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.
661.2 Other and unspecified uterine inertia
[0,1,3]
Atony of uterus without hemorrhage
Desultory labor
Irregular labor
Poor contractions
Slow slope active phase of labor
Excludes:
atony of uterus with hemorrhage (666.1)
postpartum atony of uterus without hemorrhage (669.8)

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