Diseases of peritoneum and retroperitoneum (K65-K68)
K65Peritonitis
Use Additional Code: code (B95-B97), to identify infectious agent, if known
Code Also: if applicable diverticular disease of intestine (K57.-)
Excludes 1: acute appendicitis with generalized peritonitis (K35.2-)
› aseptic peritonitis (T81.6)
› benign paroxysmal peritonitis (E85.0)
› chemical peritonitis (T81.6)
› gonococcal peritonitis (A54.85)
› neonatal peritonitis (P78.0-P78.1)
› pelvic peritonitis, female (N73.3-N73.5)
› periodic familial peritonitis (E85.0)
› peritonitis due to talc or other foreign substance (T81.6)
› peritonitis in chlamydia (A74.81)
› peritonitis in diphtheria (A36.89)
› peritonitis in syphilis (late) (A52.74)
› peritonitis in tuberculosis (A18.31)
› peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)
› peritonitis with or following appendicitis (K35.-)
› puerperal peritonitis (O85)
› retroperitoneal infections (K68.-)
K65.0Generalized (acute) peritonitis
› Pelvic peritonitis (acute), male
› Subphrenic peritonitis (acute)
› Suppurative peritonitis (acute)
K65.1Peritoneal abscess
› Abdominopelvic abscess
› Abscess (of) omentum
› Abscess (of) peritoneum
› Mesenteric abscess
› Retrocecal abscess
› Subdiaphragmatic abscess
› Subhepatic abscess
› Subphrenic abscess
K65.2Spontaneous bacterial peritonitis
Excludes 1: bacterial peritonitis NOS (K65.9)
K65.3Choleperitonitis
› Peritonitis due to bile
K65.4Sclerosing mesenteritis
› Fat necrosis of peritoneum
› (Idiopathic) sclerosing mesenteric fibrosis
› Mesenteric lipodystrophy
› Mesenteric panniculitis
› Retractile mesenteritis
K65.8Other peritonitis
› Chronic proliferative peritonitis
› Peritonitis due to urine
K65.9Peritonitis, unspecified
› Bacterial peritonitis NOS
K66Other disorders of peritoneum
Excludes 2: ascites (R18.-)
› peritoneal effusion (chronic) (R18.8)
K66.0Peritoneal adhesions (postprocedural) (postinfection)
› Adhesions (of) abdominal (wall)
› Adhesions (of) diaphragm
› Adhesions (of) intestine
› Adhesions (of) male pelvis
› Adhesions (of) omentum
› Adhesions (of) stomach
› Adhesive bands
› Mesenteric adhesions
Excludes 1: female pelvic adhesions [bands] (N73.6)
› peritoneal adhesions with intestinal obstruction (K56.5-)
K66.1Hemoperitoneum
› Peritoneal hematoma
› Peritoneal hemorrhage
Excludes 1: traumatic hemoperitoneum (S36.8-)
Excludes 2: retroperitoneal hematoma (K68.3)
› retroperitoneal hemorrhage (K68.3)
K66.8Other specified disorders of peritoneum
K66.9Disorder of peritoneum, unspecified
K67Disorders of peritoneum in infectious diseases classified elsewhere
Code First: underlying disease, such as:
› congenital syphilis (A50.0)
› helminthiasis (B65.0 -B83.9)
Excludes 1: peritonitis in chlamydia (A74.81)
› peritonitis in diphtheria (A36.89)
› peritonitis in gonococcal (A54.85)
› peritonitis in syphilis (late) (A52.74)
› peritonitis in tuberculosis (A18.31)
K68Disorders of retroperitoneum
K68.1Retroperitoneal abscess
K68.11Postprocedural retroperitoneal abscess
Excludes 2: infection following procedure (T81.4-)
K68.12Psoas muscle abscess
K68.19Other retroperitoneal abscess
K68.2Retroperitoneal fibrosis
Code Also: , if applicable, associated obstruction of ureter (N13.5)
K68.3Retroperitoneal hematoma
› Retroperitoneal hemorrhage
K68.9Other disorders of retroperitoneum