Low weight gain in pregnancy, third trimester

This code signifies inadequate maternal weight gain during the third trimester of pregnancy. It indicates that the patient's weight increase is below the recommended guidelines for healthy fetal development and maternal well-being in the final stage of gestation.

Apply this code when documentation explicitly states "low weight gain" or "inadequate weight gain" specifically in the third trimester. This is typically identified during routine prenatal visits where the patient's weight is tracked against established gestational weight gain charts.

• Ensure the documentation clearly specifies "third trimester" for accurate code assignment.
• Do not use this code if the low weight gain is due to a specific underlying medical condition; instead, code the underlying condition.
• Consider sequencing this code after the primary obstetric encounter code (e.g., Z34.xx) if applicable.