O66
⚠ Non-billable (Header)Other obstructed labor
Pregnancy, childbirth and the puerperium (O00-O9A)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for O66
Child Codes (9)
O66.0Obstructed labor due to shoulder dystociaO66.1Obstructed labor due to locked twinsO66.2Obstructed labor due to unusually large fetusO66.3Obstructed labor due to other abnormalities of fetusO66.4Failed trial of laborO66.5Attempted application of vacuum extractor and forcepsO66.6Obstructed labor due to other multiple fetusesO66.8Other specified obstructed laborO66.9Obstructed labor, unspecified
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CodeO66
BillableNo — Header code
CategoryPregnancy, childbirth and the puerperium (O00-O9A)
Excludes10 rule(s)
Excludes20 note(s)
Child codes9
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)