TEL: 503-297-8081
FAX: 503-292-6601

“My care and treatment philosophy is that the needs of the patient come first. I see the patient as a whole, and part of a larger community when you take care of them.”

Dr. Crespo is board certified internal medicine and a gastroenterology physician. He is also fluent in Spanish. Dr. Crespo was born in Puerto Rico. Dr. Crespo moved from Europe to Alaska and has traveled all across the world. Dr. Crespo believes these experiences have helped him become a grounded person and helps him understand the differences that each person may encounter throughout their lives. Dr. Crespo came to Portland, OR and attended the University of Portland knowing he wanted to become a doctor. He immediately fell in love with the city and was fortunate enough to be involved in an exciting new basic science research for two years prior to enrolling in medical school. Dr. Crespo joined The Oregon Clinic in 2015 after spending four and a half years helping build and establish a successful Gastroenterology practice for the Adventist Medical System.

Dr. Crespo enjoys spending the majority of his free time with his two wonderful children and wife. He enjoys coaching his children’s soccer teams, traveling, skiing, and exploring the great outdoors here in Oregon. 

Other Activities

American Society for Gastrointestinal Endoscopy

American Gastroenterological Association

American College of Gastroenterology


Fellowship, Gastroenterology, Mayo Clinic Florida, Jacksonville, FL 2011

Internship and Residency, Internal Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, 2008

MD, Oregon Health & Science University, Portland, OR, 2005

BS, Biology, University of Portland, Portland OR, 1999



Internal Medicine


Polarization gating spectroscopy of normal-appearing duodenal mucosa to detect pancreatic cancer. Patel M, Gomes A, Ruderman S, Hardee D, Crespo S, Raimondo M, Woodward T, Backman V, Roy H, Wallace M. Gastrointest Endosc. 2014, May 23.

Non-invasive assessment of liver fibrosis using magnetic resonance elastography in liver transplant recipients with hepatitis C. Crespo S, Bridges M, Nakhleh R, McPhail A, Pungpapong S, Keaveny AP. Clin Transplant. 2013 Sep-Oct;27(5):652-8

SW de Melo Jr, Panjala C, Crespo S, Diehl NN, Woodward TA, Raimondo M, Wallace MB.Interobserver Agreement on the Endosonographic Features of Lymph Nodes in Aerodigestive Malignancies. Dig Dis Sci. May 2011

Sergio Crespo & Massimo Raimondo. The long term use of covered metal stents in managing malignant biliary obstruction. Are we changing outcomes? Digestive and Liver Disease. Nov 2010.

Sergio M. Crespo, Ramesh C. Ramanathan, Shih-Fan Kuan, Robert E. Schoen. Gastric polyposis in familial juvenile polyposis, Gastrointest Endo. 2007. 66(4): 821-822

Fasanella, Kenneth, Sergio Crespo, Klause Bielefeldt. Sensations in the GI Tract: Overview of Physiology, Pathophysiology and Treatment. Practical Gastroenterology. 2007, 31 (1): 20-36

Planck SR, Becker MD, Crespo S, Choi D, Galster K, Garman KL, Nobiling R, Rosenbaum JT. Characterizing extravascular neutrophil migration in vivo in the iris. Inflammation. 2008 Apr;31(2):105-11

Matthias D. Becker, S.R. Planck, Sergio Crespo, K. Garman, R.J. Fleischman, P. Dullforce, G.W. Seitz, T.M. Martin, D.C. Parker, and J.T. Rosenbaum. Immunohistology of Antigen-Presenting Cells In Vivo: A Novel Method for Serial Observation of Fluorescently Labeled Cells. Invest Ophthalmol Vis Sci 2003; 44: 2004-9.

PA. Dullforce, K.L. Garman, G.W. Seitz, R.J. Fleischmann, S.M. Crespo, S.R. Planck, D.C. Parker, and J.T. Rosenbaum. APCs in the Anterior Uveal Tract Do Not Migrate to Draining Lymph Nodes. Journal of Immunology. 2004, 172: 6701–8.

PA Dullforce, GW. Seitz, K. L. Garman, J.A. Michael, S.M. Crespo, R.J. Fleischmann, S.R. Planck, D. C. Parker, JT. Rosenbaum. Antigen-Specific Accumulation of Naïve, Memory and Effector CD4 T Cells during Anterior Uveitis Monitored by Intravital Microscopy. Cell Immunol. 2006; 239(1):49-60