9. DISEASES OF THE DIGESTIVE SYSTEM (520-579)
NONINFECTIOUS ENTERITIS AND COLITIS (555-558)
555: Regional enteritis
Includes:
Crohn's disease
Granulomatous enteritis
Excludes:
ulcerative colitis (556)
556: Ulcerative colitis
557: Vascular insufficiency of intestine
Excludes:
necrotizing enterocolitis of the newborn (777.50-777.53)
558: Other and unspecified noninfectious gastroenteritis and colitis
Excludes:
infectious:
colitis, enteritis, or gastroenteritis (009.0-009.1)
diarrhea (009.2-009.3)
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