Table 1.

List of All Patient Refined–Diagnosis-Related Group (APR–DRG) codes included in a study of racial/ethnic disparities in intensive care unit admissions in a pregnant and postpartum population, Hawaii, 2012-2017 ^a

APR–DRG code	Code description
540	Cesarean delivery
541	Vaginal delivery with sterilization and/or dilation and curettage
542	Vaginal delivery with complication procedures except sterilization and/or dilation and curettage
544	Dilation and curettage, aspiration curettage, or hysterotomy for obstetric diagnoses
545	Ectopic pregnancy
546	Other OR procedure for obstetric diagnoses except delivery diagnoses
560	Vaginal delivery
561	Postpartum and postabortion diagnoses without procedure
563	Threatened abortion
564	Abortion without dilation and curettage, aspiration curettage, or hysterotomy
565	False labor
566	Other antepartum diagnoses

^aData source: 3M Health Information Systems. ³¹