Abdominal Transplant Fellowship »  Faculty »  Andrew M. Posselt, M.D., Ph.D.

Andrew M. Posselt, M.D., Ph.D., FACS

Associate Professor of Surgery
Division of Transplant Surgery
Co-Director, Pancreatic Islet Cell Transplant Program

Contact Information

Academic Office
(415) 514-5606
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  • Stanford University, B.S., Biology, 1981-85
  • University of Pennsylvania, M.D., Medicine, 1985-93
  • University of Pennsylvania, Ph.D., Immunology, 1989-93
  • University of California, San Francisco, Resident, Medicine, 1993-96
  • University of California, San Francisco, Resident, Surgery, 1996-00
  • University of California, San Francisco, Fellow, Transplant Surgery, 2000-02
  • American Board of Internal Medicine, 1996
  • American Board of Surgery, 2002
  • Pancreatic Islet Transplantation Program
  • Bariatric Surgery Center
  • ABO-Incompatible Kidney Transplant Program
  • Autologous Islet Cell Transplantation
  • Bariatric Surgery (Laparoscopic and Open)
  • Bile Duct Injuries
  • Bile Duct Strictures
  • Choledochal Cyst Disease
  • End-Stage Kidney Disease
  • Fulminant Hepatic Failure
  • Hepatitis B
  • Hepatitis C
  • Hepatocellular Carcinoma (Primary Liver Cancer)
  • Islet Cell Transplantation
  • Kidney Transplantation
  • Laparoscopic Donor Nephrectomy
  • Liver Cysts
  • Liver Transplantation
  • Nonalcoholic Fatty Liver Disease
  • Pancreas Transplantation
  • Pediatric Kidney Transplantation
  • Pediatric Liver Transplantation
  • Portal Hypertension
  • Assessment of long-term clinical outcomes in kidney donors
  • Clinical outcomes of bariatric surgery in patients with end-stage kidney or liver disease
  • Metabolic and biochemical consequences of bariatric surgery
  • Transplantation of pancreatic islets as treatment for type 1 diabetes mellitus

Dr. Andrew Posselt is an attending multi-organ transplant surgeon at UCSF and Director of the ABO-Incompatible Kidney Transplant Program as well as Co-director of the Pancreatic Islet Transplant Program and the Bariatric Surgery Program.  Dr. Posselt specializes in adult and pediatric kidney, liver and pancreas transplantation; laparoscopic donor nephrectomy; and laparoscopic as well as open bariatric surgery.  Dr. Posselt's current research interests include: 1) transplantation of pancreatic islets for the treatment of type 1 diabetes mellitus; 2) assessment of long-term renal function in kidney donors after donor nephrectomy; 3) immunologic and tolerogenic properties of embryonic stem cells; and 4) bariatric surgery in patients awaiting transplant. Highly respected by his peers, Dr. Posselt was named to the list of U.S. News "America's Top Doctors," a distinction reserved for the top 1% of physicians in the nation for a given specialty.

  1. Posselt AM, Barker CF, Tomaszewski JE, Markmann JF, Choti MA, Naji A. Induction of donor-specific unresponsiveness by intrathymic islet transplantation. Science. 249:1293-5, Sep/14/1990.
  2. Posselt AM, Barker CF, Friedman AL, Naji A. Prevention of autoimmune diabetes in the BB rat by intrathymic islet transplantation at birth. Science. 256:1321-4, May/29/1992.
  3. Carter JT, Freise CE, McTaggart RA, Mahanty HD, Kang SM, Chan SH, Feng S, Roberts JP, Posselt AM. Laparoscopic procurement of kidneys with multiple renal arteries is associated with increased ureteral complications in the recipient. Am J Transplant. 5:1312-8, Jun/2005.
  4. Carter J, Tafreshian S, Campos G, Tiwari U, Herbella F, Cello J, Patti M, Rogers S, Posselt AM. A routine upper GI series after gastric bypass does not reliably identify anastomotic leaks or predict stricture formation. Surg Endosc., May/5/2007.
  5. Takata MC, Campos GM, Ciovica R, Rabl C, Rogers SJ, Cello JP, Ascher NL, Posselt AM. Laparoscopic bariatric surgery improves candidacy in morbidly obese patients awaiting transplantation. Surg Obes Relat Dis. 2008.