identified prior to the initiation of labor. It indicates a metabolic imbalance present in the fetus before birth, leading to an acidic state.

Apply this code when documentation clearly indicates fetal metabolic acidemia diagnosed antenatally, before the onset of uterine contractions. Supporting documentation would include abnormal fetal blood gas analysis (e.g., umbilical artery pH < 7.00, base deficit > 12 mmol/L) or other biochemical markers identified during pregnancy.

• Distinguish from acidemia occurring during or after labor; this code is strictly for pre-labor onset.
• Ensure documentation specifies "metabolic" acidemia, not respiratory, as the underlying cause.
• Always sequence this code after the primary reason for the newborn's admission or encounter, if applicable.