CIOR Faculty

P. Ravi Kiran, MBBS, MS, Msc, FRCS, FACS, Director

P. Ravi Kiran, MBBS, MS, Msc, FRCS, FACS, DirectorDr. Kiran brings a wealth of expertise in outcomes studies, having directed the research section of the Department of Surgery at Cleveland Clinic from 2007 to 2013. He looks forward to integrating patient care, research, and quality metrics and to streamlining research workflow relative to databases and infrastructure at CIOR and the Department of Surgery.

Dr. Kiran also serves as Chief of the Division of Colorectal Surgery while overseeing CIOR. He is also Professor of Surgery in Epidemiology at Mailman School of Public Health.



Paul Kurlansky, MD, Associate Director

Paul Kurlansky, MD, Associate DirectorPaul A. Kurlansky, MD is the former Director of Research at the Florida Heart Research Institute in Miami, Florida.  In 2003, he joined the Columbia HeartSource team as the Director of Research, Recruitment and Continuous Quality Improvement, where he was instrumental in guiding every HeartSource affiliate site that has a surgical program. In early 2014 he relocated to New Yorkto accept a dual faculty position at CIOR and as Assistant Professor of Clinical Surgery.

Dr. Kurlansky received his baccalaureate degree (cum laude) from Harvard University and his medical degree from Tufts University Medical School.  He completed his post-graduate training at NewYork-Presbyterian/Columbia University Medical Center inNew York. Dr. Kurlansky is boarded in Surgery, Thoracic surgery and with the American Board of Quality Assurance and Utilization Review. He publishes extensively on cardiac surgery and quality outcomes and is an invited speaker at numerous international forums.

Onur Baser, MS, PhD, Outcomes Researcher

Onur Baser, MS, PhD, Outcomes ResearcherDr. Baser earned his MA (in Economics), MS (in Statistics) and PhD (in Economics) at Michigan State University, East Lansing, MI. After briefly working as Senior Health Economics at Truven Health Analytics, he joined the University of Michigan Medical Center, Ann Arbor, MI as a faculty member in 2006.

Dr. Baser’s research interests includes unwarranted variations in health care as well as comparative effectiveness research. He has consistently worked with government datasets (Medicare, Medicaid, Veterans Affairs, etc.) and commercial datasets (United Health, IMS, Premier, Market Scan, etc.) to minimize selection bias issues related with outcomes research studies using real world datasets. He is currently editor-in-chief for Journal of Health Economics and Outcomes Research.

Selected Publications

  • Baser O. Too much ado about propensity score models? Comparing the methods of propensity score matching. Value Health. 2006;9(6):377-85
  • Wong S, Ji H, Hollenbeck B, Morris A, Baser O, Birkmeyer J. Lymph node counts and hospital survival rates after resection from colon cancer. JAMA. 2007;298(18):2149-54.
  • Baser O, Fan Z, Dimick JB, Staiger D, Birkmeyer JD. Hospital quality and outlier payments for cardiac surgery and hospital quality. Health Affairs. 2009;28(4):1154-60.
  • Dimick JB, Baser O, Staiger DO, Birkmeyer JD. Composite measures for predicting surgical mortality in the hospital. Health Affairs. 2009;28(4):1189-98.
  • Waljee J, Zhong L, Baser O, Fox DA, Chung KC, Yuce H. The incidence of upper and lower extremity surgery for rheumatoid arthritis a national, population-based longitudinal cohort study. J Bone Joint Surg.2015;97(5):403-10.