List of ICD-9 codes 520-579: Diseases of the digestive system

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

9. Diseases of the digestive system (520-579)

diseases of oral cavity, salivary glands, and jaws (520-529)

• (520) Disorders of tooth development and eruption
• (521) Diseases of hard tissues of teeth
  • (521.0) Dental caries
• (522) Diseases of pulp and periapical tissues
• (523) Gingival and periodontal diseases
  • (523.1) Gingivitis, chronic
• (524) Dentofacial anomalies, including malocclusion
• (525) Other diseases and conditions of the teeth and supporting structures
• (526) Diseases of the jaws
  • (526.81) Torus Mandibularis, Torus palatinus
• (527) Diseases of the salivary glands
  • (527.2) Parotitis
• (528) Diseases of the oral soft tissues, excluding lesions specific for gingiva and tongue
  • (528.0) Stomatitis
  • (528.2) Aphthous ulcer
  • (528.6) Leukoplakia, oral mucosa
  • (528.7) Erythroplakia
• (529) Diseases and other conditions of the tongue
  • (529.0) Glossitis

diseases of esophagus, stomach, and duodenum (530-537)

• (530) Diseases of esophagus
  • (530.0) Achalasia/cardiospasm
  • (530.1) Esophagitis, unspec.
  • (530.3) Esophageal stricture/stenosis
  • (530.8) Other specified disorders of esophagus
    • (530.81) Gastroesophageal reflux, no esophagitis
    • (530.85) Barrett's esophagitis
• (531) Gastric ulcer
• (532) Duodenal ulcer
• (533) Peptic ulcer, site unspecified
• (534) Gastrojejunal ulcer
• (535) Gastritis and duodenitis
  • (535.0) Acute gastritis
  • (535.6) Duodenitis
• (536) Disorders of function of stomach
  • (536.3) Gastroparesis
  • (536.8) Dyspepsia
• (537) Other disorders of stomach and duodenum

appendicitis (540-543)

• (540) Acute appendicitis
  • (540.0) Appendicitis, acute w/ gen. peritonitis
  • (540.9) Appendicitis, acute w/o peritonitis
• (541) Appendicitis, unqualified
• (542) Other appendicitis
• (543) Other diseases of appendix

hernia of abdominal cavity (550-553)

• (550) Inguinal hernia
  • (550.9) Hernia, inguinal, NOS, unilateral
• (551) Other hernia of abdominal cavity, with gangrene
• (552) Other hernia of abdominal cavity with obstruction, without mention
• (553) Other hernia of abdominal cavity without mention of obstruction or
  • (553.0) Hernia, femoral, unilateral
  • (553.1) Hernia, umbilical
  • (553.2) Hernia, ventral, unspec.
    • (553.21) Hernia, ventral, incisional
  • (553.3) Hernia, hiatal, noncongenital
  • (553.9) Hernias, other, NOS

noninfectious enteritis and colitis (555-558)

• (555) Regional enteritis
  • (555.0) Crohn's, small intestine
  • (555.1) Crohn's, large intestine
  • (555.9) Crohn's disease, NOS
• (556) Idiopathic proctocolitis
  • (556.9) Ulcerative colitis, unspec.
• (557) Vascular insufficiency of intestine
  • (557.0) Vascular insufficiency, acute, intestine
  • (557.9) Ischemic bowel disease, unspec.
• (558) Other noninfectious gastroenteritis and colitis
  • (558.9) Gastroenteritis, noninfectious, unspec.

other diseases of intestines and peritoneum (560-569)

• (560) Intestinal obstruction without mention of hernia
  • (560.1) Ileus
  • (560.3) Impaction of intestine
  • (560.9) Intestinal obstruction, unspec.
• (562) Diverticula of intestine
  • (562.1) Diverticulosis of colon
    • (562.11) Diverticulitis of colon, NOS
    • (562.12) Diverticulosis, colon w/ hemorrhage
• (564) Functional digestive disorders, not elsewhere classified
  • (564.0) Constipation, unspec.
  • (564.1) Irritable bowel syndrome
  • (564.2) Post-gastric-surgery syndromes
  • (564.4) Postoperative functional disorders
  • (564.6) Anal spasm
• (565) Anal fissure and fistula
  • (565.0) Anal fissure, nontraumatic
• (566) Abscess of anal and rectal regions
  • (566.0) Abscess, perianal
• (567) Peritonitis
• (568) Other disorders of peritoneum
  • (568.0) Peritoneal adhesions
  • (568.8) Other specified disorders of peritoneum
    • Pneumoperitoneum

• (569) Other disorders of intestine
  • (569.3) Bleeding, rectal
    • (569.61) Infection, colostomy/enterostomy
    • (569.62) Mechanical complication of ostomy
    • (569.85) Angiodysplasia, intestine w/ hemorrhage

other diseases of digestive system (570-579)

• (570) Acute and subacute necrosis of liver
  • (570.0) Hepatic failure, acute
• (571) Chronic liver disease and cirrhosis
  • (571.0) Fatty liver, alcoholic
  • (571.2) Cirrhosis, liver, alcoholic
  • (571.4) Hepatitis, chronic, unspec.
  • (571.5) Cirrhosis, NOS
  • (571.6) Primary biliary cirrhosis
  • (571.9) Liver disease, chronic, unspec.
• (572) Liver abscess and sequelae of chronic liver disease
  • (572.2) Coma, hepatic
  • (572.4) Hepatorenal syndrome
• (573) Other disorders of liver
  • (573.3) Hepatitis, toxic
• (574) Cholelithiasis
  • (574.3) Choledocholithiasis
• (575) Other disorders of gallbladder
  • (575.0) Cholecystitis, acute
  • (575.9) Gallbladder disease, unspec.

• (576) Other disorders of biliary tract
  • (576.1) Cholangitis
  • (576.2) Obstruction of bile duct
    • Mirizzi's syndrome

• (577) Diseases of pancreas
  • (577.0) Pancreatitis, acute
  • (577.1) Pancreatitis, chronic
  • (577.2) Pancreatic cyst, pseudocyst
• (578) Gastrointestinal hemorrhage
  • (578.0) Hematemesis
  • (578.1) Blood in stool, melena
• (579) Intestinal malabsorption
  • (579.0) Coeliac disease
  • (579.9) Malabsorption, NOS

See also

• List of ICD-9 codes

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