Maternal care for excess fetal growth, first tri, fetus 1

This code signifies a pregnancy where the fetus is growing larger than expected for its gestational age, specifically identified during the first trimester. It indicates that the mother is receiving medical attention or monitoring due to concerns about potential complications arising from the fetus's accelerated growth.

Apply this code when documentation confirms maternal care for a singleton pregnancy in the first trimester (up to 13 weeks and 6 days) due to excessive fetal growth. This typically involves findings such as an estimated fetal weight or biometric measurements (e.g., crown-rump length, biparietal diameter) that exceed the 90th percentile for gestational age, prompting increased surveillance or management.

• Ensure the documentation explicitly states "first trimester" and identifies "fetus 1" if multiple fetuses are present.
• Distinguish from codes for large for gestational age (LGA) at birth; this code is for maternal care during pregnancy for excessive growth.
• Always sequence this code as a secondary diagnosis, with the primary diagnosis reflecting the reason for the encounter (e.g., routine prenatal visit).