1. O66 Other obstructed labor

    1. O66.0 Obstructed labor due to shoulder dystocia

      Inclusion term(s):

      • Impacted shoulders
    2. O66.1 Obstructed labor due to locked twins

    3. O66.2 Obstructed labor due to unusually large fetus

    4. O66.3 Obstructed labor due to other abnormalities of fetus

      Inclusion term(s):

      • Dystocia due to fetal ascites
      • Dystocia due to fetal hydrops
      • Dystocia due to fetal meningomyelocele
      • Dystocia due to fetal sacral teratoma
      • Dystocia due to fetal tumor
      • Dystocia due to hydrocephalic fetus
    5. O66.4 Failed trial of labor

      1. O66.40 Failed trial of labor, unspecified

      2. O66.41 Failed attempted vaginal birth after previous cesarean delivery

    6. O66.5 Attempted application of vacuum extractor and forceps

      Inclusion term(s):

      • Attempted application of vacuum or forceps, with subsequent delivery by forceps or cesarean delivery
    7. O66.6 Obstructed labor due to other multiple fetuses

    8. O66.8 Other specified obstructed labor

    9. O66.9 Obstructed labor, unspecified

      Inclusion term(s):

      • Dystocia NOS
      • Fetal dystocia NOS
      • Maternal dystocia NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.