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

Bariatric and transplant surgeon

Dr. Andrew Posselt, a bariatric and transplant surgeon, is co-director of the Pancreatic Islet Transplantation Program at UCSF Medical Center. He specializes in adult and pediatric kidney, liver and pancreas transplantation as well as laparoscopic and open bariatric surgery. In addition to caring for patients, he conducts research on pancreatic islet cell transplantation, mechanisms of allograft rejection and tolerance, and the metabolic and biochemical consequences of bariatric surgery.

Posselt is a member of several professional and honorary societies and has given presentations on transplant issues related to clinical care and research. He is an associate professor in residency in surgery at UCSF, where he supervises residents and fellows in transplant services and general surgery. He earned medical and doctorate degrees in immunology from the University of Pennsylvania and completed an internal medicine residency, general surgery residency and transplant fellowship at UCSF, before joining the staff in 2003.

Read a Q&A with Posselt, who discusses islet cell transplants to treat diabetes.

Clinics

Bariatric Surgery Center
400 Parnassus Ave., Sixth Floor, Room A-655
San Francisco, CA 94143-0338
Phone: (415) 353-2804
Fax: (415) 353-2505

Hours: Monday to Friday
8 a.m. – 5 p.m.

Connie Frank Transplant Center at UCSF
400 Parnassus Ave., Seventh Floor
San Francisco, CA 94143
Phone: (415) 353-1551
Pre-Kidney Fax: (415) 353-8708
Post-Kidney Fax: (415) 353-8381

Hours: 8 a.m. – 5 p.m.

Liver Transplant Program
400 Parnassus Ave., Sixth Floor
San Francisco, CA 94143
Phone: (415) 353-1888
Fax: (415) 353-8917

Hours: Pre-Liver Transplant Clinic Monday, Tuesday 7 a.m. – 12 p.m.
Hours: Post-Liver Transplant Clinic Tuesday 8 a.m. – 12 p.m.

Pancreas Transplant Services
400 Parnassus Ave., Seventh Floor
San Francisco, CA 94143
Phone: (415) 353-1551
Pre-Transplant Fax: (415) 353-8708
Post-Transplant Fax: (415) 353-4183

Hours: Monday to Friday
8 a.m. – 5 p.m.

Conditions & Treatments

More about Andrew Posselt

Additional Languages

Czechoslovakian
French
German
Spanish

Education

University of Pennsylvania School of Medicine 1993

Residencies

UCSF Medical Center, Internal Medicine 1996
UCSF Medical Center, Surgery 2000

Selected Research and Publications

  1. Benedict KA, Moassesfar S, Adi S, Gitelman SE, Brennan JL, McEnhill M, Stock PG, Portale AA, Posselt AM. Combined pancreatic islet and kidney transplantation in a child with unstable type 1 diabetes and end-stage renal disease. Am J Transplant. 2013 Aug; 13(8):2207-10.
  2. Lin MY, Tavakol MM, Sarin A, Amirkiai SM, Rogers SJ, Carter JT, Posselt AM. Laparoscopic sleeve gastrectomy is safe and efficacious for pretransplant candidates. Surg Obes Relat Dis. 2013 Sep-Oct; 9(5):653-8.
  3. Barton FB, Rickels MR, Alejandro R, Hering BJ, Wease S, Naziruddin B, Oberholzer J, Odorico JS, Garfinkel MR, Levy M, Pattou F, Berney T, Secchi A, Messinger S, Senior PA, Maffi P, Posselt A, Stock PG, Kaufman DB, Luo X, Kandeel F, Cagliero E, Turgeon NA, Witkowski P, Naji A, O'Connell PJ, Greenbaum C, Kudva YC, Brayman KL, Aull MJ, Larsen C, Kay TW, Fernandez LA, Vantyghem MC, Bellin M, Shapiro AM. Improvement in outcomes of clinical islet transplantation: 1999-2010. Diabetes Care. 2012 Jul; 35(7):1436-45.
  4. Lin MY, Tavakol MM, Sarin A, Amirkiai SM, Rogers SJ, Carter JT, Posselt AM. Safety and feasibility of sleeve gastrectomy in morbidly obese patients following liver transplantation. Surg Endosc. 2013 Jan; 27(1):81-5.
  5. Berney T, Korsgren O, Posselt A, Pileggi A. Islet Transplantation & -Cell Replacement Therapies for Diabetes. J Transplant. 2011; 2011:157840.
  6. Ahearn AJ, Posselt AM, Kang SM, Roberts JP, Freise CE. Experience with laparoscopic donor nephrectomy among more than 1000 cases: low complication rates, despite more challenging cases. Arch Surg. 2011 Jul; 146(7):859-64.
  7. Rabl C, Peeva S, Prado K, James AW, Rogers SJ, Posselt A, Campos GM. Early and late abdominal bleeding after Roux-en-Y gastric bypass: sources and tailored therapeutic strategies. Obes Surg. 2011 Apr; 21(4):413-20.
  8. Posselt AM, Szot GL, Frassetto LA, Masharani U, Tavakol M, Amin R, McElroy J, Ramos MD, Kerlan RK, Fong L, Vincenti F, Bluestone JA, Stock PG. Islet transplantation in type 1 diabetic patients using calcineurin inhibitor-free immunosuppressive protocols based on T-cell adhesion or costimulation blockade. Transplantation. 2010 Dec 27; 90(12):1595-601.
  9. Posselt AM, Bellin MD, Tavakol M, Szot GL, Frassetto LA, Masharani U, Kerlan RK, Fong L, Vincenti FG, Hering BJ, Bluestone JA, Stock PG. Islet transplantation in type 1 diabetics using an immunosuppressive protocol based on the anti-LFA-1 antibody efalizumab. Am J Transplant. 2010 Aug; 10(8):1870-80.
  10. Posselt AM, Szot GL, Frassetto LA, Masharani U, Stock PG. Clinical islet transplantation at the University of California, San Francisco. Clin Transpl. 2010; 235-43.
  11. Szot GL, Lee MR, Tavakol MM, Lang J, Dekovic F, Kerlan RK, Stock PG, Posselt AM. Successful clinical islet isolation using a GMP-manufactured collagenase and neutral protease. Transplantation. 2009 Sep 27; 88(6):753-6.
  12. James AW, Rabl C, Westphalen AC, Fogarty PF, Posselt AM, Campos GM. Portomesenteric venous thrombosis after laparoscopic surgery: a systematic literature review. Arch Surg. 2009 Jun; 144(6):520-6.
  13. Tavakol MM, Vincenti FG, Assadi H, Frederick MJ, Tomlanovich SJ, Roberts JP, Posselt AM. Long-term renal function and cardiovascular disease risk in obese kidney donors. Clin J Am Soc Nephrol. 2009 Jul; 4(7):1230-8.
  14. Campos GM, Rabl C, Mulligan K, Posselt A, Rogers SJ, Westphalen AC, Lin F, Vittinghoff E. Factors associated with weight loss after gastric bypass. Arch Surg. 2008 Sep; 143(9):877-883; discussion 884.
  15. Campos GM, Bambha K, Vittinghoff E, Rabl C, Posselt AM, Ciovica R, Tiwari U, Ferrel L, Pabst M, Bass NM, Merriman RB. A clinical scoring system for predicting nonalcoholic steatohepatitis in morbidly obese patients. Hepatology. 2008 Jun; 47(6):1916-23.
  16. 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 Mar-Apr; 4(2):159-64; discussion 164-5.
  17. Lee RH, Carter J, Szot GL, Posselt A, Stock P. Human albumin preserves islet mass and function better than whole serum during pretransplantation islet culture. Transplant Proc. 2008 Mar; 40(2):384-6.
  18. Ciovica R, Takata M, Vittinghoff E, Lin F, Posselt AM, Rabl C, Stein HJ, Campos GM. The impact of roux limb length on weight loss after gastric bypass. Obes Surg. 2008 Jan; 18(1):5-10.
  19. Mahanty HD, Posselt AM, Lipshutz GS, Schneider DB, Freise CE. Catheter-directed therapy for DVT after pancreas transplantation. Clin Transplant. 2007 Nov-Dec; 21(6):748-54.
  20. Campos GM, Ciovica R, Rogers SJ, Posselt AM, Vittinghoff E, Takata M, Cello JP. Spectrum and risk factors of complications after gastric bypass. Arch Surg. 2007 Oct; 142(10):969-75; discussion 976.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.