Chapter 11: Diseases of the digestive system (K00-K95)

72 code categories · 10 sections · ICD-10-CM 2026

Sections

K00-K14 Diseases of oral cavity and salivary glands (K00-K14)
K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31)
K35-K38 Diseases of appendix (K35-K38)
K40-K46 Hernia (K40-K46)
K50-K52 Noninfective enteritis and colitis (K50-K52)
K55-K64 Other diseases of intestines (K55-K64)
K65-K68 Diseases of peritoneum and retroperitoneum (K65-K68)
K70-K77 Diseases of liver (K70-K77)
K80-K87 Disorders of gallbladder, biliary tract and pancreas (K80-K87)
K90-K95 Other diseases of the digestive system (K90-K95)

Code Categories

K00 Disorders of tooth development and eruption K01 Embedded and impacted teeth K02 Dental caries K03 Other diseases of hard tissues of teeth K04 Diseases of pulp and periapical tissues K05 Gingivitis and periodontal diseases K06 Other disorders of gingiva and edentulous alveolar ridge K08 Other disorders of teeth and supporting structures K09 Cysts of oral region, not elsewhere classified K11 Diseases of salivary glands K12 Stomatitis and related lesions K13 Other diseases of lip and oral mucosa K14 Diseases of tongue K20 Esophagitis K21 Gastro-esophageal reflux disease K22 Other diseases of esophagus K23 Disorders of esophagus in diseases classified elsewhere K25 Gastric ulcer K26 Duodenal ulcer K27 Peptic ulcer, site unspecified K28 Gastrojejunal ulcer K29 Gastritis and duodenitis K30 Functional dyspepsia K31 Other diseases of stomach and duodenum K35 Acute appendicitis K36 Other appendicitis K37 Unspecified appendicitis K38 Other diseases of appendix K40 Inguinal hernia K41 Femoral hernia K42 Umbilical hernia K43 Ventral hernia K44 Diaphragmatic hernia K45 Other abdominal hernia K46 Unspecified abdominal hernia K50 Crohn's disease [regional enteritis] K51 Ulcerative colitis K52 Other and unspecified noninfective gastroenteritis and colitis K55 Vascular disorders of intestine K56 Paralytic ileus and intestinal obstruction without hernia K57 Diverticular disease of intestine K58 Irritable bowel syndrome K59 Other functional intestinal disorders K60 Fissure and fistula of anal and rectal regions K61 Abscess of anal and rectal regions K62 Other diseases of anus and rectum K63 Other diseases of intestine K64 Hemorrhoids and perianal venous thrombosis K65 Peritonitis K66 Other disorders of peritoneum K67 Disorders of peritoneum in infectious diseases classified elsewhere K68 Disorders of retroperitoneum K70 Alcoholic liver disease K71 Toxic liver disease K72 Hepatic failure, not elsewhere classified K73 Chronic hepatitis, not elsewhere classified K74 Fibrosis and cirrhosis of liver K75 Other inflammatory liver diseases K76 Other diseases of liver K77 Liver disorders in diseases classified elsewhere K80 Cholelithiasis K81 Cholecystitis K82 Other diseases of gallbladder K83 Other diseases of biliary tract K85 Acute pancreatitis K86 Other diseases of pancreas K87 Disorders of gallbladder, biliary tract and pancreas in diseases classified elsewhere K90 Intestinal malabsorption K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified K92 Other diseases of digestive system K94 Complications of artificial openings of the digestive system K95 Complications of bariatric procedures
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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