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 | ✓ |
| O66.0 | Obstructed labor due to shoulder dystocia | ✓ |
| O66.1 | Obstructed labor due to locked twins | ✓ |
| O66.1 | Obstructed labor due to locked twins | ✓ |
| O66.2 | Obstructed labor due to unusually large fetus | ✓ |
| O66.2 | Obstructed labor due to unusually large fetus | ✓ |
| O66.3 | Obstructed labor due to other abnormalities of fetus | ✓ |
| O66.3 | Obstructed labor due to other abnormalities of fetus | ✓ |
| O66.4 | Failed trial of labor | — |
| O66.4 | Failed trial of labor | — |
| O66.5 | Attempted application of vacuum extractor and forceps | ✓ |
| O66.5 | Attempted application of vacuum extractor and forceps | ✓ |
| O66.6 | Obstructed labor due to other multiple fetuses | ✓ |
| O66.6 | Obstructed labor due to other multiple fetuses | ✓ |
| O66.8 | Other specified obstructed labor | ✓ |
| O66.8 | Other specified obstructed labor | ✓ |
| O66.9 | Obstructed labor, unspecified | ✓ |
| O66.9 | Obstructed labor, unspecified | ✓ |
| O66.40 | Failed trial of labor, unspecified | ✓ |
| O66.40 | Failed trial of labor, unspecified | ✓ |
| O66.41 | Failed attempted vaginal birth after previous cesarean delivery | ✓ |
| O66.41 | Failed attempted vaginal birth after previous cesarean delivery | ✓ |
Frequently asked questions
What is ICD-10-CM code O66?
O66 is an ICD-10-CM category covering Other obstructed labor. It contains 22 more specific diagnosis codes, 20 of which are billable.
Is O66 a billable code?
No — O66 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example O66.0 — Obstructed labor due to shoulder dystocia). 20 of the 22 codes under O66 are billable.
What codes fall under O66?
O66 includes O66.0, O66.0, O66.1, O66.1, O66.2, plus 17 more. See the full list with descriptions and billable status above.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free