ICD-10-CM diagnosis code
O26.90 Pregnancy related conditions, unspecified, unspecified trimester
- Billable
- Yes, a complete code (FY2026)
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Other codes in O26
72 complete codes in this category.
- O26.86Pruritic urticarial papules and plaques of pregnancy (PUPPP)
- O26.872Cervical shortening, second trimester
- O26.873Cervical shortening, third trimester
- O26.879Cervical shortening, unspecified trimester
- O26.891Other specified pregnancy related conditions, first trimester
- O26.892Other specified pregnancy related conditions, second trimester
- O26.893Other specified pregnancy related conditions, third trimester
- O26.899Other specified pregnancy related conditions, unspecified trimester
- O26.90Pregnancy related conditions, unspecified, unspecified trimester
- O26.91Pregnancy related conditions, unspecified, first trimester
- O26.92Pregnancy related conditions, unspecified, second trimester
- O26.93Pregnancy related conditions, unspecified, third trimester
Documentation tips
- Make sure the note supports every element of the title, “Pregnancy related conditions, unspecified, unspecified trimester”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to O26.
The international WHO ICD-10 also has O26, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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