NONINFECTIOUS ENTERITIS AND COLITIS (555-558)

• 555 Regional enteritis
  • Includes: Crohn's disease
    • Granulomatous enteritis
  • Excludes: ulcerative colitis (556)
  • 555.0 Small intestine
    • Ileitis:
      • regional
      • segmental
      • terminal
    • Regional enteritis or Crohn's disease of:
      • duodenum
      • ileum
      • jejunum
  • 555.1 Large intestine
    • Colitis:
      • granulomatous
      • regional
      • transmural
    • Regional enteritis or Crohn's disease of:
      • colon
      • large bowel
      • rectum
  • 555.2 Small intestine with large intestine
    • Regional ileocolitis
  • 555.9 Unspecified site
    • Crohn's disease NOS
    • Regional enteritis NOS
• 556 Ulcerative colitis
  • 556.0 Ulcerative (chronic) enterocolitis
  • 556.1 Ulcerative (chronic) ileocolitis
  • 556.2 Ulcerative (chronic) proctitis
  • 556.3 Ulcerative (chronic) proctosigmoiditis
  • 556.4 Pseudopolyposis of colon
  • 556.5 Left-sided ulcerative (chronic) colitis
  • 556.6 Universal ulcerative (chronic) colitis
    • Pancolitis
  • 556.8 Other ulcerative colitis
  • 556.9 Ulcerative colitis, unspecified
    • Ulcerative enteritis NOS
• 557 Vascular insufficiency of intestine
  • Excludes: necrotizing enterocolitis of the newborn (777.5)
  • 557.0 Acute vascular insufficiency of intestine
    • Acute:
      • hemorrhagic enterocolitis
      • ischemic colitis, enteritis, or enterocolitis
      • massive necrosis of intestine
    • Bowel infarction
    • Embolism of mesenteric artery
    • Fulminant enterocolitis
    • Hemorrhagic necrosis of intestine
    • Intestinal gangrene
    • Intestinal infarction (acute) (agnogenic) (hemorrhagic) (nonocclusive)
    • Mesenteric infarction (embolic) (thrombotic)
    • Terminal hemorrhagic enteropathy
    • Thrombosis of mesenteric artery
  • 557.1 Chronic vascular insufficiency of intestine
    • Angina, abdominal
    • Chronic ischemic colitis, enteritis, or enterocolitis
    • Ischemic stricture of intestine
    • Mesenteric:
      • angina
      • artery syndrome (superior)
      • vascular insufficiency
  • 557.9 Unspecified vascular insufficiency of intestine
    • Alimentary pain due to vascular insufficiency
    • Ischemic colitis, enteritis, or enterocolitis NOS
• 558 Other noninfectious gastroenteritis and colitis
  • Excludes: infectious:
    • colitis, enteritis, or gastroenteritis (009.0-009.1)
    • diarrhea (009.2-009.3)
  • 558.1 Gastroenteritis and colitis due to radiation
    • Radiation enterocolitis
  • 558.2 Toxic gastroenteritis and colitis
    • Use additional E code to identify cause
  • 558.9 Other and unspecified noninfectious gastroenteritis and colitis
    • Colitis, NOS, allergic, dietetic, or noninfectious
    • Diarrhea, allergic, dietetic, or noninfectious
    • Enteritis, NOS, allergic, dietetic, or noninfectious
    • Gastroenteritis, NOS, allergic, dietetic, or noninfectious
    • Ileitis, NOS, allergic, dietetic, or noninfectious
    • Jejunitis, NOS, allergic, dietetic, or noninfectious
    • Sigmoiditis, NOS, allergic, dietetic, or noninfectious