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

Rules Conventions GCS DChS.XI.1

Noninfective enteritis and colitis
(K50-K52)

Incl.:
noninfective inflammatory bowel disease
Excl.:
irritable bowel syndrome ( K58.-)
megacolon ( K59.3)

K50 Crohn disease [regional enteritis]

Incl.:
granulomatous enteritis
Excl.:
ulcerative colitis ( K51.-)
K50.0 Crohn disease of small intestine
Incl.:
Crohn disease [regional enteritis] of:
  • duodenum
  • ileum
  • jejunum
Ileitis:
  • regional
  • terminal
Excl.:
with Crohn disease of large intestine ( K50.8)
K50.1 Crohn disease of large intestine
Incl.:
Colitis:
  • granulomatous
  • regional
Crohn disease [regional enteritis] of:
  • colon
  • large bowel
  • rectum
Excl.:
with Crohn disease of small intestine ( K50.8)
K50.8 Other Crohn disease
Incl.:
Crohn disease of both small and large intestine
K50.9 Crohn disease, unspecified
Incl.:
Regional enteritis NOS

K51 Ulcerative colitis

K51.0 Ulcerative (chronic) pancolitis
Incl.:
backwash ileitis
K51.2 Ulcerative (chronic) proctitis
K51.3 Ulcerative (chronic) rectosigmoiditis
K51.4 Inflammatory polyps
K51.5 Left sided colitis
Incl.:
left hemicolitis
K51.8 Other ulcerative colitis
K51.9 Ulcerative colitis, unspecified

K52 Other noninfective gastroenteritis and colitis

K52.0 Gastroenteritis and colitis due to radiation
K52.1 Toxic gastroenteritis and colitis
Incl.:
Drug-induced gastroenteritis and colitis
Coding-Hint
Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced, or toxic agent.
K52.2 Allergic and dietetic gastroenteritis and colitis
Incl.:
Food hypersensitivity gastroenteritis or colitis
K52.3 Indeterminate colitis
DCS.XI.6
K52.8 Other specified noninfective gastroenteritis and colitis
Incl.:
Collagenous colitis
Eosinophilic gastritis or gastroenteritis
Lymphocytic colitis
Microscopic colitis (collagenous colitis or lymphocytic colitis)
K52.9 Noninfective gastroenteritis and colitis, unspecified
Incl.:
  • Diarrhoea
  • Enteritis
  • Ileitis
  • Jejunitis
  • Sigmoiditis
  • specified as noninfectious
Excl.:
colitis, diarrhoea, enteritis, gastroenteritis:
functional diarrhoea ( K59.1)
neonatal diarrhoea (noninfective) ( P78.3)
psychogenic diarrhoea ( F45.3)