| A000 | Cholera due to Vibrio cholerae 01, biovar cholerae |
| A001 | Cholera due to Vibrio cholerae 01, biovar eltor |
| A009 | Cholera, unspecified |
| A020 | Salmonella enteritis |
| A030 | Shigellosis due to Shigella dysenteriae |
| A031 | Shigellosis due to Shigella flexneri |
| A032 | Shigellosis due to Shigella boydii |
| A033 | Shigellosis due to Shigella sonnei |
| A038 | Other shigellosis |
| A039 | Shigellosis, unspecified |
| A040 | Enteropathogenic Escherichia coli infection |
| A041 | Enterotoxigenic Escherichia coli infection |
| A042 | Enteroinvasive Escherichia coli infection |
| A043 | Enterohemorrhagic Escherichia coli infection |
| A044 | Other intestinal Escherichia coli infections |
| A045 | Campylobacter enteritis |
| A046 | Enteritis due to Yersinia enterocolitica |
| A0471 | Enterocolitis due to Clostridium difficile, recurrent |
| A0472 | Enterocolitis due to Clostridium difficile, not specified as recurrent |
| A048 | Other specified bacterial intestinal infections |
| A049 | Bacterial intestinal infection, unspecified |
| A050 | Foodborne staphylococcal intoxication |
| A052 | Foodborne Clostridium perfringens [Clostridium welchii] intoxication |
| A053 | Foodborne Vibrio parahaemolyticus intoxication |
| A054 | Foodborne Bacillus cereus intoxication |
| A055 | Foodborne Vibrio vulnificus intoxication |
| A058 | Other specified bacterial foodborne intoxications |
| A059 | Bacterial foodborne intoxication, unspecified |
| A060 | Acute amebic dysentery |
| A061 | Chronic intestinal amebiasis |
| A062 | Amebic nondysenteric colitis |
| A070 | Balantidiasis |
| A071 | Giardiasis [lambliasis] |
| A072 | Cryptosporidiosis |
| A073 | Isosporiasis |
| A074 | Cyclosporiasis |
| A078 | Other specified protozoal intestinal diseases |
| A079 | Protozoal intestinal disease, unspecified |
| A080 | Rotaviral enteritis |
| A0811 | Acute gastroenteropathy due to Norwalk agent |
| A0819 | Acute gastroenteropathy due to other small round viruses |
| A082 | Adenoviral enteritis |
| A0831 | Calicivirus enteritis |
| A0832 | Astrovirus enteritis |
| A0839 | Other viral enteritis |
| A084 | Viral intestinal infection, unspecified |
| A088 | Other specified intestinal infections |
| A09 | Infectious gastroenteritis and colitis, unspecified |
| A1831 | Tuberculous peritonitis |
| A1832 | Tuberculous enteritis |
| A1839 | Retroperitoneal tuberculosis |
| A1883 | Tuberculosis of digestive tract organs, not elsewhere classified |
| A213 | Gastrointestinal tularemia |
| A222 | Gastrointestinal anthrax |
| A421 | Abdominal actinomycosis |
| A511 | Primary anal syphilis |
| A546 | Gonococcal infection of anus and rectum |
| A5485 | Gonococcal peritonitis |
| A563 | Chlamydial infection of anus and rectum |
| B0081 | Herpesviral hepatitis |
| B3781 | Candidal esophagitis |
| B3782 | Candidal enteritis |
| B680 | Taenia solium taeniasis |
| B681 | Taenia saginata taeniasis |
| B689 | Taeniasis, unspecified |
| B690 | Cysticercosis of central nervous system |
| B691 | Cysticercosis of eye |
| B6981 | Myositis in cysticercosis |
| B6989 | Cysticercosis of other sites |
| B699 | Cysticercosis, unspecified |
| B700 | Diphyllobothriasis |
| B701 | Sparganosis |
| B710 | Hymenolepiasis |
| B711 | Dipylidiasis |
| B718 | Other specified cestode infections |
| B719 | Cestode infection, unspecified |
| B760 | Ancylostomiasis |
| B761 | Necatoriasis |
| B768 | Other hookworm diseases |
| B769 | Hookworm disease, unspecified |
| B770 | Ascariasis with intestinal complications |
| B7781 | Ascariasis pneumonia |
| B7789 | Ascariasis with other complications |
| B779 | Ascariasis, unspecified |
| B780 | Intestinal strongyloidiasis |
| B787 | Disseminated strongyloidiasis |
| B789 | Strongyloidiasis, unspecified |
| B79 | Trichuriasis |
| B80 | Enterobiasis |
| B810 | Anisakiasis |
| B811 | Intestinal capillariasis |
| B812 | Trichostrongyliasis |
| B813 | Intestinal angiostrongyliasis |
| B818 | Other specified intestinal helminthiases |
| B820 | Intestinal helminthiasis, unspecified |
| B829 | Intestinal parasitism, unspecified |
| C153 | Malignant neoplasm of upper third of esophagus |
| C154 | Malignant neoplasm of middle third of esophagus |
| C155 | Malignant neoplasm of lower third of esophagus |
| C158 | Malignant neoplasm of overlapping sites of esophagus |
| C159 | Malignant neoplasm of esophagus, unspecified |
| C160 | Malignant neoplasm of cardia |
| C161 | Malignant neoplasm of fundus of stomach |
| C162 | Malignant neoplasm of body of stomach |
| C163 | Malignant neoplasm of pyloric antrum |
| C164 | Malignant neoplasm of pylorus |
| C165 | Malignant neoplasm of lesser curvature of stomach, unspecified |
| C166 | Malignant neoplasm of greater curvature of stomach, unspecified |
| C168 | Malignant neoplasm of overlapping sites of stomach |
| C169 | Malignant neoplasm of stomach, unspecified |
| C170 | Malignant neoplasm of duodenum |
| C171 | Malignant neoplasm of jejunum |
| C172 | Malignant neoplasm of ileum |
| C173 | Meckel's diverticulum, malignant |
| C178 | Malignant neoplasm of overlapping sites of small intestine |
| C179 | Malignant neoplasm of small intestine, unspecified |
| C180 | Malignant neoplasm of cecum |
| C181 | Malignant neoplasm of appendix |
| C182 | Malignant neoplasm of ascending colon |
| C183 | Malignant neoplasm of hepatic flexure |
| C184 | Malignant neoplasm of transverse colon |
| C185 | Malignant neoplasm of splenic flexure |
| C186 | Malignant neoplasm of descending colon |
| C187 | Malignant neoplasm of sigmoid colon |
| C188 | Malignant neoplasm of overlapping sites of colon |
| C189 | Malignant neoplasm of colon, unspecified |
| C19 | Malignant neoplasm of rectosigmoid junction |
| C20 | Malignant neoplasm of rectum |
| C210 | Malignant neoplasm of anus, unspecified |
| C211 | Malignant neoplasm of anal canal |
| C212 | Malignant neoplasm of cloacogenic zone |
| C218 | Malignant neoplasm of overlapping sites of rectum, anus and anal canal |
| C260 | Malignant neoplasm of intestinal tract, part unspecified |
| C269 | Malignant neoplasm of ill-defined sites within the digestive system |
| C451 | Mesothelioma of peritoneum |
| C464 | Kaposi's sarcoma of gastrointestinal sites |
| C481 | Malignant neoplasm of specified parts of peritoneum |
| C482 | Malignant neoplasm of peritoneum, unspecified |
| C488 | Malignant neoplasm of overlapping sites of retroperitoneum and peritoneum |
| C49A0 | Gastrointestinal stromal tumor, unspecified site |
| C49A1 | Gastrointestinal stromal tumor of esophagus |
| C49A2 | Gastrointestinal stromal tumor of stomach |
| C49A3 | Gastrointestinal stromal tumor of small intestine |
| C49A4 | Gastrointestinal stromal tumor of large intestine |
| C49A5 | Gastrointestinal stromal tumor of rectum |
| C49A9 | Gastrointestinal stromal tumor of other sites |
| C762 | Malignant neoplasm of abdomen |
| C784 | Secondary malignant neoplasm of small intestine |
| C785 | Secondary malignant neoplasm of large intestine and rectum |
| C786 | Secondary malignant neoplasm of retroperitoneum and peritoneum |
| C7880 | Secondary malignant neoplasm of unspecified digestive organ |
| C7889 | Secondary malignant neoplasm of other digestive organs |
| C7A010 | Malignant carcinoid tumor of the duodenum |
| C7A011 | Malignant carcinoid tumor of the jejunum |
| C7A012 | Malignant carcinoid tumor of the ileum |
| C7A019 | Malignant carcinoid tumor of the small intestine, unspecified portion |
| C7A020 | Malignant carcinoid tumor of the appendix |
| C7A021 | Malignant carcinoid tumor of the cecum |
| C7A022 | Malignant carcinoid tumor of the ascending colon |
| C7A023 | Malignant carcinoid tumor of the transverse colon |
| C7A024 | Malignant carcinoid tumor of the descending colon |
| C7A025 | Malignant carcinoid tumor of the sigmoid colon |
| C7A026 | Malignant carcinoid tumor of the rectum |
| C7A029 | Malignant carcinoid tumor of the large intestine, unspecified portion |
| C7A092 | Malignant carcinoid tumor of the stomach |
| C7A094 | Malignant carcinoid tumor of the foregut, unspecified |
| C7A095 | Malignant carcinoid tumor of the midgut, unspecified |
| C7A096 | Malignant carcinoid tumor of the hindgut, unspecified |
| C7B04 | Secondary carcinoid tumors of peritoneum |
| D001 | Carcinoma in situ of esophagus |
| D002 | Carcinoma in situ of stomach |
| D010 | Carcinoma in situ of colon |
| D011 | Carcinoma in situ of rectosigmoid junction |
| D012 | Carcinoma in situ of rectum |
| D013 | Carcinoma in situ of anus and anal canal |
| D0140 | Carcinoma in situ of unspecified part of intestine |
| D0149 | Carcinoma in situ of other parts of intestine |
| D017 | Carcinoma in situ of other specified digestive organs |
| D019 | Carcinoma in situ of digestive organ, unspecified |
| D120 | Benign neoplasm of cecum |
| D121 | Benign neoplasm of appendix |
| D122 | Benign neoplasm of ascending colon |
| D123 | Benign neoplasm of transverse colon |
| D124 | Benign neoplasm of descending colon |
| D125 | Benign neoplasm of sigmoid colon |
| D126 | Benign neoplasm of colon, unspecified |
| D127 | Benign neoplasm of rectosigmoid junction |
| D128 | Benign neoplasm of rectum |
| D129 | Benign neoplasm of anus and anal canal |
| D130 | Benign neoplasm of esophagus |
| D131 | Benign neoplasm of stomach |
| D132 | Benign neoplasm of duodenum |
| D1330 | Benign neoplasm of unspecified part of small intestine |
| D1339 | Benign neoplasm of other parts of small intestine |
| D139 | Benign neoplasm of ill-defined sites within the digestive system |
| D175 | Benign lipomatous neoplasm of intra-abdominal organs |
| D1803 | Hemangioma of intra-abdominal structures |
| D191 | Benign neoplasm of mesothelial tissue of peritoneum |
| D200 | Benign neoplasm of soft tissue of retroperitoneum |
| D201 | Benign neoplasm of soft tissue of peritoneum |
| D371 | Neoplasm of uncertain behavior of stomach |
| D372 | Neoplasm of uncertain behavior of small intestine |
| D373 | Neoplasm of uncertain behavior of appendix |
| D374 | Neoplasm of uncertain behavior of colon |
| D375 | Neoplasm of uncertain behavior of rectum |
| D378 | Neoplasm of uncertain behavior of other specified digestive organs |
| D379 | Neoplasm of uncertain behavior of digestive organ, unspecified |
| D3A010 | Benign carcinoid tumor of the duodenum |
| D3A011 | Benign carcinoid tumor of the jejunum |
| D3A012 | Benign carcinoid tumor of the ileum |
| D3A019 | Benign carcinoid tumor of the small intestine, unspecified portion |
| D3A020 | Benign carcinoid tumor of the appendix |
| D3A021 | Benign carcinoid tumor of the cecum |
| D3A022 | Benign carcinoid tumor of the ascending colon |
| D3A023 | Benign carcinoid tumor of the transverse colon |
| D3A024 | Benign carcinoid tumor of the descending colon |
| D3A025 | Benign carcinoid tumor of the sigmoid colon |
| D3A026 | Benign carcinoid tumor of the rectum |
| D3A029 | Benign carcinoid tumor of the large intestine, unspecified portion |
| D3A092 | Benign carcinoid tumor of the stomach |
| D3A094 | Benign carcinoid tumor of the foregut, unspecified |
| D3A095 | Benign carcinoid tumor of the midgut, unspecified |
| D3A096 | Benign carcinoid tumor of the hindgut, unspecified |
| D483 | Neoplasm of uncertain behavior of retroperitoneum |
| D484 | Neoplasm of uncertain behavior of peritoneum |
| D490 | Neoplasm of unspecified behavior of digestive system |
| E164 | Increased secretion of gastrin |
| E730 | Congenital lactase deficiency |
| E731 | Secondary lactase deficiency |
| E738 | Other lactose intolerance |
| E739 | Lactose intolerance, unspecified |
| E7410 | Disorder of fructose metabolism, unspecified |
| E7411 | Essential fructosuria |
| E7412 | Hereditary fructose intolerance |
| E7419 | Other disorders of fructose metabolism |
| E7431 | Sucrase-isomaltase deficiency |
| E7439 | Other disorders of intestinal carbohydrate absorption |
| E8419 | Cystic fibrosis with other intestinal manifestations |
| I774 | Celiac artery compression syndrome |
| I8500 | Esophageal varices without bleeding |
| I8501 | Esophageal varices with bleeding |
| I8510 | Secondary esophageal varices without bleeding |
| I8511 | Secondary esophageal varices with bleeding |
| I880 | Nonspecific mesenteric lymphadenitis |
| K200 | Eosinophilic esophagitis |
| K208 | Other esophagitis |
| K209 | Esophagitis, unspecified |
| K210 | Gastro-esophageal reflux disease with esophagitis |
| K219 | Gastro-esophageal reflux disease without esophagitis |
| K220 | Achalasia of cardia |
| K2210 | Ulcer of esophagus without bleeding |
| K2211 | Ulcer of esophagus with bleeding |
| K222 | Esophageal obstruction |
| K223 | Perforation of esophagus |
| K224 | Dyskinesia of esophagus |
| K225 | Diverticulum of esophagus, acquired |
| K226 | Gastro-esophageal laceration-hemorrhage syndrome |
| K2270 | Barrett's esophagus without dysplasia |
| K22710 | Barrett's esophagus with low grade dysplasia |
| K22711 | Barrett's esophagus with high grade dysplasia |
| K22719 | Barrett's esophagus with dysplasia, unspecified |
| K228 | Other specified diseases of esophagus |
| K229 | Disease of esophagus, unspecified |
| K23 | Disorders of esophagus in diseases classified elsewhere |
| K250 | Acute gastric ulcer with hemorrhage |
| K251 | Acute gastric ulcer with perforation |
| K252 | Acute gastric ulcer with both hemorrhage and perforation |
| K253 | Acute gastric ulcer without hemorrhage or perforation |
| K254 | Chronic or unspecified gastric ulcer with hemorrhage |
| K255 | Chronic or unspecified gastric ulcer with perforation |
| K256 | Chronic or unspecified gastric ulcer with both hemorrhage and perforation |
| K257 | Chronic gastric ulcer without hemorrhage or perforation |
| K259 | Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation |
| K260 | Acute duodenal ulcer with hemorrhage |
| K261 | Acute duodenal ulcer with perforation |
| K262 | Acute duodenal ulcer with both hemorrhage and perforation |
| K263 | Acute duodenal ulcer without hemorrhage or perforation |
| K264 | Chronic or unspecified duodenal ulcer with hemorrhage |
| K265 | Chronic or unspecified duodenal ulcer with perforation |
| K266 | Chronic or unspecified duodenal ulcer with both hemorrhage and perforation |
| K267 | Chronic duodenal ulcer without hemorrhage or perforation |
| K269 | Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation |
| K270 | Acute peptic ulcer, site unspecified, with hemorrhage |
| K271 | Acute peptic ulcer, site unspecified, with perforation |
| K272 | Acute peptic ulcer, site unspecified, with both hemorrhage and perforation |
| K273 | Acute peptic ulcer, site unspecified, without hemorrhage or perforation |
| K274 | Chronic or unspecified peptic ulcer, site unspecified, with hemorrhage |
| K275 | Chronic or unspecified peptic ulcer, site unspecified, with perforation |
| K276 | Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforation |
| K277 | Chronic peptic ulcer, site unspecified, without hemorrhage or perforation |
| K279 | Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforation |
| K280 | Acute gastrojejunal ulcer with hemorrhage |
| K281 | Acute gastrojejunal ulcer with perforation |
| K282 | Acute gastrojejunal ulcer with both hemorrhage and perforation |
| K283 | Acute gastrojejunal ulcer without hemorrhage or perforation |
| K284 | Chronic or unspecified gastrojejunal ulcer with hemorrhage |
| K285 | Chronic or unspecified gastrojejunal ulcer with perforation |
| K286 | Chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforation |
| K287 | Chronic gastrojejunal ulcer without hemorrhage or perforation |
| K289 | Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation |
| K2900 | Acute gastritis without bleeding |
| K2901 | Acute gastritis with bleeding |
| K2920 | Alcoholic gastritis without bleeding |
| K2921 | Alcoholic gastritis with bleeding |
| K2930 | Chronic superficial gastritis without bleeding |
| K2931 | Chronic superficial gastritis with bleeding |
| K2940 | Chronic atrophic gastritis without bleeding |
| K2941 | Chronic atrophic gastritis with bleeding |
| K2950 | Unspecified chronic gastritis without bleeding |
| K2951 | Unspecified chronic gastritis with bleeding |
| K2960 | Other gastritis without bleeding |
| K2961 | Other gastritis with bleeding |
| K2970 | Gastritis, unspecified, without bleeding |
| K2971 | Gastritis, unspecified, with bleeding |
| K2980 | Duodenitis without bleeding |
| K2981 | Duodenitis with bleeding |
| K2990 | Gastroduodenitis, unspecified, without bleeding |
| K2991 | Gastroduodenitis, unspecified, with bleeding |
| K30 | Functional dyspepsia |
| K310 | Acute dilatation of stomach |
| K311 | Adult hypertrophic pyloric stenosis |
| K312 | Hourglass stricture and stenosis of stomach |
| K313 | Pylorospasm, not elsewhere classified |
| K314 | Gastric diverticulum |
| K315 | Obstruction of duodenum |
| K316 | Fistula of stomach and duodenum |
| K317 | Polyp of stomach and duodenum |
| K31811 | Angiodysplasia of stomach and duodenum with bleeding |
| K31819 | Angiodysplasia of stomach and duodenum without bleeding |
| K3182 | Dieulafoy lesion (hemorrhagic) of stomach and duodenum |
| K3183 | Achlorhydria |
| K3184 | Gastroparesis |
| K3189 | Other diseases of stomach and duodenum |
| K319 | Disease of stomach and duodenum, unspecified |
| K3520 | Acute appendicitis with generalized peritonitis, without abscess |
| K3521 | Acute appendicitis with generalized peritonitis, with abscess |
| K3530 | Acute appendicitis with localized peritonitis, without perforation or gangrene |
| K3531 | Acute appendicitis with localized peritonitis and gangrene, without perforation |
| K3532 | Acute appendicitis with perforation and localized peritonitis, without abscess |
| K3533 | Acute appendicitis with perforation and localized peritonitis, with abscess |
| K3580 | Unspecified acute appendicitis |
| K35890 | Other acute appendicitis without perforation or gangrene |
| K35891 | Other acute appendicitis without perforation, with gangrene |
| K36 | Other appendicitis |
| K37 | Unspecified appendicitis |
| K380 | Hyperplasia of appendix |
| K381 | Appendicular concretions |
| K382 | Diverticulum of appendix |
| K383 | Fistula of appendix |
| K388 | Other specified diseases of appendix |
| K389 | Disease of appendix, unspecified |
| K4000 | Bilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent |
| K4001 | Bilateral inguinal hernia, with obstruction, without gangrene, recurrent |
| K4010 | Bilateral inguinal hernia, with gangrene, not specified as recurrent |
| K4011 | Bilateral inguinal hernia, with gangrene, recurrent |
| K4020 | Bilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent |
| K4021 | Bilateral inguinal hernia, without obstruction or gangrene, recurrent |
| K4030 | Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent |
| K4031 | Unilateral inguinal hernia, with obstruction, without gangrene, recurrent |
| K4040 | Unilateral inguinal hernia, with gangrene, not specified as recurrent |
| K4041 | Unilateral inguinal hernia, with gangrene, recurrent |
| K4090 | Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent |
| K4091 | Unilateral inguinal hernia, without obstruction or gangrene, recurrent |
| K4100 | Bilateral femoral hernia, with obstruction, without gangrene, not specified as recurrent |
| K4101 | Bilateral femoral hernia, with obstruction, without gangrene, recurrent |
| K4110 | Bilateral femoral hernia, with gangrene, not specified as recurrent |
| K4111 | Bilateral femoral hernia, with gangrene, recurrent |
| K4120 | Bilateral femoral hernia, without obstruction or gangrene, not specified as recurrent |
| K4121 | Bilateral femoral hernia, without obstruction or gangrene, recurrent |
| K4130 | Unilateral femoral hernia, with obstruction, without gangrene, not specified as recurrent |
| K4131 | Unilateral femoral hernia, with obstruction, without gangrene, recurrent |
| K4140 | Unilateral femoral hernia, with gangrene, not specified as recurrent |
| K4141 | Unilateral femoral hernia, with gangrene, recurrent |
| K4190 | Unilateral femoral hernia, without obstruction or gangrene, not specified as recurrent |
| K4191 | Unilateral femoral hernia, without obstruction or gangrene, recurrent |
| K420 | Umbilical hernia with obstruction, without gangrene |
| K421 | Umbilical hernia with gangrene |
| K429 | Umbilical hernia without obstruction or gangrene |
| K430 | Incisional hernia with obstruction, without gangrene |
| K431 | Incisional hernia with gangrene |
| K432 | Incisional hernia without obstruction or gangrene |
| K433 | Parastomal hernia with obstruction, without gangrene |
| K434 | Parastomal hernia with gangrene |
| K435 | Parastomal hernia without obstruction or gangrene |
| K436 | Other and unspecified ventral hernia with obstruction, without gangrene |
| K437 | Other and unspecified ventral hernia with gangrene |
| K439 | Ventral hernia without obstruction or gangrene |
| K440 | Diaphragmatic hernia with obstruction, without gangrene |
| K441 | Diaphragmatic hernia with gangrene |
| K449 | Diaphragmatic hernia without obstruction or gangrene |
| K450 | Other specified abdominal hernia with obstruction, without gangrene |
| K451 | Other specified abdominal hernia with gangrene |
| K458 | Other specified abdominal hernia without obstruction or gangrene |
| K460 | Unspecified abdominal hernia with obstruction, without gangrene |
| K461 | Unspecified abdominal hernia with gangrene |
| K469 | Unspecified abdominal hernia without obstruction or gangrene |
| K5000 | Crohn's disease of small intestine without complications |
| K50011 | Crohn's disease of small intestine with rectal bleeding |
| K50012 | Crohn's disease of small intestine with intestinal obstruction |
| K50013 | Crohn's disease of small intestine with fistula |
| K50014 | Crohn's disease of small intestine with abscess |
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