Table 2.

NPIC Obstetric Quality Measures

Cesarean section rateHospital's specific cesarean section rate is calculated by taking the number of cesarean section deliveries divided by the total number of deliveries.
Primary cesarean section rate (As defined by the CDC)CDC definition which is calculated as the number of women with a primary cesarean section (a cesarean section without a previous uterine scar code, ICD-9-CM Code 654.21) divided by the number of deliveries without a previous uterine scar.
Vaginal birth after cesarean section (VBAC) rateThe rate is calculated by identifying the number of vaginally delivered cases with a previous uterine scar code divided by the total number of cases with a previous uterine scar. Including all cases with a previous uterine scar in the denominator means that those not given a trial of labor are also included. Identification of those cases without a trial of labor is difficult using ICD-9-CM codes, but an algorithm is under development.
Third and fourth degree perineal laceration rate, forceps or vacuum extractionThe rate is calculated by identifying all delivered cases with an ICD-9-CM procedure code of 72. (Forceps, vacuum, and breech delivery) in the denominator and all of those cases with the additional ICD-9-CM diagnosis code of 664.2 or 664.3 (3rd or 4th degree laceration) in the numerator.
Third and fourth degree perineal laceration rate, without forceps or vacuum extractionThe rate of third and fourth degree lacerations in cases not having a forceps or vacuum extraction.
Anesthesia complication rateAnesthesia complications are defined as those cases with an ICD-9-CM diagnosis code of either 668.0–668.2: pulmonary, cardiac, or central nervous system anesthesia complications.
Obstetric readmission rateThe readmission rate of women who delivered, were discharged within 2 days, and readmitted within 28 days postdischarge. This rate excludes women readmitted to another facility.
Wound infection rateWound infections are defined as ICD-9-CM codes 674.1, 674.2, and 674.3—disruption of cesarean wound, disruption of perineal wound, or other complication of obstetric surgical wounds.