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661 Abnormality of forces of labor
Requires fifth digit; valid digits are in [brackets] under each code. See beginning of section 660-669 for definitions.
661.0 Primary uterine inertia
Failure of cervical dilation
Hypotonic uterine dysfunction, primary
Prolonged latent phase of labor
661.1 Secondary uterine inertia
Arrested active phase of labor
Hypotonic uterine dysfunction, secondary
661.2 Other and unspecified uterine inertia
Atony of uterus without hemorrhage
Desultory labor
Irregular labor
Poor contractions
Slow slope active phase of labor
atony of uterus with hemorrhage (666.1)
postpartum atony of uterus without hemorrhage (669.8)
661.3 Precipitate labor
661.4 Hypertonic, incoordinate, or prolonged uterine contractions
Cervical spasm
Contraction ring (dystocia)
Dyscoordinate labor
Hourglass contraction of uterus
Hypertonic uterine dysfunction
Incoordinate uterine action
Retraction ring (Bandl's) (pathological)
Tetanic contractions
Uterine dystocia NOS
Uterine spasm
661.9 Unspecified abnormality of labor
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