ICD-10-CM diagnosis code
O31.8X20 Other complications specific to multiple gestation, second trimester, not applicable or unspecified
- Billable
- Yes, a complete code (FY2026)
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Other codes in O31
140 complete codes in this category.
- O31.8X11Other complications specific to multiple gestation, first trimester, fetus 1
- O31.8X12Other complications specific to multiple gestation, first trimester, fetus 2
- O31.8X13Other complications specific to multiple gestation, first trimester, fetus 3
- O31.8X14Other complications specific to multiple gestation, first trimester, fetus 4
- O31.8X15Other complications specific to multiple gestation, first trimester, fetus 5
- O31.8X19Other complications specific to multiple gestation, first trimester, other fetus
- O31.8X20Other complications specific to multiple gestation, second trimester, not applicable or unspecified
- O31.8X21Other complications specific to multiple gestation, second trimester, fetus 1
- O31.8X22Other complications specific to multiple gestation, second trimester, fetus 2
- O31.8X23Other complications specific to multiple gestation, second trimester, fetus 3
- O31.8X24Other complications specific to multiple gestation, second trimester, fetus 4
- O31.8X25Other complications specific to multiple gestation, second trimester, fetus 5
Documentation tips
- Make sure the note supports every element of the title, “Other complications specific to multiple gestation, second trimester, not applicable or unspecified”: 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 O31.
The international WHO ICD-10 also has O31, 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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