Newborn small for gestational age, less than 500 grams

This code signifies a newborn infant who is small for their gestational age, specifically weighing less than 500 grams at birth. This condition indicates significant intrauterine growth restriction, often associated with prematurity and various maternal or fetal complications.

Apply this code for liveborn infants diagnosed with intrauterine growth restriction (IUGR) and a birth weight under 500 grams. Documentation should clearly state the infant's birth weight and gestational age, confirming the "small for gestational age" status.

• Always sequence this code after the appropriate Z38.- code for liveborn infant.
• Ensure the medical record explicitly states the birth weight is less than 500 grams; do not infer from "extremely low birth weight" alone.
• Distinguish from other codes for small for gestational age where the birth weight is 500 grams or more.