Malnutrition in pregnancy, first trimester

This code identifies a state of inadequate nutritional intake or absorption occurring during the initial three months of gestation. It encompasses deficiencies in macronutrients (e.g., protein, calories) or micronutrients (e.g., vitamins, minerals) that negatively impact maternal health and fetal development.

Apply this code when documentation clearly indicates a diagnosis of malnutrition in a pregnant patient during her first trimester. Supporting documentation includes physician notes detailing nutritional deficiencies, weight loss, inadequate dietary intake, or laboratory findings consistent with malnutrition.

• Always confirm the trimester of pregnancy; this code is specific to the first trimester.
• Distinguish from hyperemesis gravidarum (O21.0-O21.9) which may lead to malnutrition but is coded separately.
• Code any specific nutritional deficiencies (e.g., E55.9 for Vitamin D deficiency) as secondary diagnoses.