1. O64 Obstructed labor due to malposition and malpresentation of fetus

    One of the following 7th characters is to be assigned to each code under category O64. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O64 that has a 7th character of 1 through 9.

    • 0 - not applicable or unspecified
    • 1 - fetus 1
    • 2 - fetus 2
    • 3 - fetus 3
    • 4 - fetus 4
    • 5 - fetus 5
    • 9 - other fetus
    1. O64.0 Obstructed labor due to incomplete rotation of fetal head

      Inclusion term(s):

      • Deep transverse arrest
      • Obstructed labor due to persistent occipitoiliac (position)
      • Obstructed labor due to persistent occipitoposterior (position)
      • Obstructed labor due to persistent occipitosacral (position)
      • Obstructed labor due to persistent occipitotransverse (position)
    2. O64.1 Obstructed labor due to breech presentation

      Inclusion term(s):

      • Obstructed labor due to buttocks presentation
      • Obstructed labor due to complete breech presentation
      • Obstructed labor due to frank breech presentation
    3. O64.2 Obstructed labor due to face presentation

      Inclusion term(s):

      • Obstructed labor due to chin presentation
    4. O64.3 Obstructed labor due to brow presentation

    5. O64.4 Obstructed labor due to shoulder presentation

      Inclusion term(s):

      • Prolapsed arm
    6. O64.5 Obstructed labor due to compound presentation

    7. O64.8 Obstructed labor due to other malposition and malpresentation

      Inclusion term(s):

      • Obstructed labor due to footling presentation
      • Obstructed labor due to incomplete breech presentation
    8. O64.9 Obstructed labor due to malposition and malpresentation, unspecified

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.