Circular 06/2026

Chapter XI — Diseases of the digestive system

22 chapters · 15,844 codes · Quick search →

K00-K14 — Diseases of oral cavity, salivary glands and jaws

K00Disorders of tooth development and eruption K01Embedded and impacted teeth K02Dental caries K03Other diseases of hard tissues of teeth K04Diseases of pulp and periapical tissues K05Gingivitis and periodontal diseases K06Other disorders of gingiva and edentulous alveolar ridge K07Dentofacial anomalies [including malocclusion]K08Other disorders of teeth and supporting structures K09Cysts of oral region, not elsewhere classified K10Other diseases of jaws K11Diseases of salivary glands K12Stomatitis and related lesions K13Other diseases of lip and oral mucosa K14Diseases of tongue

K20-K31 — Diseases of oesophagus, stomach and duodenum

K20Oesophagitis K21Gastro-oesophageal reflux disease K22Other diseases of oesophagus K23*Disorders of oesophagus in diseases classified elsewhere K25Gastric ulcer K26Duodenal ulcer K27Peptic ulcer, site unspecified K28Gastrojejunal ulcer K29Gastritis and duodenitis K30Functional dyspepsia K31Other diseases of stomach and duodenum

K35-K38 — Diseases of appendix

K35Acute appendicitis K36Other appendicitis K37Unspecified appendicitis K38Other diseases of appendix

K40-K46 — Hernia

K40Inguinal hernia K41Femoral hernia K42Umbilical hernia K43Ventral hernia K44Diaphragmatic hernia K45Other abdominal hernia K46Unspecified abdominal hernia

K50-K52 — Noninfective enteritis and colitis

K50Crohn disease [regional enteritis]K51Ulcerative colitis K52Other noninfective gastroenteritis and colitis

K55-K64 — Other diseases of intestines

K55Vascular disorders of intestine K56Paralytic ileus and intestinal obstruction without hernia K57Diverticular disease of intestine K58Irritable bowel syndrome K59Other functional intestinal disorders K60Fissure and fistula of anal and rectal regions K61Abscess of anal and rectal regions K62Other diseases of anus and rectum K63Other diseases of intestine K64Haemorrhoids and perianal venous thrombosis

K65-K67 — Diseases of peritoneum

K65Peritonitis K66Other disorders of peritoneum K67*Disorders of peritoneum in infectious diseases classified elsewhere

K70-K77 — Diseases of liver

K70Alcoholic liver disease K71Toxic liver disease K72Hepatic failure, not elsewhere classified K73Chronic hepatitis, not elsewhere classified K74Fibrosis and cirrhosis of liver K75Other inflammatory liver diseases K76Other diseases of liver K77*Liver disorders in diseases classified elsewhere

K80-K87 — Disorders of gallbladder, biliary tract and pancreas

K80Cholelithiasis K81Cholecystitis K82Other diseases of gallbladder K83Other diseases of biliary tract K85Acute pancreatitis K86Other diseases of pancreas K87*Disorders of gallbladder, biliary tract and pancreas in diseases classified elsewhere

K90-K93 — Other diseases of the digestive system

K90Intestinal malabsorption K91Postprocedural disorders of digestive system, not elsewhere classified K92Other diseases of digestive system K93*Disorders of other digestive organs in diseases classified elsewhere