Keck School Faculty

Andrew F. Ippoliti, MD
Andrew F. Ippoliti, MD
Professor of Clinical Medicine
IRD 709 2020 Zonal Avenue Health Sciences Campus Los Angeles
Dr. Ippoliti has extensive experience in gastroenterology and is a well-known expert both nationally and locally. He previously was on the faculty at the David Geffen School of Medicine at UCLA where he rose to a professor in clinical medicine. Later he joined the faculty at Cedars-Sinai Medical Center and was the associate chief of gastroenterology for over a decade. He has now moved to the Keck Medicine of USC in the same capacity.

He has been involved in the training of many of the gastroenterologists practicing in the Los Angeles area and sees many second opinion consultations from them. He is known nationally as a key thought leader in inflammatory bowel disease and in gastroesophageal reflux disease. He has served on many advisory boards and has lectured at medical centers around the country and abroad.

Colonic Phenotypes Are Associated with Poorer Response to Anti-TNF Therapies in Patients with IBD Inflamm Bowel Dis. 2017 08; 23(8):1382-1393. . View in PubMed

Outcomes with Anti-Tumour Necrosis Factor-Alpha Therapy and Serology in Patients with Denovo Crohn's Disease After Ileal Pouch Anal Anastomosis J Crohns Colitis. 2017 Jan; 11(1):77-83. . View in PubMed

Microgeographic Proteomic Networks of the Human Colonic Mucosa and Their Association With Inflammatory Bowel Disease Cell Mol Gastroenterol Hepatol. 2016 Sep; 2(5):567-583. . View in PubMed

Perianal Crohn's Disease is Associated with Distal Colonic Disease, Stricturing Disease Behavior, IBD-Associated Serologies and Genetic Variation in the JAK-STAT Pathway Inflamm Bowel Dis. 2016 Apr; 22(4):862-9. . View in PubMed

Nonbloody Diarrhea but Not Significant Weight Loss at Diagnosis Is Associated with the Development of Denovo Crohn's Disease After Ileal Pouch-anal Anastomosis for Ulcerative Colitis Inflamm Bowel Dis. 2016 Mar; 22(3):654-61. . View in PubMed

Colectomy with Permanent End Ileostomy Is More Cost-Effective than Ileal Pouch-Anal Anastomosis for Crohn's Colitis Dig Dis Sci. 2016 Feb; 61(2):550-9. . View in PubMed

Ocular Manifestations in Inflammatory Bowel Disease Are Associated with Other Extra-intestinal Manifestations, Gender, and Genes Implicated in Other Immune-related Traits J Crohns Colitis. 2016 Jan; 10(1):43-9. . View in PubMed

Italian Percutaneous EVAR (IPER) Registry: outcomes of 2381 percutaneous femoral access sites' closure for aortic stent-graft J Cardiovasc Surg (Torino). 2015 Dec; 56(6):889-98. . View in PubMed

Combined Immunosuppression Impairs Immunogenicity to Tetanus and Pertussis Vaccination Among Patients with Inflammatory Bowel Disease Inflamm Bowel Dis. 2015 Aug; 21(8):1754-60. . View in PubMed

The impact of preoperative serum anti-TNFa therapy levels on early postoperative outcomes in inflammatory bowel disease surgery Ann Surg. 2015 Mar; 261(3):487-96. . View in PubMed

Pyoderma Gangrenosum among Patients with Inflammatory Bowel Disease: A Descriptive Cohort Study J Cutan Med Surg. 2015 Mar-Apr; 19(2):125-31. . View in PubMed

Long-term outcomes of thalidomide in refractory Crohn's disease Aliment Pharmacol Ther. 2015 Mar; 41(5):429-37. . View in PubMed

Pyoderma Gangrenosum among Patients with Inflammatory Bowel Disease: A Descriptive Cohort Study J Cutan Med Surg. 2014 Oct; 18(5):361. . View in PubMed

Antibiotics for Treatment of Clostridium difficile Infection in Hospitalized Patients with Inflammatory Bowel Disease Antimicrob Agents Chemother. 2014 Sep; 58(9):5054-9. . View in PubMed

Clinical, serologic, and genetic factors associated with pyoderma gangrenosum and erythema nodosum in inflammatory bowel disease patients Inflamm Bowel Dis. 2014 Mar; 20(3):525-33. . View in PubMed

Multidimensional prognostic risk assessment identifies association between IL12B variation and surgery in Crohn's disease Inflamm Bowel Dis. 2013 Jul; 19(8):1662-70. . View in PubMed

Assessing health status in inflammatory bowel disease using a novel single-item numeric rating scale Dig Dis Sci. 2013 May; 58(5):1313-21. . View in PubMed

A modular organization of the human intestinal mucosal microbiota and its association with inflammatory bowel disease PLoS One. 2013; 8(11):e80702. . View in PubMed

Surgical outcome of ileal pouch-anal anastomosis when used intentionally for well-defined Crohn's disease Inflamm Bowel Dis. 2013 Jan; 19(1):30-6. . View in PubMed

Colorectal cancer screening and surveillance in Crohn's colitis J Crohns Colitis. 2012 Sep; 6(8):824-9. . View in PubMed

Does preoperative immunosuppression influence unplanned hospital readmission after surgery in patients with Crohn's disease? Dis Colon Rectum. 2012 May; 55(5):563-8.. View in PubMed

Host-microbe relationships in inflammatory bowel disease detected by bacterial and metaproteomic analysis of the mucosal-luminal interface Inflamm Bowel Dis. 2012 Mar; 18(3):409-17. . View in PubMed

Variants in ZNF365 isoform D are associated with Crohn's disease Gut. 2011 Aug; 60(8):1060-7. . View in PubMed

A metaproteomic approach to study human-microbial ecosystems at the mucosal luminal interface PLoS One. 2011; 6(11):e26542. . View in PubMed

Genetic predictors of medically refractory ulcerative colitis Inflamm Bowel Dis. 2010 Nov; 16(11):1830-40. . View in PubMed

Combination of innate and adaptive immune alterations increased the likelihood of fibrostenosis in Crohn's disease Inflamm Bowel Dis. 2010 Aug; 16(8):1279-85. . View in PubMed

Capsule endoscopy in patients with Crohn's disease: diagnostic yield and safety Gastrointest Endosc. 2010 Jan; 71(1):121-7. . View in PubMed

Immunosuppression impairs response to pneumococcal polysaccharide vaccination in patients with inflammatory bowel disease Am J Gastroenterol. 2010 Jan; 105(1):148-54. . View in PubMed

New clinical method for distinguishing D-IBS from other gastrointestinal conditions causing diarrhea: the LA/IBS diagnostic strategy Dig Dis Sci. 2010 Jan; 55(1):145-9. . View in PubMed

A prospective evaluation of the long-term outcome of ileal pouch-anal anastomosis in patients with inflammatory bowel disease-unclassified and indeterminate colitis Dis Colon Rectum. 2009 May; 52(5):872-8. . View in PubMed

Esophageal perforation from a metal screw and plate Gastrointest Endosc. 2009 Apr; 69(4):948; discussion 948-9. . View in PubMed

High-frequency haplotypes in the X chromosome locus TLR8 are associated with both CD and UC in females Inflamm Bowel Dis. 2009 Mar; 15(3):321-7. . View in PubMed

Ulcerative colitis-risk loci on chromosomes 1p36 and 12q15 found by genome-wide association study Nat Genet. 2009 Feb; 41(2):216-20. . View in PubMed

Linkage of Crohn's disease-related serological phenotypes: NFKB1 haplotypes are associated with anti-CBir1 and ASCA, and show reduced NF-kappaB activation Gut. 2009 Jan; 58(1):60-7. . View in PubMed

IL23R haplotypes provide a large population attributable risk for Crohn's disease Inflamm Bowel Dis. 2008 Sep; 14(9):1185-91. . View in PubMed

Both preoperative perinuclear antineutrophil cytoplasmic antibody and anti-CBir1 expression in ulcerative colitis patients influence pouchitis development after ileal pouch-anal anastomosis Clin Gastroenterol Hepatol. 2008 May; 6(5):561-8. . View in PubMed

Diagnostic yield of capsule endoscopy in ulcerative colitis and inflammatory bowel disease of unclassified type (IBDU) Endoscopy. 2008 Jan; 40(1):30-5. . View in PubMed

Family history and serology predict Crohn's disease after ileal pouch-anal anastomosis for ulcerative colitis Dis Colon Rectum. 2008 Jan; 51(1):100-8. . View in PubMed

Does infliximab influence surgical morbidity of ileal pouch-anal anastomosis in patients with ulcerative colitis? Dis Colon Rectum. 2007 Nov; 50(11):1747-53.. View in PubMed

Hepatotoxicity of 6-mercaptopurine (6-MP) and Azathioprine (AZA) in adult IBD patients Am J Gastroenterol. 2007 Nov; 102(11):2488-94. . View in PubMed

Mucormycosis presenting as recurrent gastric perforation in a patient with Crohn's disease on glucocorticoid, 6-mercaptopurine, and infliximab therapy Dig Dis Sci. 2007 Sep; 52(9):2078-81. . View in PubMed

A prospective multivariate analysis of clinical factors associated with pouchitis after ileal pouch-anal anastomosis Clin Gastroenterol Hepatol. 2007 Aug; 5(8):952-8; quiz 887. . View in PubMed

Anti-flagellin (CBir1) phenotypic and genetic Crohn's disease associations Inflamm Bowel Dis. 2007 May; 13(5):524-30. . View in PubMed

Genome-wide association study identifies new susceptibility loci for Crohn disease and implicates autophagy in disease pathogenesis Nat Genet. 2007 May; 39(5):596-604. . View in PubMed

Predicting a change in diagnosis from ulcerative colitis to Crohn's disease: a nested, case-control study Clin Gastroenterol Hepatol. 2007 May; 5(5):602-8; quiz 525. . View in PubMed

Open surgery of infrarenal aortic aneurysms with iliac involvement: repair should be entirely intra-abdominal J Cardiovasc Surg (Torino). 2007 Apr; 48(2):187-92. . View in PubMed

NOD2 variants and antibody response to microbial antigens in Crohn's disease patients and their unaffected relatives Gastroenterology. 2007 Feb; 132(2):576-86. . View in PubMed

Antibodies to I2 predict clinical response to fecal diversion in Crohn's disease Inflamm Bowel Dis. 2006 Dec; 12(12):1122-30. . View in PubMed

Patients with inflammatory bowel disease are at risk for vaccine-preventable illnesses Am J Gastroenterol. 2006 Aug; 101(8):1834-40. . View in PubMed

Familial expression of anti-Escherichia coli outer membrane porin C in relatives of patients with Crohn's disease Gastroenterology. 2006 Apr; 130(4):1078-85. . View in PubMed

Elevated platelet count before ileal pouch-anal anastomosis for ulcerative colitis is associated with the development of chronic pouchitis Am Surg. 2005 Oct; 71(10):821-6. . View in PubMed

Randomized trial of argon plasma coagulation vsmultipolar electrocoagulation for ablation of Barrett's esophagus. Gastrointest Endosc. 2005 Feb; 61(2):232-40. . View in PubMed

Safety and efficacy of adalimumab (D2E7) in Crohn's disease patients with an attenuated response to infliximab Am J Gastroenterol. 2005 Jan; 100(1):75-9. . View in PubMed

A pilot study of adalimumab in infliximab-allergic patients Inflamm Bowel Dis. 2004 Jul; 10(4):333-8. . View in PubMed

Popliteal artery aneurysmsFactors associated with thromboembolism and graft failure. Int Angiol. 2004 Mar; 23(1):54-65. . View in PubMed

Effective and safe endoscopic reversal of nondysplastic Barrett's esophagus with thermal electrocoagulation combined with high-dose acid inhibition: a multicenter study Gastrointest Endosc. 2001 May; 53(6):554-8. . View in PubMed

Esophageal biopsy Gastrointest Endosc Clin N Am. 2000 Oct; 10(4):713-22. . View in PubMed

The economic impact of the diagnosis of dysplasia in Barrett's esophagus Am J Gastroenterol. 2000 Oct; 95(10):2946-52. . View in PubMed

J Vasc Surg. 2000 Jan; 31(1 Pt 1):157-63. . View in PubMed

Inflammation of the gastro-oesophageal junction (carditis) in patients with symptomatic gastro-oesophageal reflux disease: a prospective study Gut. 1999 Oct; 45(4):484-8. . View in PubMed

Esophageal motility abnormalities in cirrhotic patients before and after endoscopic variceal treatment Am J Gastroenterol. 1997 Jun; 92(6):941-6. . View in PubMed

The prevalence of colonic neoplasia in patients with Barrett's esophagus: prospective assessment in patients 50-80 years old Am J Gastroenterol. 1997 Apr; 92(4):592-6. . View in PubMed

The diagnosis of Barrett's esophagus: goblets, goblets, goblets Gastrointest Endosc. 1996 Jul; 44(1):91-5. . View in PubMed

Cyclosporine in systemic sclerosisResults of a forty-eight-week open safety study in ten patients. Arthritis Rheum. 1993 Jan; 36(1):75-83. . View in PubMed

Two doses of omeprazole versus placebo in symptomatic erosive esophagitis: the US. Multicenter Study. Gastroenterology. 1992 Jan; 102(1):109-18. . View in PubMed

Intrahepatic cholesterol stones: a rationale for dissolution therapy Gastroenterology. 1991 Jan; 100(1):228-32. . View in PubMed

[Clinico-therapeutic considerations on arterial embolism of the legs] G Chir. 1988 Jun; 9(6):438-42. . View in PubMed

The effect of nicotine on the delay of gastric emptying Aliment Pharmacol Ther. 1988 Apr; 2(2):173-8. . View in PubMed

Esophagitis in sclerodermaPrevalence and risk factors. Gastroenterology. 1987 Feb; 92(2):421-8. . View in PubMed

[The impact of coronary disease in patients with obstructive lesions of the carotid arteries] Cardiologia. 1985 Nov; 30(11):1031-5. . View in PubMed

Objective evaluation of symptomatic alkaline reflux after antrectomy Dig Dis Sci. 1984 Sep; 29(9):824-8. . View in PubMed

Recurrent ulcer after successful treatment with cimetidine or antacid Gastroenterology. 1983 Oct; 85(4):875-80. . View in PubMed

A multicenter placebo-controlled clinical trial of oral metoclopramide in diabetic gastroparesis Diabetes Care. 1983 Sep-Oct; 6(5):463-7. . View in PubMed

Failure of histamine H2-receptor antagonist therapy in Zollinger-Ellison syndrome Am J Surg. 1983 Jan; 145(1):17-23. . View in PubMed

Evidence that gastrin 34 is preferentially released from the human duodenum Gastroenterology. 1982 Jul; 83(1 Pt 2):233-9. . View in PubMed

Endocrine effects of acute and chronic cimetidine administration Dig Dis Sci. 1981 May; 26(5):428-32. . View in PubMed

Effect of oral and intravenous 16,16-dimethyl prostaglandin E2 in duodenal ulcer and Zollinger-Ellison syndrome patients Gastroenterology. 1981 Jan; 80(1):55-9. . View in PubMed

Effect of gastrin heptadecapeptide (G17) on oesophageal contractions in patients with diffuse oesophageal spasm Gut. 1979 Sep; 20(9):756-9. . View in PubMed

Esophageal motility in progressive systemic sclerosis (PSS)Comparison of cine-radiographic and manometric evaluation. Dig Dis Sci. 1979 Aug; 24(8):639-44. . View in PubMed

Effect of one-month treatment with cimetidine on gastric secretion and serum gastrin and pepsinogen levels Gastroenterology. 1978 Feb; 74(2 Pt 2):276-9. . View in PubMed

Cimetidine versus intensive antacid therapy for duodenal ulcer: a multicenter trial Gastroenterology. 1978 Feb; 74(2 Pt 2):393-5. . View in PubMed

Perfusion of the proximal small intestine with peptone stimulates gastric acid secretion in man Gastroenterology. 1977 Oct; 73(4 Pt 1):746-52. . View in PubMed

Detection of a circulating gastric secretagogue in plasma extracts from normogastrinemic patients with acid hypersecretion Gastroenterology. 1976 Dec; 71(6):1114-6. . View in PubMed

The effect of 16,16-dimethyl prostaglandin E2 on meal-stimulated gastric acid secretion and serum gastrin in duodenal ulcer patients Gastroenterology. 1976 Apr; 70(4):488-91. . View in PubMed

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