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

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

Professor of Surgery
Division of Transplant Surgery
Director, Pancreatic Islet Transplant Program

Contact Information

Academic Office
(415) 514-5606
andrew.posselt@ucsf.edu
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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.

 
Most recent publications from a total of 72
  1. Song S, Faleo G, Yeung R, Kant R, Posselt AM, Desai TA, Tang Q, Roy S. Silicon nanopore membrane (SNM) for islet encapsulation and immunoisolation under convective transport. Sci Rep. 2016; 6:23679. View in PubMed
  2. McEnhill ME, Brennan JL, Winnicki E, Lee MM, Tavakol M, Posselt AM, Stock PG, Portale AA. Effect of Immigration Status on Outcomes in Pediatric Kidney Transplant Recipients. Am J Transplant. 2016 Jun; 16(6):1827-33. View in PubMed
  3. Usatin DJ, Perito ER, Posselt AM, Rosenthal P. Under Utilization of Pancreas Transplants in Cystic Fibrosis Recipients in the United Network Organ Sharing (UNOS) Data 1987-2014. Am J Transplant. 2016 May; 16(5):1620-5. View in PubMed
  4. Moassesfar S, Masharani U, Frassetto LA, Szot GL, Tavakol M, Stock PG, Posselt AM. A Comparative Analysis of the Safety, Efficacy, and Cost of Islet Versus Pancreas Transplantation in Nonuremic Patients With Type 1 Diabetes. Am J Transplant. 2015 Nov 23. View in PubMed
  5. Schafer AL, Weaver CM, Black DM, Wheeler AL, Chang H, Szefc GV, Stewart L, Rogers SJ, Carter JT, Posselt AM, Shoback DM, Sellmeyer DE. Intestinal Calcium Absorption Decreases Dramatically After Gastric Bypass Surgery Despite Optimization of Vitamin D Status. J Bone Miner Res. 2015 Aug; 30(8):1377-85. View in PubMed
  6. Tai DS, Shen N, Szot GL, Posselt A, Feduska NJ, Habashy A, Clerkin B, Core E, Busuttil RW, Hines OJ, Reber HA, Lipshutz GS. Autologous islet transplantation with remote islet isolation after pancreas resection for chronic pancreatitis. JAMA Surg. 2015 Feb 1; 150(2):118-24. View in PubMed
  7. Schafer AL, Li X, Schwartz AV, Tufts LS, Wheeler AL, Grunfeld C, Stewart L, Rogers SJ, Carter JT, Posselt AM, Black DM, Shoback DM. Changes in vertebral bone marrow fat and bone mass after gastric bypass surgery: A pilot study. Bone. 2015 May; 74:140-5. View in PubMed
  8. Ahearn AJ, Parekh JR, Posselt AM. Islet transplantation for Type 1 diabetes: where are we now? Expert Rev Clin Immunol. 2015 Jan; 11(1):59-68. View in PubMed
  9. Balamurugan AN, Naziruddin B, Lockridge A, Tiwari M, Loganathan G, Takita M, Matsumoto S, Papas K, Trieger M, Rainis H, Kin T, Kay TW, Wease S, Messinger S, Ricordi C, Alejandro R, Markmann J, Kerr-Conti J, Rickels MR, Liu C, Zhang X, Witkowski P, Posselt A, Maffi P, Secchi A, Berney T, O'Connell PJ, Hering BJ, Barton FB. Islet product characteristics and factors related to successful human islet transplantation from the Collaborative Islet Transplant Registry (CITR) 1999-2010. Am J Transplant. 2014 Nov; 14(11):2595-606. View in PubMed
  10. Kitzmann JP, Pepper AR, Gala-Lopez B, Pawlick R, Kin T, O'Gorman D, Mueller KR, Gruessner AC, Avgoustiniatos ES, Karatzas T, Szot GL, Posselt AM, Stock PG, Wilson JR, Shapiro AM, Papas KK. Human islet viability and function is maintained during high-density shipment in silicone rubber membrane vessels. Transplant Proc. 2014 Jul-Aug; 46(6):1989-91. View in PubMed
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  • Mike Schofield

    Islet Cell Transplantation Helps Mike Schofield Acheive Insulin Independence from Type 1 Diabetes

    My life changed forever almost 30 years ago. I was 21, and had just started my dream job as a commercial pilot. When I was in Belgium, I was hospitalized with an unknown condition. Two days later I learned that I had type 1 diabetes. As soon as I was diagnosed, I learned that the condition disqualified me from maintaining my pilot's license. Although I regularly monitored my blood sugar levels, kept a strict diet and exercised diligently, any imbalance could lead to a hypoglycemic attack. These attacks made me feel like I was in a fog - my body muscles tensed and I could barely move. I knew[...]
    Mike Schofield with Family 1.JPG
    Story Categories: Islet Cell TransplantType 1 Diabetes
  • Sandy Raffi-Rashed

    Surgery Ends Decades of Obesity, New Life Begins

    Sandy Raffi-Rashed after losing 185 poundsWhen Sandy Raffi-Rashed, a 60-year-old mother of two, went to the airport to pick up her youngest son visiting from Manhatten, he didn't recognize her. "I was waving to him from the car and he thought, 'Who is that strange woman waving at me?" says Raffi-Rashed, of Novato, Calif. "Then, when he saw me, he said, 'Oh my God!'" His mother had undergone a transformation after weight-loss surgery. In July of 2011, Raffi-Rashed had gastric bypass surgery at the Bariatric Surgery Center at UCSF Medical[...]
    Sandy Raffi-Rashed after losing 185 pounds
    Story Categories: Laparoscopic Gastric BypassNon-alcoholic Fatty Liver DiseaseObesityPost-Bariatric Body Contouring Plastic Surgery

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