Top 50 Frequently Used Diagnostic Codes Gastroenterology ICD-9 Code ICD-9 Description ICD-10 Code and Description 211.3 Benign Neo Lg Bowel D12.0 Benign neoplasm of cecum D12.1 Benign neoplasm of appendix D12.6 Benign neoplasm of colon, unspecified K63.5 Polyp of colon 787.91 Diarrhea K52.2 Allergic and dietetic gastroenteritis and colitis K52.89 Other specified noninfective gastroenteritis and colitis R19.7 Diarrhea, unspecified 070.54 Hep C Wo Coma Chronic B18.2 Chronic viral hepatitis C 789.06 Abdom Pain Epigastric R10.13 Epigastric pain 530.81 Esophageal Reflux K21.9 Gastroesophageal reflux disease without esophagitis 280.9 Iron Defic Anemia Unspec D50.9 Iron deficiency anemia, unspecified 535.10 Atrophic Gastritis K29.40 Chronic atrophic gastritis without bleeding K29.50 Unspecified chronic gastritis without bleeding 285.9 Anemia Unspecified D64.9 Anemia, unspecified 564.5 Functional Diarrhea K59.1 Functional diarrhea 555.9 Regional Enteritis Unspec K50.90 Crohn's disease, unspecified, without complications 571.5 Cirrhosis Of Liver Unspec K74.0 Hepatic fibrosis K74.60 Unspecified cirrhosis of liver K74.69 Other cirrhosis of liver 530.11 Reflux Esophagitis K21.0 Gastroesophageal reflux disease with esophagitis 787.99 Ot Digestive Symptoms R19.4 Change in bowel habit R19.8 Oth symptoms and signs involving the dgstv sys and abdomen 790.4 Elev Transaminase/Ldh R74.0 Nonspec elev of levels of transamns & lactic acid dehydrgnse 789.07 Abdom Pain Generalized R10.84 Generalized abdominal pain 787.20 Dysphagia Unspecified R13.0 Aphagia R13.10 Dysphagia, unspecified V76.51 Specl Screen Mal Neo Colon Z12.11 Encounter for screening for malignant neoplasm of colon 558.9 Noninfect Gastroenterit Ot K52.89 Other specified noninfective gastroenteritis and colitis K52.9 Noninfective gastroenteritis and colitis, unspecified 789.00 Abdom Pain Unsp Site R10.9 Unspecified abdominal pain 569.3 Rectal/Anal Hemorrhage K62.5 Hemorrhage of anus and rectum 578.1 Blood In Stool K92.1 Melena ICD-9 Code ICD-9 Description ICD-10 Code and Description 789.01 Abdom Pain R Upper Quad R10.11 Right upper quadrant pain 211.4 Benign Neo Rectum/Anus D12.7 Benign neoplasm of rectosigmoid junction D12.8 Benign neoplasm of rectum D12.9 Benign neoplasm of anus and anal canal 790.6 Abn Blood Chemistry Ot R78.89 Finding of oth substances, not normally found in blood R79.0 Abnormal level of blood mineral R79.89 Other specified abnormal findings of blood chemistry 564.00 Unsp Constipation K59.00 Constipation, unspecified 556.9 Ulcerative Colitis Unspec K51.90 Ulcerative colitis, unspecified, without complications 787.3 Flatulence Eructation/Gas R14.0 Abdominal distension (gaseous) R14.1 Gas pain R14.2 Eructation R14.3 Flatulence 783.21 Loss Of Weight R63.4 Abnormal weight loss 537.89 Gastroduodenal Dis Ot K31.89 Other diseases of stomach and duodenum 530.85 Barrett'S Esophagus K22.70 Barrett's esophagus without dysplasia 787.01 Nausea With Vomiting R11.2 Nausea with vomiting, unspecified 571.8 Chronic Liver Dis Ot K76.0 Fatty (change of) liver, not elsewhere classified K76.89 Other specified diseases of liver 569.0 Anal/Rectal Polyp K62.0 Anal polyp K62.1 Rectal polyp 787.02 Nausea Alone R11.0 Nausea 789.09 Abdom Pain Ot/Multi Site R10.10 Upper abdominal pain, unspecified R10.2 Pelvic and perineal pain R10.30 Lower abdominal pain, unspecified V70.7 Exam Clinical Research Z00.6 Encntr for exam for nrml cmprsn and ctrl in clncl rsrch prog 536.8 Stomach Function Dis Ot K30 Functional dyspepsia V76.2 Screen Mal Neo Cervix Z12.4 Encounter for screening for malignant neoplasm of cervix 535.40 Gastritis Ot K29.60 Other gastritis without bleeding 794.8 Abnl Liver Function Study R94.5 Abnormal results of liver function studies 789.04 Abdom Pain L Lower Quad R10.32 Left lower quadrant pain 793.4 Abnl Findings Gi Tract R93.3 Abnormal findings on dx imaging of prt digestive tract 787.1 Heartburn R12 Heartburn 571.2 Alcohol Cirrhosis Liver K70.30 Alcoholic cirrhosis of liver without ascites 211.1 Benign Neo Stomach D13.1 Benign neoplasm of stomach K31.7 Polyp of stomach and duodenum 792.1 Abnl Find Stool Contents R19.5 Other fecal abnormalities 555.0 Reg Enteritis Sm Intestine K50.00 Crohn's disease of small intestine without complications V12.72 Hx Colon Polyp Z86.010 Personal history of colonic polyps 569.89 Intestinal Disorders Ot K63.4 Enteroptosis K63.89 Other specified diseases of intestine 562.10 Diverticulosis Of Colon K57.30 Dvrtclos of lg int w/o perforation or abscess w/o bleeding The above list is provided for informational purposes only and is not exhaustive or exclusive. CPT codes included are based on PathGroup’s most frequently utilized diagnosis codes per designated medical specialty in 2014. Crosswalk information was compiled from the ICD-10-CM 2015 issued by the Centers for Medicaid and Medicare Services. This list is intended to aid physicians when providing ICD-10 Diagnosis Codes as required by Medicare and other Insurers. Correct coding is the responsibility of the ordering physician. For a full reference, an ICD-10-CM book is recommended. .