ICD-10-CM > O00-O9A > O20-O29 > O25 > O25.1 O25.1 Malnutrition in pregnancy Non-Billable/Non-Specific Codes O25.10Malnutrition in pregnancy, unspecified trimesterO25.11Malnutrition in pregnancy, first trimesterO25.12Malnutrition in pregnancy, second trimesterO25.13Malnutrition in pregnancy, third trimester