661 Abnormality of forces of labor 
661.0 Primary uterine inertia 
661.00 Primary uterine inertia unspecified as to episode of care convert 661.00 to ICD-10-CM 661.01 Primary uterine inertia with delivery convert 661.01 to ICD-10-CM
661.03 Primary uterine inertia antepartum convert 661.03 to ICD-10-CM 661.1 Secondary uterine inertia 661.10 Secondary uterine inertia unspecified as to episode of care convert 661.10 to ICD-10-CM 661.11 Secondary uterine inertia with delivery convert 661.11 to ICD-10-CM 661.13 Secondary uterine inertia antepartum convert 661.13 to ICD-10-CM 661.2 Other and unspecified uterine inertia 661.20 Other and unspecified uterine inertia unspecified as to episode of care convert 661.20 to ICD-10-CM 661.21 Other and unspecified uterine inertia with delivery convert 661.21 to ICD-10-CM 661.23 Other and unspecified uterine inertia antepartum convert 661.23 to ICD-10-CM 661.3 Precipitate labor 661.30 Precipitate labor unspecified as to episode of care convert 661.30 to ICD-10-CM 661.31 Precipitate labor with delivery convert 661.31 to ICD-10-CM 661.33 Precipitate labor antepartum convert 661.33 to ICD-10-CM 661.4 Hypertonic incoordinate or prolonged uterine contractions 661.40 Hypertonic incoordinate or prolonged uterine contractions unspecified as to episode of care convert 661.40 to ICD-10-CM 661.41 Hypertonic incoordinate or prolonged uterine contractions with delivery convert 661.41 to ICD-10-CM 661.43 Hypertonic incoordinate or prolonged uterine contractions antepartum convert 661.43 to ICD-10-CM 661.9 Unspecified abnormality of labor 
661.90 Unspecified abnormality of labor unspecified as to episode of care convert 661.90 to ICD-10-CM 661.91 Unspecified abnormality of labor with delivery convert 661.91 to ICD-10-CM 661.93 Unspecified abnormality of labor antepartum convert 661.93 to ICD-10-CM