| O65 | Obstructed labor due to maternal pelvic abnormality |
| O65.0 | Obstructed labor due to deformed pelvis |
| O65.1 | Obstructed labor due to generally contracted pelvis |
| O65.2 | Obstructed labor due to pelvic inlet contraction |
| O65.3 | Obstructed labor due to pelvic outlet and mid-cavity contraction |
| O65.4 | Obstructed labor due to fetopelvic disproportion, unspecified |
| O65.5 | Obstructed labor due to abnormality of maternal pelvic organs |
| O65.8 | Obstructed labor due to other maternal pelvic abnormalities |
| O65.9 | Obstructed labor due to maternal pelvic abnormality, unspecified |
| O66 | Other obstructed labor |
| 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 |
| O66.40 | Failed trial of labor, unspecified |
| O66.41 | Failed attempted vaginal birth after previous cesarean delivery |
| 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 |