ICD-9-CM

The following fifth-digit subclassification is for use with categories 660-669 to denote the current episode of care:

0 unspecified as to episode of care or not applicable

1 delivered, with or without mention of antepartum condition

2 delivered, with mention of postpartum complication

3 antepartum condition or complication

4 postpartum condition or complication

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 [0,1,3] Failure of cervical dilation Hypotonic uterine dysfunction, primary Prolonged latent phase of labor
661.1: Secondary uterine inertia [0,1,3] Arrested active phase of labor Hypotonic uterine dysfunction, secondary
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)
661.3: Precipitate labor [0,1,3]
661.4: Hypertonic, incoordinate, or prolonged uterine contractions [0,1,3] 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 [0,1,3]

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.

[0,1,3]

Failure of cervical dilation

Hypotonic uterine dysfunction, primary

Prolonged latent phase of labor

[0,1,3]

Arrested active phase of labor

Hypotonic uterine dysfunction, secondary