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

This is a shortened version of the ninth chapter of the ICD-9: Diseases of the Digestive System. It covers ICD codes 520 to 579. The full chapter can be found on pages 301 to 328 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1. Both volumes can be downloaded for free from the website of the World Health Organization.

Diseases of oral cavity, salivary glands, and jaws (520–529)

 * Disorders of tooth development and eruption
 * Anodontia
 * Supernumerary teeth
 * Abnormalities of size and form of teeth
 * Mottled teeth
 * Disturbances of tooth formation
 * Hereditary disturbances in tooth structure not elsewhere classified
 * Disturbances in tooth eruption
 * Teething syndrome
 * Diseases of hard tissues of teeth
 * Dental caries
 * Excessive attrition
 * Abrasion of teeth
 * Erosion of teeth
 * Pathological tooth resorption
 * Hypercementosis
 * Ankylosis of teeth
 * Intrinsic posteruptive color changes of teeth
 * Other specified diseases of hard tissues of teeth
 * Cracked tooth
 * Diseases of pulp and periapical tissues
 * Gingival and periodontal diseases
 * Gingivitis, chronic
 * Dentofacial anomalies, including malocclusion
 * Major anomalies of jaw size
 * Major anomalies of jaw size maxillary hypoplasia
 * Anomalies of relationship of jaw to cranial base
 * Anomalies of dental arch relationship
 * Anomalies of tooth position of fully erupted teeth
 * Malocclusion unspecified
 * Dentofacial functional abnormalities
 * Temporomandibular joint disorders
 * Dental alveolar anomalies
 * Other specified dentofacial anomalies
 * Other diseases and conditions of the teeth and supporting structures
 * Diseases of the jaws
 * Developmental odontogenic cysts
 * Fissural cysts of jaw
 * Other cysts of jaws
 * Central giant cell (reparative) granuloma
 * Inflammatory conditions of jaw
 * Alveolitis of jaw
 * Periradicular pathology associated with previous endodontic treatment
 * Other specified diseases of the jaws
 * Exostosis of jaw
 * Diseases of the salivary glands
 * Atrophy of salivary gland
 * Hypertrophy of salivary gland
 * Sialoadenitis
 * Abscess of salivary gland
 * Fistula of salivary gland
 * Sialolithiasis
 * Mucocele of salivary gland
 * Disturbance of salivary secretion
 * Diseases of the oral soft tissues, excluding lesions specific for gingiva and tongue
 * Stomatitis
 * Cancrum oris
 * Aphthous ulcer, Oral aphthae
 * Cellulitis and abscess of oral soft tissues
 * Cysts of oral soft tissues
 * Diseases of lips
 * Leukoplakia of oral mucosa including tongue
 * Leukoplakia, oral mucosa
 * Other disturbances of oral epithelium including tongue
 * Erythroplakia
 * Oral submucosal fibrosis, including of tongue
 * Other and unspecified diseases of the oral soft tissues
 * Diseases and other conditions of the tongue
 * Glossitis

Diseases of esophagus, stomach, and duodenum (530–539)

 * Diseases of esophagus
 * Achalasia/cardiospasm
 * Esophagitis, unspec.
 * Esophageal stricture/stenosis
 * Other specified disorders of esophagus
 * Gastroesophageal reflux, no esophagitis
 * Barrett's esophagitis
 * Gastric ulcer
 * Duodenal ulcer
 * Peptic ulcer, site unspecified
 * Gastrojejunal ulcer
 * Gastritis and duodenitis
 * Acute gastritis
 * Duodenitis
 * Disorders of function of stomach
 * Gastroparesis
 * Dyspepsia
 * Other disorders of stomach and duodenum
 * Gastrointestinal mucositis (ulcerative)
 * Complications of bariatric procedures

Appendicitis (540–543)

 * Acute appendicitis
 * Appendicitis, acute w/ gen. peritonitis
 * Appendicitis, acute w/o peritonitis
 * Appendicitis, unqualified
 * Other appendicitis
 * Other diseases of appendix

Hernia of abdominal cavity (550–553)

 * Inguinal hernia
 * Hernia, inguinal, NOS, unilateral
 * Other hernia of abdominal cavity, with gangrene
 * Other hernia of abdominal cavity with obstruction, without mention
 * Other hernia of abdominal cavity without mention of obstruction
 * Hernia, femoral, unilateral
 * Hernia, umbilical
 * Hernia, ventral, unspec.
 * Hernia, ventral, incisional
 * Hernia, hiatal, noncongenital
 * Hernias, other, NOS

Noninfectious enteritis and colitis (555–558)

 * Regional enteritis
 * Crohn's, small intestine
 * Crohn's, large intestine
 * Crohn's disease, NOS
 * Idiopathic proctocolitis
 * Ulcerative colitis, unspec.
 * Vascular insufficiency of intestine
 * Vascular insufficiency, acute, intestine
 * Ischemic bowel disease, unspec.
 * Other noninfectious gastroenteritis and colitis
 * Gastroenteritis, noninfectious, unspec.

Other diseases of intestines and peritoneum (560–569)

 * , Intestinal obstruction without mention of hernia
 * , Ileus
 * , Impaction of intestine
 * , Intestinal obstruction unspec
 * , Diverticula of intestine
 * , Diverticulosis of colon
 * , Diverticulitis of colon, NOS
 * , Diverticulosis colon w/ hemorrhage
 * , Functional digestive disorders not elsewhere classified
 * , Constipation unspec
 * , Irritable bowel syndrome
 * , Post-gastric-surgery syndromes
 * , Postoperative functional disorders
 * , Anal spasm
 * , Anal fissure and fistula
 * , Anal fissure nontraumatic
 * , Abscess of anal and rectal regions
 * , Abscess perianal
 * , Peritonitis
 * , Peritonitis in infectious diseases classified elsewhere
 * , Pneumococcal peritonitis
 * , Other suppurative peritonitis
 * , Peritonitis (acute) generalized
 * , Peritoneal abscess
 * , Spontaneous bacterial peritonitis
 * , Retroperitoneal infections
 * , Psoas muscle abscess
 * , Other disorders of peritoneum
 * , Peritoneal adhesions
 * , Other specified disorders of peritoneum
 * Pneumoperitoneum
 * , Other disorders of intestine
 * , Bleeding rectal
 * , Infection colostomy/enterostomy
 * , Mechanical complication of ostomy
 * , Angiodysplasia intestine w/ hemorrhage

Liver

 * Acute and subacute necrosis of liver
 * Hepatic failure, acute
 * Chronic liver disease and cirrhosis
 * Fatty liver, alcoholic
 * Cirrhosis, liver, alcoholic
 * Hepatitis, chronic, unspec.
 * Cirrhosis, NOS
 * Primary biliary cirrhosis
 * Liver disease, chronic, unspec.
 * Liver abscess and sequelae of chronic liver disease
 * Coma, hepatic
 * Hepatorenal syndrome
 * Other disorders of liver
 * Hepatitis, toxic

Gallbladder

 * Cholelithiasis
 * Choledocholithiasis
 * Other disorders of gallbladder
 * Cholecystitis, acute
 * Gallbladder disease, unspec.

Other biliary tract

 * Other disorders of biliary tract
 * Postcholecystectomy syndrome
 * Cholangitis
 * Obstruction of bile duct
 * Mirizzi's syndrome
 * Perforation of bile duct
 * Fistula of bile duct
 * Spasm of sphincter of oddi

Other

 * Diseases of pancreas
 * Pancreatitis, acute
 * Pancreatitis, chronic
 * Pancreatic cyst, pseudocyst
 * Gastrointestinal hemorrhage
 * Hematemesis
 * Blood in stool, melena
 * Intestinal malabsorption
 * Coeliac disease
 * Tropical sprue
 * Blind loop syndrome
 * Other and unspecified postsurgical nonabsorption
 * Short bowel syndrome
 * Pancreatic steatorrhea
 * Other specified intestinal malabsorption
 * Protein losing enteropathy
 * Unspecified intestinal malabsorption