Chapter XI
Diseases of the digestive system
(K00-K93)

Diseases of peritoneum
(K65-K67)

K65 Peritonitis
Excludes: peritonitis:
· aseptic ( T81.6)
· benign paroxysmal ( E85.0)
· chemical ( T81.6)
· due to talc or other foreign substance ( T81.6)
· neonatal ( P78.0-P78.1)
· pelvic, female ( N73.3-N73.5)
· periodic familial ( E85.0)
· puerperal ( O85)
· with or following:
  · abortion or ectopic or molar pregnancy ( O00-O07, O08.0)
  · appendicitis ( K35.-)
  · diverticular disease of intestine ( K57.-)
K65.0 Acute peritonitis
Abscess (of):
· abdominopelvic
· mesenteric
· omentum
· peritoneum
· retrocaecal
· retroperitoneal
· subdiaphragmatic
· subhepatic
· subphrenic
Peritonitis (acute):
· generalized
· pelvic, male
· subphrenic
· suppurative
Use additional code (B95-B97), if desired, to identify infectious agent.
#K65.00 Primary peritonitis
#K65.01 Secondary bacterial peritonitis
Acute peritonitis NOS
K65.8 Other peritonitis
Chronic proliferative peritonitis
Mesenteric:
· fat necrosis
· saponification
Peritonitis due to:
· bile
· urine
K65.9 Peritonitis, unspecified

K66 Other disorders of peritoneum
Excludes: ascites ( R18 )
K66.0 Peritoneal adhesions
Adhesions (of):
· abdominal (wall)
· diaphragm
· intestine
· male pelvis
· mesenteric
· omentum
· stomach
Adhesive bands
Excludes: adhesions [bands] (of):
· female pelvis ( N73.6 )
· with intestinal obstruction ( K56.5 )
K66.1 Haemoperitoneum
Excludes: traumatic haemoperitoneum ( S36.8 )
K66.8 Other specified disorders of peritoneum
K66.9 Disorder of peritoneum, unspecified

K67* Disorders of peritoneum in infectious diseases classified elsewhere
K67.0* Chlamydial peritonitis ( A74.8+ )
K67.1* Gonococcal peritonitis ( A54.8+ )
K67.2* Syphilitic peritonitis ( A52.7+ )
K67.3* Tuberculous peritonitis ( A18.3+ )
K67.8* Other disorders of peritoneum in infectious diseases classified elsewhere