Low weight gain in pregnancy, unspecified trimester

This code signifies inadequate maternal weight gain during pregnancy when the specific trimester is not documented. It indicates a concern for potential fetal growth restriction or other pregnancy complications due to insufficient nutritional intake or absorption.

Use this code when the obstetrician notes "low weight gain" or "inadequate weight gain" in the patient's record, but the documentation does not specify if this occurred in the first, second, or third trimester. This code is appropriate when the provider is monitoring for potential nutritional deficiencies impacting the pregnancy.

• Avoid using this code if the specific trimester of low weight gain is documented; instead, use the more specific O26.11-, O26.12-, or O26.13- codes.
• Ensure the medical record clearly indicates that the low weight gain is a clinical concern and not just a normal variation.
• Consider co-reporting with codes for underlying conditions contributing to low weight gain, such as hyperemesis gravidarum (O21.-) or nutritional deficiencies (E40-E64).