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 colitis
 * Microscopic colitis (collagenous or lymphocytic)
 * K52.9 Noninfective gastroenteritis and colitis, unspecified
 * Colitis NOS
 * Enteritis NOS
 * Gastroenteritis NOS
 * Ileitis NOS
 * Jejunitis NOS
 * Sigmoiditis NOS
 * Excludes1: diarrhea NOS (R19.7)
 * functional diarrhea (K59.1)
 * infectious gastroenteritis and colitis NOS (A09)
 * neonatal diarrhea (noninfective) (P78.3)
 * psychogenic diarrhea (F45.8)

=Other diseases of intestines (K55-K63)=

K55 Vascular disorders of intestine

 * Excludes1: necrotizing enterocolitis of newborn (P77.-)
 * K55.0 Acute vascular disorders of intestine
 * Acute fulminant ischemic colitis
 * Acute intestinal infarction
 * Acute small intestine ischemia
 * Infarction of appendices epiploicae
 * Mesenteric (artery) (vein) embolism
 * Mesenteric (artery) (vein) infarction
 * Mesenteric (artery) (vein) thrombosis
 * Necrosis of intestine
 * Subacute ischemic colitis
 * K55.1 Chronic vascular disorders of intestine
 * Chronic ischemic colitis
 * Chronic ischemic enteritis
 * Chronic ischemic enterocolitis
 * Ischemic stricture of intestine
 * Mesenteric atherosclerosis
 * Mesenteric vascular insufficiency
 * K55.2 Angiodysplasia of colon
 * K55.20 Angiodysplasia of colon without hemorrhage
 * K55.21 Angiodysplasia of colon with hemorrhage
 * K55.8 Other vascular disorders of intestine
 * K55.9 Vascular disorder of intestine, unspecified
 * Ischemic colitis
 * Ischemic enteritis
 * Ischemic enterocolitis

K56 Paralytic ileus and intestinal obstruction without hernia

 * Excludes1: