ICD-10-CM category
O66 Other obstructed labour
O66 is a category, not a billable code. Report one of the 10 complete codes below.
Codes in O66
- 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
Outside the US? O66 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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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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