Detection of Pelvic Inflammatory Disease: Development of an Automated Case-Finding Algorithm Using Administrative Data

Table 1

ICD-9 codes commonly utilized to identify possible acute pelvic inflammatory disease (PID) and code distribution among potential PID cases sampled from Group Health Cooperative.

ICD-9 Code and Description	Number of potential cases with code* (%)
098.10-Acute GC upper GU tract, site unspecified
098.16-Acute GC endometritis
098.17-Acute GC salpingitis	5 (1.3)
098.19-Acute GC upper GU tract, other site
098.86-Acute GC peritonitis
099.56-Acute CT peritonitis	0 (0.0)
614.0-Acute salpingo-oophoritis
614.5-Acute or unspecified pelvic peritonitis	8 (2.0)
614.8-Other specified inflammatory disease, female pelvic organs
614.2-Salpingitis/oophoritis, not acute or chronic	22 (5.6)
614.3-Acute parametritis/PID	53 (13.5)
614.9-Unspecified inflammatory disease, female pelvic organs	252 (64.1)
615.0-Inflammatory disease of uterus, except cervix	15 (3.8)
615.9-Unspecified inflammatory disease of uterus	80 (20.4)

GC: gonorrhea, GU: genitourinary, CT: chlamydia.
*A single potential PID case may include multiple ICD-9 codes. 393 total potential PID cases were identified, and a total of 435 ICD-9 codes were used.