Excessive weight gain in pregnancy, first trimester

This code signifies a maternal condition where a pregnant patient experiences weight gain exceeding recommended guidelines during the initial three months of gestation. This excessive weight gain can be an indicator of potential complications for both the mother and the fetus.

Apply this code when documentation clearly indicates that the patient's weight gain in the first trimester surpasses the expected or healthy range for their pre-pregnancy BMI. Supporting documentation should include the patient's pre-pregnancy weight, current weight, and gestational age, along with a physician's assessment of "excessive weight gain."

• Ensure the documentation explicitly states "first trimester" for the excessive weight gain.
• Do not confuse this with generalized obesity in pregnancy (O99.21-); this code specifically addresses excessive weight gain during the first trimester.
• Consider co-reporting with codes for any associated complications or underlying conditions contributing to the weight gain.