Hari Nathan

Hari Nathan, MD, PhD

Assistant Professor of Surgery, Division of Hepato-Pancreato-Biliary Surgery


Dr. Hari Nathan is an Assistant Professor of Surgery in the Division of Hepato-Pancreato-Biliary Surgery. Dr. Nathan completed both his undergraduate and medical education with honors at The Johns Hopkins University. He also completed advanced training in health services research and was awarded a PhD from The Johns Hopkins Bloomberg School of Public Health. Dr. Nathan completed his clinical residency training in general surgery at The Johns Hopkins Hospital. He subsequently completed a clinical fellowship in complex general surgical oncology at Memorial Sloan Kettering Cancer Center, where he also served as the Chief Administrative Fellow in Surgery. He joined the faculty of the University of Michigan in 2014. Dr. Nathan's clinical focus includes the multi-disciplinary treatment of tumors of the liver, bile duct, pancreas, and stomach. He has particular interests in the treatment of liver metastases from colorectal cancer as well as primary liver cancer (hepatocellular carcinoma and cholangiocarcinoma).

Dr. Nathan’s health services research portfolio focuses on variation in the cost and quality of surgical care. Specifically, he studies the impact of innovative payment models in the Medicare program on surgical care. He has been awarded a K08 career development award from the Agency for Healthcare Research and Quality to study the impact of accountable care organizations (ACOs) on the costs and quality of surgical care. Additionally, he is a co-investigator on a R01 focused on evaluating the impact of Medicare payment policy innovations on surgical care. He is also interested in the quality of cancer surgery and prediction of prognosis after cancer resection.


Population Health Strategies for Reducing Surgical Costs. K08 HS0247632 (Nathan, PI) 8/01/16 - 7/31/20 - Agency for Healthcare Research and Quality (AHRQ) - This project will assess potential strategies that could be used by Accountable Care Organizations (ACOs) to reduce costs for Medicare patients undergoing inpatient surgery in the United States. It will also evaluate whether ACOs are reducing costs for surgical patients by examining changes in actual Medicare payments over time.

Evaluating policies for improving surgical care in the elderly. R01 AG039434 (Dimick, PI) 9/1/16 – 8/31/21 - National Institute of Aging (NIA) - The specific aims of this project are to evaluate the relative effectiveness of several competing policy options for improving care and reducing costs in surgical patients.

Published Articles or Reviews

Nathan H, Schulick RD, Choti MA, Pawlik TM: Predictors of survival after resection of early hepatocellular carcinoma. Ann Surg 249(5): 799-805, 2009. PM19387322

de Jong MC, Nathan H, Sotiropoulos GC, Paul A, Alexandrescu S, Marques H, Pulitano C, Barroso E, Clary BM, Aldrighetti L, Ferrone CR, Zhu AX, Bauer TW, Walters DM, Gamblin TC, Nguyen KT, Turley R, Popescu I, Hubert C, Meyer S, Schulick RD, Choti MA, Gigot JF, Mentha G, Pawlik TM: Intrahepatic cholangiocarcinoma: An international multi-institutional analysis of prognostic factors and lymph node assessment. J Clin Oncol 29(23): 3140-3145, 2011. PM21730269

Nathan H, Bridges JF, Schulick RD, Cameron AM, Hirose K, Edil BH, Wolfgang CL, Segev DL, Choti MA, Pawlik TM: Understanding surgical decision making in early hepatocellular carcinoma. J Clin Oncol 29(6): 619-625, 2011. PM21205759

Nathan H, Hyder O, Mayo SC, Hirose K, Wolfgang CL, Choti MA, Pawlik TM: Surgical therapy for early hepatocellular carcinoma in the modern era: A 10-year SEER-Medicare analysis Ann Surg 258(6): 1022- 1027, 2013. PM23299519

Nathan H, Atoria CL, Bach PB, Elkin EB: Hospital volume, complications, and cost of cancer surgery in the elderly. J Clin Oncol 33(1): 107-114, 2015. PM25422483

Nathan H, Dimick JB: Opportunities for surgical leadership in managing population health costs. Ann Surg 264(6): 909-910, 2016. PM27832034

Pradarelli JC, Healy MA, Osborne NH, Ghaferi AA, Dimick JB, Nathan H: Variation in medicare expenditures for treating perioperative complications: The cost of rescue. JAMA Surg 151(12): e163340, 2016. PM27706473

Nathan H, Dimick JB: Medicare's shift to mandatory alternative payment models: Why surgeons should care. JAMA Surg 1522(2): 125-126, 2017. PM27893025

Nathan H, Yin H, Wong SL: Postoperative complications and long-term survival after complex cancer resection. Ann Surg Oncol 24(3): 638-644, 2017. PM27619939

Ibrahim AM, Nathan H, Thumma JR, Dimick JB: Impact of the hospital readmission reduction program on surgical readmissions among Medicare beneficiaries. Ann Surg 266(4): 617-624, 2017. PM28657948

Shubeck SP, Thumma JR, Dimick JB, Nathan H: Hospital quality, patient risk, and Medicare expenditures for cancer surgery. Cancer 124(4): 826-832, 2018. PM29149478

Nathan H, Thumma JR, Norton EC, Dimick JB: Strategies for reducing population surgical costs in Medicare: Local referrals to low-cost hospitals. Ann Surg 267(5): 878-885, 2018. PM28817444

Shubeck SP, Thumma JR, Dimick JB, Nathan H: Hot spotting as a strategy to identify high-cost surgical populations. Ann Surg Epub ahead of print: doi: 10.1097/SLA.0000000000002663, 2018. PM29342019