2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Other Diseases Of Intestines And Peritoneum 560-569 > 2006 ICD-9-CM Diagnosis 566 Abscess of anal and rectal regions View the most recent version of ICD-9-CM 566 566 is a specific code that can be used to specify a diagnosis 566 contains 17 index entries Alternate Terminology Abscess: ischiorectal perianal perirectal Cellulitis: anal perirectal rectal Ischiorectal fistula  Index entries containing 566: Abscess (acute) (chronic) (infectional) (lymphangitic) (metastatic) (multiple) (pyogenic) (septic) (with lymphangitis) (see also Cellulitis) 682.9 anorectal 566 anus 566 intersphincteric (anus) 566 intestine, intestinal 569.5 rectal 566 ischiorectal 566 marginal (anus) 566 pararectal 566 perianal 566 periproctic 566 perirectal (staphylococcal) 566 postanal 566 rectum 566 retrorectal 566 Cellulitis (diffuse) (with lymphangitis) (see also Abscess) 682.9 anus 566 perirectal 566 rectum 566 Fistula (sinus) 686.9 ischiorectal (fossa) 566