O25.11 Malnutrition in pregnancy, first trimester

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 648.91 Other current conditions classifiable elsewhere of mother, delivered, with or without mention of antepartum condition (approximate)
• 648.93 Other current conditions classifiable elsewhere of mother, antepartum condition or complication (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O25.11

Back-references to O25

• Type 2 Excludes: O99.2 Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium ("malnutrition (O25.-)")

Nearby codes

• O25 Malnutrition in pregnancy, childbirth and the puerperium
• O25.1 Malnutrition in pregnancy
• O25.10 Malnutrition in pregnancy, unspecified trimester
• O25.11 Malnutrition in pregnancy, first trimester (this code)
• O25.12 Malnutrition in pregnancy, second trimester
• O25.13 Malnutrition in pregnancy, third trimester
• O25.2 Malnutrition in childbirth
• O25.3 Malnutrition in the puerperium