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ulcer (K28.-)
- gastrojejunal ulcer (K28.-)
- jejunal ulcer (K28.-)
- peptic ulcer, site unspecified (K27.-)
- ulcer of intestine with perforation (K63.1)
- ulcer of anus or rectum (K62.6)
- ulcerative colitis (K51.-)
- K63.4 Enteroptosis
- K63.5 Polyp of colon
- Excludes1: adenomatous polyp of colon (D12.6)
- inflammatory polyp of colon (K51.4-)
- polyposis of colon (D12.6)
- Excludes1: adenomatous polyp of colon (D12.6)
- K63.8 Other specified diseases of intestine
- K63.81 Dieulafoy lesion of intestine
- Excludes2: Dieulafoy lesion of stomach and duodenum (K31.82)
- K63.89 Other specified diseases of intestine
- K63.81 Dieulafoy lesion of intestine
- K63.9 Disease of intestine, unspecified
Diseases of peritoneum and retroperitoneum (K65-K68)
K65 Peritonitis
- Use additional code (B95-B97), to identify infectious agent
- Excludes1: acute appendicitis with generalized peritonitis (K35.2)
- aseptic peritonitis (T81.6)
- benign paroxysmal peritonitis (E85.0)
- chemical peritonitis (T81.6)
- diverticulitis of both small and large intestine with peritonitis (K57.4-)
- diverticulitis of colon with peritonitis (K57.2-)
- diverticulitis of intestine, NOS, with peritonitis (K57.8-)
- diverticulitis of small intestine with peritonitis (K57.0-)
- 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.-)
- peritonitis with or following diverticular disease of intestine (K57.-)
- puerperal peritonitis (O85)
- retroperitoneal