ICD-10-CM diagnosis code
O66.3 Obstructed labor due to other abnormalities of fetus
- Billable
- Yes, a complete code (FY2026)
- Category
- O66 Other obstructed labour
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Other codes in O66
10 complete codes in this category.
- O66.0Obstructed labor due to shoulder dystocia
- O66.1Obstructed labor due to locked twins
- O66.2Obstructed labor due to unusually large fetus
- O66.3Obstructed labor due to other abnormalities of fetus
- O66.40Failed trial of labor, unspecified
- O66.41Failed attempted vaginal birth after previous cesarean delivery
- O66.5Attempted application of vacuum extractor and forceps
- O66.6Obstructed labor due to other multiple fetuses
- O66.8Other specified obstructed labor
- O66.9Obstructed labor, unspecified
Documentation tips
- Make sure the note supports every element of the title, “Obstructed labor due to other abnormalities of fetus”: 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 O66.
The international WHO ICD-10 also has O66.3, 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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