Other maternal disorders predominantly related to pregnancy (O20-O29) ICD-10-CM
The O20–O29 section covers other maternal disorders predominantly related to pregnancy with 343 ICD-10-CM diagnosis codes, of which 260 are billable in fiscal year 2026. The section is organized into the 9 code ranges listed below.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Code Ranges in This Section 9 ranges · 343 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the O20–O29 Code Range
ICD-10 codes O20-O29 cover a variety of maternal disorders primarily related to pregnancy, including bleeding complications, excessive vomiting, venous issues, infections, diabetes, malnutrition, and anesthesia-related complications during pregnancy, childbirth, and the postpartum period.
This range includes codes like O20 for early pregnancy hemorrhage and O21 for excessive vomiting, also known as hyperemesis gravidarum. Venous complications and hemorrhoids during pregnancy are classified under O22, with detailed codes for varicose veins, thrombophlebitis, and cerebral venous thrombosis. Infections of the genitourinary tract in pregnancy, including kidney, bladder, and genital tract infections, fall under O23. Diabetes mellitus in pregnancy, with distinctions for type 1, type 2, gestational, and other forms, is captured by codes in O24. Malnutrition related to pregnancy is found under O25. The O26 codes address maternal care issues such as excessive or low weight gain, fatigue, renal disease, and other pregnancy-related complications like cervical shortening and pruritic urticarial papules (PUPPP). Abnormal antenatal screening results are coded in O28. Finally, anesthesia complications during pregnancy, including pulmonary, cardiac, CNS issues, and reactions to local anesthesia, are detailed in the O29 series. These codes help capture specific maternal conditions that can impact pregnancy management and outcomes.
Questions About This Page
How many codes are in the O20-O29 range?
The O20-O29 range contains 343 ICD-10-CM diagnosis codes in FY 2026. 260 of them are billable, and the rest are category headers that organize the section.
What conditions does O20-O29 cover?
The range covers other maternal disorders predominantly related to pregnancy. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
