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Page last reviewed: October, 2014

Page last updated: October, 2014

Content source: Centers for Disease Control and Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Division of STD Prevention

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        - Pelvic Inflammatory Disease (PID)

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Pelvic inflammatory disease (PID) is a clinical syndrome in women associated with the ascending spread of microorganisms from the vagina or the cervix to the upper genital tract. PID comprises a spectrum of inflammatory disorders including any combination of endometritis, salpingitis, tubo-ovarian abscess, or pelvic peritonitis. PID may be asymptomatic ("silent") or overt with mild to severe symptoms.


Approximately one million U.S. women are diagnosed with PID each year. The annual cost of treating PID and its sequelae is reported to exceed $4.2 billion. No national surveillance or reporting requirements exist, and national estimates are limited by insensitive clinical diagnosis criteria.

During 2001-2010, hospitalizations for acute PID overall have shown modest declines, although hospitalizations for acute PID increased by 44.3% (from 36.3 to 52.4 per 100,000) between 2009 and 2010. Hospitalizations for chronic PID have also shown modest declines, remaining relatively stable between 2007 and 2010

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The estimated number of initial visits to physicians offices for PID from NDTI declined during 2003 2012.


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