Board-certified general surgeon and abdominal transplant specialist with advanced fellowship training in liver and kidney transplantation. Current Attending Transplant Surgeon and Assistant Professor of Surgery at New York Medical College, with leadership roles in transplant quality, fellowship education, and research oversight. Nationally and internationally recognized for contributions to liver transplant outcomes research, organ utilization strategies, and machine perfusion technologies.
Education
- Fellowship, Abdominal Transplant Surgery, UT Southwestern Medical Center
 - Residency, General Surgery, Westchester Medical Center
 - Residency, Tokyo Bay Urayasu Ichikawa Medical Center
 - M.D., Kyushu University
 
Areas of Expertise
- Liver Transplant Outcomes Research
 - Organ Utilization Strategies
 - Machine Perfusion Technologies
 
Honors and Awards
- 2025: Care Champion Award – Westchester Medical Center
 - 2023: Liver Transplant/HPB Surgery Fellow Award – AASLD
 - 2022 & 2023: Young Investigator Awards – American Transplant Congress
 - 2022 & 2023: Best in Congress Poster – American Transplant Congress
 - 2021 & 2022: Early Career Investigator Awards – AASLD
 
Publications
- K Okumura, S Gogna, M Gachabayov, DM Felsenreich, M McGuirk, .... "Gallbladder cancer: Historical treatment and new management options." World Journal of Gastrointestinal Oncology 13 (10), 1317, 2021
 - K Okumura, F Shoji, M Yoshida, A Mizuta, I Makino, H Higashi. "Severe sepsis caused by Aeromonas hydrophila in a patient using tocilizumab: a case report." Journal of Medical Case Reports 5 (1), 499, 2011
 - A Dhand, K Okumura, C Nabors, S Nishida. "Solid organ transplantation from COVID positive donors in the United States: analysis of United Network for Organ Sharing database." Transplant Infectious Disease 25 (1), e13925, 2023
 - K Okumura, S Yamanaga, K Tanaka, K Kinoshita, A Kaba, M Fujii, .... "Prediction model of compensation for contralateral kidney after living-donor donation." BMC nephrology 20 (1), 283, 2019
 - H Katagiri, K Okumura, J Machi. "Internal hernia due to mesenteric defect." Journal of Surgical Case Reports 2013 (5), rjt037, 2013
 - K Okumura, K Sugimachi, N Kinjo, F Shoji, M Ikebe, I Makino, H Higashi. "Risk factors of bile leakage after hepatectomy for hepatocellular carcinoma.." Hepato-gastroenterology 60 (127), 1717-1719, 2013
 - J Kimura, K Okumura, H Katagiri, AK Lefor, K Mizokami, T Kubota. "Idiopathic omental hemorrhage: a case report and review of the literature." International journal of surgery case reports 28, 214-218, 2016
 
Memberships and Affiliations
- American Society of Transplant Surgeons
 - American Association for the Study of Liver Diseases
 - American College of Surgeons
 - The Transplantation Society
 
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