O66: Other obstructed labor

Codes under O66 (Other obstructed labor). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
O66.0	Obstructed labor due to shoulder dystocia	✓
O66.1	Obstructed labor due to locked twins	✓
O66.2	Obstructed labor due to unusually large fetus	✓
O66.3	Obstructed labor due to other abnormalities of fetus	✓
O66.4	Failed trial of labor	—
O66.5	Attempted application of vacuum extractor and forceps	✓
O66.6	Obstructed labor due to other multiple fetuses	✓
O66.8	Other specified obstructed labor	✓
O66.9	Obstructed labor, unspecified	✓
O66.40	Failed trial of labor, unspecified	✓
O66.41	Failed attempted vaginal birth after previous cesarean delivery	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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