Education & Training

Medical School

Akdeniz Universitesi


Internal Medicine

  • University of Istanbul, Turkey



  • The University of Iowa


American Board of Internal Medicine
American Board of Internal Medicine/Gastroenterology


MU Health Care participates with most major managed care organizations. To find out whether MU Health Care is a participating provider in your insurance plan or network, or for information on co-payments and deductibles, please contact your insurance carrier directly.

Academic Information

Associate Professor of Clinical Medicine
Director of Inpatient Gastroenterology Services

Research Interests

  • Gastroesophageal reflux disease (GERD)
  • Gastrointestinal cancer
  • Gastrointestinal disorders
  • Gastrointestinal imaging
  • Inflammatory bowel diseases (IBD)
  • Upper endoscopy an colonoscopy
  • Enteral feeding
  • Hepatitis
  • Hepatology
  • Liver cancer
  • Liver disease

Areas of Expertise

  • General gastroenterology
  • Hepatology
  • Upper endoscopy
  • Colonoscopy
  • Capsule endoscopy
  • Push enteroscopy
  • Feeding tube placement

Awards & Honors

  • 2021 Harvard T.H. Chan School of Public Health Certificate: Leadership Development for Physicians in Academic Health Centers
  • 2021 Fellow, American Society of Gastrointestinal Endoscopy (FASGE)
  • 2020 Certificate of Recognition - In Recognition of Eminent Contributions from Benthem Science Publishers
  • 2018 Nominated for American College of Gastroenterology (ACG) Governor of Missouri    
  • 2018 "Tiger Research Award", University of Missouri Gastroenterology
  • 2018 "An Exceptional Team Member", University of Missouri Health Care
  • 2017 "2016-2017 Quality Improvement Champion", University of Missouri Health Care
  • 2017 Published on the TOP DRAWER section of the Columbia Daily Tribune Newspaper
  • 2017 Professional photo & intro on the cover-page of the World Journal of Hepatology journal
  • 2017 White Tulip Health Foundation, "Academician Award", Newark, NJ
  • 2017 Mentor of American College of Gastroenterology (ACG) on Research Career, Academics, Clinical Career and Education Career.
  • 2016 “Faculty/Staff Advisor” for the University of Missouri Dialogue Club.
  • 2016 Fellow, American College of Gastroenterology (FACG)
  • 2015 White Tulip Health Foundation, “Young Academician Award”. Newark, NJ, USA.
  • 2015 Hepatologist MD of “Show Me ECHO- HCV” Project in Missouri State.
  • 2014 Grant Award for 2014 Fellow Advanced Endoscopy Programs. University of Colorado, Aurora, CO, USA.
  • 2006, 2007 and 2008: Turkish Nominee of ASNEMGE: European Rising Star in Gastroenterology.
  • 2009 Hepatogastroentrology Congress 'Poster Award'. Antalya, Turkey.
  • 2009 AASLD 'Presidential Poster of Distinction'. Boston, USA.
  • 2008 Istanbul Governor’s Science Award.
  • 2007 National Gastroenterology Week – Danone institution Oral Presentation Award. Nevşehir, Turkey.
  • 2006 Novartis: “Patient Relative Studies’ First Prize. İstanbul, Turkey.
  • 2006 EASL Best Abstracts/Registration Award. Vienna, Austria.
  • 2005 Full Bursary Award EASL 2005 Rosiglitazone Shows. Paris, France.
  • 2005 Presidential poster and poster of distinction. Montreal, Quebec, Canada.
  • 2005 Roche Viral Hepatitis Oral Presentation Second Prize. Swissotel, İstanbul.
  • 2004 'ODTU’ Dr. Mustafa Parlar Foundation Study Support Prize. Orta Dogu Teknik University, Ankara, Turkey.
  • 2004 National Gastrenterology Week – Oral presentation award. Antalya, Turkey.
  • 2003, 2004, 2005, 2006 - Marmara University International Study Awards. Istanbul, Turkey.
  • 2003 National Gastrenterology Week – Oral presentation award. Kuşadasi, Turkey.
  • 2003 Young Scientists-Clinicans Program Full Bursary Award. Cairo, Egypt.
  • 2001 Istanbul University International Study Award. Istanbul, Turkey.
  • 1999 ECCMID Young Investigator Award. Berlin, Germany

Professional Memberships and Activities

  • 2021-present: FASGE: Fellow of the American Society of Gastrointestinal Endoscopy (FASGE)
  • 2017-present: FACP: Fellow of the American College of Physicians
  • 2017-present: ACG-Mentor: American College of Gastroenterology Mentor on Academics, Research Career, Clinical Career, Education Career, and General Mentoring Advice
  • 2017-present: American Gastroenterology Association (AGA)
  • 2017-present: FACG: Fellow of the American College of Gastroenterology
  • 2016-2018: University of Missouri Dialogue Club Faculty/Staff Advisor
  • 2016-present: American Society of Gastrointestinal Endoscopy (ASGE)
  • 2009-present: American Association for Study of the Liver Diseases (AASLD)
  • 2008-present: FESBGH: Fellow of the European Section and Board of Gastroenterology & Hepatology
  • 2006-present: Association of National European and Mediterranean Societies of Gastroenterology
  • 2001-present: Turkish Society of Gastroenterology
  • 2001-present: Turkish Society of Liver Diseases

Book co-editor

  • Book Title: Viral Hepatitis: Chronic Hepatitis B. Editors: Resat Ozaras, Veysel Tahan (Eds.) © 2018 Springer Nature Switzerland AG. Springer is part of Springer Nature. Switzerland. ISBN 978-3-319-93449-5.
  • Book Title: Internal Medicine: Topics on Exams and Rotations. Editors: Zakaver Odabasi, Veysel Tahan (Eds.) © 2016 Tumer Publishing, Istanbul, Turkey. ISBN: 975-6416-04-1. 

Editorial Board Appointments in Medical Journals

  • 2020-present: Diseases Journal- Switzerland
  • 2018-present: World Journal of Gastroenterology
  • 2018-present: World Journal of Gastrointestinal Oncology 
  • 2018-present: World Journal of Gastrointestinal Pathophysiology
  • 2018-present: World Journal of Stem Cells
  • 2016-present: International Journal of Gastroenterology Disorders & Therapy
  • 2016-present: Journal of Digestive Diseases and Hepatology
  • Journal of Gastroenterology, Liver & Pancreatic Diseases
  • 2016-present: HSOA Journal of Gastroenterology & Hepatology Research
  • 2016-present: Journal of Medical Discovery
  • 2016-present: Journal of Scientific Discovery
  • 2016-present: BAOJ Medical and Nursing
  • 2016-present: Journal of Endocrinology and Diabetes Mellitus (Synergy Publishers)
  • 2015-present: Journal of Gastroenterology, Hepatology and Endoscopy
  • 2014-present: Frontiers in Medicine (Lausanne) – Gastroenterology
  • 2012-present: Endoscopy Gastrointestinal – TGV
  • 2009-present: Abant Medical Journal
  • 2009-present: Turkish Journal of Medical Sciences

Former Editorial Board activities in Medical Journals

  • 2019-2020: Artificial intelligence in Gastroenterology
  • 2017-2019: Annals of Hepatology
  • 2014-2017: Turkish Journal of Gastroenterology- Former Associate Editor
  • 2014-2018: World Journal of Hepatology- Former Editorial Board Member


Book Chapters

  • Updated hepatitis C treatment per recent international guidelines. Authors: Neal Sharma, Muhammad Mubarak, Omer Basar, Ebubekir Daglilar, Veysel Tahan. Book Title: Viral Hepatitis. Editor Resat Ozaras, Cambridge Scholars Publishing, Cambridge, UK, 2021 (Accepted-In print).
  • Non-Alcoholic Fatty Pancreatic Disease (NAFPD).
    Authors: Alhareth Al Juboori, Harleen Chela, Sami Samiullah, Veysel Tahan.
    Book Title: Obesity and Diabetes: New Surgical and Nonsurgical Approaches. Editors: Faintuch, Joel, Faintuch, Salomão (Eds.). Chapter 25; pages 335- 345; 2020 Springer Nature Switzerland AG. Springer is part of Springer Nature.
  • Management of Interferon-Free Direct-Acting HCV Antiviral Therapy Failure.
    Authors: Tran KD, Albarrak AA, Tahan V.
    Book Title: Chronic HCV. Editors: Resat Ozaras (Eds.) 2019 Springer Nature Switzerland AG. Springer is part of Springer Nature. ISBN 978-3-030-03757-4. April 7, 2019.
  • Current Therapy of Chronic Hepatitis C Virus in Treatment Naive Patients. 
    Authors: Juboori AA, Satinder Kaur, Tahan V.
    Book Title: Chronic HCV.  Editors: Resat Ozaras (Eds.) 2019 Springer Nature Switzerland AG. Springer is part of Springer Nature. ISBN 978-3-030-03757-4. April 7, 2019.
  • Acute Hepatitis: Acute Hepatitis A. 
    Authors: Turse EP, Rossow B, Tahan V.
    Book Title: Viral Hepatitis. Springer, Editors: Resat Ozaras (Eds.) © 2019 Springer Nature Switzerland AG. Springer is part of Springer Nature. ISBN 978-3-030-03535-8. March 6, 2019.
  • Natural History of Hepatitis B Virus.
    Authors: Heath RD, Tahan V.
    Book Title: Viral Hepatitis: Chronic Hepatitis B. Editors: Resat Ozaras, Veysel Tahan (Eds.) © 2018 Springer Nature Switzerland AG. Springer is part of Springer Nature. Pages: 1-10. ISBN 978-3-319-93449-5. September 2018.
  • Hepatitis D Virus Infection: Role of Hepatitis B and the Current Updates on Management.
    Authors: Albarrak AA, Tran KD, Tahan V.
    Book Title: Viral Hepatitis: Chronic Hepatitis B. Editors: Resat Ozaras, Veysel Tahan (Eds.) © 2018 Springer Nature Switzerland AG. Springer is part of Springer Nature. Pages: 95-103. ISBN 978-3-319-93449-5. September 2018.

Published articles in National/International Medical Journals (2018-present)

  • Basar O, Dailey F, Dailey E, Tahan V, Daglilar E.
    Interferon-induced Crohn’s disease: An unusual side effect of interferon therapy in a patient with chronic hepatitis C virus infection.
    Cureus 2021; 13(6):e15568.
  • Mikhael M, Tahan V, Daglilar E.
    Duodenal Dieulafoy’s lesion.
    Am J Hosp Med 2021; 5(2): 2021.
  • Mansour MM, Smith ZD, Ghouri Y, Tahan V.
    Ulcerative colitis with concomitant serrated polyposis syndrome: A case report and literature review.
    Cureus 2021; 13(4):e14591.
  • Naseer M, Hadi S, Syed A, Safdari A, Tahan V,
    Exosomes: A new frontier under the spotlight for diagnosis and treatment of gastrointestinal diseases.
    World J Meta-Anal 2021; 9(1): 12 28.
  • Tarar Z, Tahan V, Yin F, Daglilar E.
    An Unusual Case of Esophageal Hyperplastic Polyp with Scleroderma: A Case Report and Review of the Literature.
    Cureus 2021; 13(1): e12500. doi:10.7759/cureus.12500.
  • Chela HK, Tahan V, Daglilar E.
    Do not hammer a wrench: remove endoscopically.
    Radiol Case Rep. 2020; 16(1):219. doi: 10.1016/j.radcr.2020.10.036.
  • Parsa N, Grisham EA, Cockerell CJ, Matteson-Kome ML, Bysani RV, Samiullah S, Nguyen DL,  Tahan V, Ghouri YA, Puli SR, Bechtold ML.
    Split-dose vs same-day bowel preparation for afternoon colonoscopies: A meta-analysis of randomized controlled trials.
    World J Meta-Anal 2020; 8(6): 0-0 DOI: 10.13105/wjma.v8.i6.0000
  • Daglilar E, Connolly SE, Tahan V, Cohen A, Therapondos G.
    The Utilization and Diagnostic Yield of Upper Endoscopy for Evaluation of Gastrointestinal Symptoms Within the First Year After Liver Transplantation.
    Cureus. 2020: 12(11):e11323. doi: 10.7759/cureus.11323. PMID: 33282596; PMCID: PMC7717078.
  • Akin H, Kurt R, Tufan F, Swi A, Ozaras R, Tahan V, Hammoud G.
    Newly Reported Studies on the Increase in Gastrointestinal Symptom Prevalence with COVID-19 Infection: A Comprehensive Systematic Review and Meta-Analysis.
    Diseases. 2020;8(4):41. doi: 10.3390/diseases8040041, This article has been the most extensive metaanalysis and systematic review on COVID-19 related GI symptoms in the literature.
  • Chela HK, Pasha SB, Basar O, Daglilar E, Tahan V.
    Liver in the limelight in the corona (COVID-19) time.
    World J Clin Cases. 2020;8(16):3405-3410. We reviewed COVID-19 related liver findings.
  • Naseer M, Poola S, Dailey FE, Akin H, Tahan V.
    Implications of COVID-19 for inflammatory bowel disease: Opportunities and challenges amidst the pandemic.
    World J Meta-Anal. Oct 28, 2020; 8(5): 383-399.IBD and COVID-19 interferance was discussed.
  • Ghouri YA, Tahan V, Shen B.
    Secondary causes of inflammatory bowel disease.
    W. J Gastroenterol. 2020; 26(28):3998-4017.
  • Ali S, Tahan V, Abdel Jalil A.
    Earl buried bumper syndrome: A rare complication of percutaneous endoscopic gastrostomy tube placement.
    Cureus. 2020;12: e9177.
  • Chela H, Romana BS, Madabattula M, Albarrak AA, Yousef MH, Samiullah S, Tahan V.
    Stem cell therapy: a potential for the perils of pancreatitis.
    Turk J Gastroenterol 2020; 31;414-24. .
  • Abu Khalaf S. Albarrak A, Yousef M, Tahan V.
    Immune checkpoint inhibitors induced colitis, stay vigilant: A case report.
    W J Gastrointestinal Oncol 2020; 12:699-704. 
  • Naseer M, Poola S, Ali S, Samiullah S, Tahan V.
    Prebiotics and Probiotics in Inflammatory Bowel Disease (IBD): Where Are We Now And Where Are We Going?
    Curr Clin Pharmacol. 2020;15(3):216-233. 
  • Naseer M, Poola S, Uraz S, Tahan V.
    Therapeutic Effects of Prebiotics in Constipation: A Review.
    Curr Clin Pharmacol. 2020;15(3):207-215. 
  • Tahan V, Tran K, Yousef MA, Dailey FE, Uraz S.
    Correction: An unusual finding of a ladybug on screening colonoscopy.
    ACG Case Rep J 2019; 6:270.
  • Tahan V, Tran K, Yousef MA, Dailey FE, Uraz S.
    An unusual finding of a ladybug on screening colonoscopy.
    ACG Case Rep J 2019; 6:1.
  • Jalil AA, Gorski R, Abdel Jalil SA, Cronin R, Comianos M, Mann M, Rajagopalan H, Jalil AA, Tahan V.
    Factors associated with diverticular bleeding and re-bleeding: A United States hospital study.
    North Clin Istanb 2019; 6(3):248-253.
  • Dailey FE, Turse EP, Daglilar E, Tahan V.
    The dirty aspects of fecal microbiota transplantation: a review of its adverse effects and complications.
    Current Opinion in Pharmacology 2019;49:29-33.  (Elsevier J. IF: 6.313).
  • Turse EP, Dailey FE, Ghouri Y, Tahan V.
    Fecal microbiota transplantation donation: the gift that keeps on giving.  
    Current Opinion in Pharmacology 2019;49:24-28. (Elsevier J. IF: 6.313).
  • Albarrak AA, Romana BS, Uraz S, Yousef MH, Juboori AA, Tahan V.
    Clostridium difficile infection in inflammatory bowel disease patients.
    Endocr Metab Immune Disord Drug Targets. 2019;19(7):929-935.
  • Dailey FE, Turse EP, Rossow B, Kuwajima VK, Tahan V.
    Probiotics for gastrointestinal and liver diseases: an updated review of the published literature.
    Endocr Metab Immune Disord Drug Targets 2019;19(5):549-570.
  • Naseer M, Turse EP, Syed A, Dailey FE, Zatreh M, Tahan V. 
    Interventions to improve sarcopenia in cirrhosis: A systematic review. 
    World J Clin Cases 2019; 7(2): 156-170. (This systematic review is the most up-to-date paper underlining the importance of sarcopenia in cirrhosis by my mentorship with the current MU GI Team).  
  • Rao SC, Sathyamurty A, Turse EP, Dailey FE, Tahan V.
    Extra-thoracic Extrinsic Compression: An Unusual Cause of Dysphagia.
    Endocr Metab Immune Disord Drug Targets. Endocr Metab Immune Disord Drug Targets. 2019;19:230-231. 
  • Heath RD, Parsa N, Matteson-Kome ML, Buescher V, Samiullah S, Nguyen DL, Tahan V, Ghouri YA, Puli SR, Bechtold ML.
    Use of music during colonoscopy: An updated meta-analysis of randomized controlled trials.
    World J Meta-Anal 2019; 7: 428-435.
  • Turse EP, Dailey FE, Naseer M, Partyka EK, Bragg JD, Tahan V.
    Stem cells for luminal, fistulizing, and perianal inflammatory bowel disease: a comprehensive updated review of the literature.
    Stem Cells Cloning 2018;11:95-113.
  • Romana BS, Albarrak AA, Yousef MH, Tahan V.
    Infliximab use in ulcerative colitis flare with Clostridium difficile infection: A report of two cases and literature review.
    North Clin Istanb 2018; 5(3): 256-260.
  • Turse EP, Dailey FE, Naseer M, Partyka EK, Tahan V.
    One more chance of fistula healing in IBD: Stem cell therapy.
    World J Clin Cases 2018:6(12):493-500.
  • Dailey FE, Turse EP, Naseer M, Bragg JD, Tahan V.
    Review of stem cells as promising therapy for perianal disease in inflammatory bowel disease.
    World J Transplant 2018;8(4):97-101.
  • Romana B, Chela H, Dailey F, Nassir F, Tahan V.
    Non-alcoholic fatty pancreas disease (NAFPD): A silent spectator or the fifth component of metabolic syndrome?
    A literature review. Endocr Metab Immune Disord Drug Targets. 2018;18(6):547-554.
  • Naseer M, Daily F, Al Juboori AH, Samiullah S, Tahan V.
    Epidemiology, determinants, and management of AIDS cholangiopathy: A review.
    Worl J Gastroenterol 2018;24(7):767-774.
  • Heath RD, Ibdah JA, Tahan V.
    Fecal Microbiota Transplantation and Its Potential Therapeutic Uses in Gastrointestinal Disorders.
    North Clin Istanb 2018;5(1):79-88.
  • Mir FA, Al Juboori A, Bragg JD, Tahan V.
    Autoimmune hemolytic anemia associated with infliximab use in ulcerative colitis. 
    North Clin Istanb 2018;5(1):64-66.
Download All Publications Download