Gregory Abrahamian, MD

UT Health San Antonio
Schedule an appointment: 210-743-4306
General Surgery
Board Affiliation/Certification
American Board of Surgery
University of Texas Health Science Center at San Antonio, 1992
Wilford Hall Medical Center-Usaf, 1997
Massachusetts General Hospital, 1999

Texas Liver Tumor Center

7979 Wurzbach Road
Suite 219, Urschel Bldg
San Antonio,TX 78229

University Hospital

4502 Medical Drive
San Antonio,TX 78229
Insurance Accepted
6 Degrees - Transplant
90 Degree Benefits - Commercial
Aetna - Commercial Exchange
Aetna - PPO/EPO/HMO/MC Advantage
Aetna - Smart Care EPO
Aetna - Transplant
Aetna Better Health - Medicaid-CHIP
Aetna Better Health - Medicaid-STAR
Ancira Enterprises - Direct Employer
Blue Cross Blue Shield of Texas - Exchange (BlueAdvantage)
Blue Cross Blue Shield of Texas - HMO/PPO
Blue Cross Blue Shield of Texas - HPN/EPO (Narrow Network)
Blue Cross Blue Shield of Texas - Medicaid-STAR
Blue Cross Blue Shield of Texas - Medicare Advantage HMO
Blue Cross Blue Shield of Texas - Medicare Advantage PPO
Blue Cross Blue Shield of Texas - Narrow HMO (Blue Essentials)
Blue Cross Blue Shield of Texas - Narrow HMO (Blue Premier)
Blue Cross Blue Shield of Texas - Traditional
Blue Cross Blue Shield of Texas - Transplant Programs
Care Improvement Plus - Medicare Advantage-SNP
Cenpatico - Medicaid-CHIP
Cenpatico - Medicaid-STAR
Cenpatico - Medicaid-STAR Health (Foster Care)
Cenpatico - Medicare Advantage
Cigna (USSA Client Only) - Direct Employer
Community First Health Plans - HMO/Exchange (EPO)
Community First Health Plans - Medicaid-CHIP
Community First Health Plans - Medicaid-CHIP Perinate
Community First Health Plans - Medicaid-STAR
Community First Health Plans - Medicaid-STAR Kids
Community First Health Plans - Medicare Advantage HMO
Coventry - HMO/PPO
Coventry - Work Comp / Auto
Driscoll Health Plan - Medicaid-All
El Paso First - Medicaid-CHIP
El Paso First - Medicaid-STAR
Entrust - TPA
First Health - Commercial PPO
FirstCare (Part of Scott & White Health Plans) - Medicaid-STAR
Gonzaba Medical Group - Transplant ONLY
Healthsmart - Accel
Healthsmart - Commercial PPO
Healthsmart - HPO/POS
Humana - Commercial Behavioral Health
Humana - Exchange (HMOx)
Humana - HMO/PPO/Behavioral Health
Humana - Medicare Advantage Behavioral Health
Humana - Medicare Advantage HMO (Gold)
Humana - Medicare Advantage PPO
Humana - National Transplant ONLY Network
Humana Military - TRICARE
Imperial Health Plan - Medicare Advantage
Independent Medical Systems (IMS) - PPO
Interlink - Transplant
LifeTrac - Transplant
Magellan - Commercial and Medicaid Behavioral Health
Molina - Commercial Exchange
Molina - Medicaid-CHIP
Molina - Medicaid-CHIP Perinate
Molina - Medicaid-STAR
Molina - Medicare Advantage
Molina - Medicare-Medicaid Duals
MultiPlan - Work Comp
MultiPlan - Wrap Network
OptumHealth - Transplant ONLY
Oscar - Commercial Exchange
Point Comfort Underwriters (PCU) - Refugee Medical Assistance
Point Comfort Underwriters (PCU) - Unaccompanied Children
Prime Health Services - Commercial PPO
Prime Health Services - Medicare Advantage
Private Healthcare Systems (PHCS) - Commercial PPO
ProCare Advantage - Medicare Advantage I-SNP
Provider Network of America (PNOA) - Commercial
Provider Partners Health Plan (PPHP) - Medicare Advantage I-SNP
Scott & White Health Plan - HMO/PPO/Medicare Advantage
Superior HealthPlan - Medicaid-CHIP
Superior HealthPlan - Medicaid-CHIP Perinate
Superior HealthPlan - Medicaid-STAR
Superior HealthPlan - Medicaid-STAR Health (Foster Care)
Superior HealthPlan - Medicaid-STAR Kids
Superior HealthPlan - Medicaid-STAR PLUS
Superior HealthPlan - Medicare Advantage (Allwell)
Superior HealthPlan - Medicare-Medicaid Duals (Allwell)
Texas Independence Health Plan - Medicare Advantage I-SNP
Three Rivers Provider Network - PPO
Tokio Marine - Transplant
TriWest (via BCBSTX) - VA CCN Program
UnitedHealthcare - Medicaid-STAR
UnitedHealthcare - Medicaid-STAR Kids
UnitedHealthcare - Medicaid-STAR PLUS
UnitedHealthcare - Medicare Advantage
UnitedHealthcare - PPO
Universal Benefits Consortium - Brokerage Firm (School Districts)
University of Incarnate Word (Gilsbar) - Direct Employer
Velocity National Provider Network - Commercial PPO
Velocity National Provider Network - Wrap Network
WellCare - Medicare Advantage
WellMed - Medicare Advantage
WellPoint (Gonzaba) - Medicare Advantage (TRANSPLANTS ONLY)
WellPoint - Medicaid-CHIP
WellPoint - Medicaid-CHIP Perinate
WellPoint - Medicaid-STAR
WellPoint - Medicaid-STAR Kids
WellPoint - Medicaid-STAR PLUS
WellPoint - Medicare Advantage
WellPoint - Medicare-Medicaid Duals
Please contact your health insurance company to confirm provider participation. For billing and insurance questions, please call our Billing Department at 210-358-3260.
I specialize in adult and pediatric kidney and liver transplant surgery. I received my medical degree from UT Health San Antonio. I completed his residency and transplant fellowship at Wilford Hall Medical Center in San Antonio, Texas, and Massachusetts General Hospital. I specialize in adult and pediatric kidney and liver transplant surgery and have served with the United States Air Force overseas. I have also contributed to many notable publications in my field.


  1. Paez AM, Kamath S, Casiraghi F, Davalli AM, Abrahamian G, Ricotti A, La Rosa S, Comuzzie A, Marando A, Finzi G, Dick E, De Fronzo R, Halff G, Folli F. Chronic exenatide infusion increases insulin sensitivity, decreases insulin secretion and stimulates Islet Cell Proliferation in partially Pancreatectomized Baboons 2012. (Diabetologia; vol. 55).
  2. Kamath S, Chavez AO, Casiraghi F, Cline G, Davalli A, Halff G, Abrahamian G, Bastarrachea R, Comuzzie A, Gastaldelli A., Federici M, Marzano V, Urbani A, De Fronzo RA, Folli, F. Critical role of triglycerides and long chain fatty acyl Coa accumulation in liver insulin resistance in the baboon. a new non-human primate model of NAFLD 2011. p. 499-499. (Journal of Hepatology; vol. 54).
  3. Casiraghi F, Chavez AO, Davalli A, Abrahamian GA, Gastaldelli A, Bastarrachea R,Kamath S, Petz R, Zou P,Higgins P,Chang Z, Comuzzie A, Halff G, RALPH DeFronzo RA, Folli F. Effect of Continuous Exenatide Infusion on Insulin Action and Secretion in Partially Pancreatectomized Baboons 2011 Jan. (Diabetes; vol. Supp, no. 1).
  4. Washburn WK, Speeg KV, Guerrero JA, Havranek R, Esterl RM, Abrahamian GA, Cigarroa FG, Halff GA. MELD: Impact of Hepatocellular Carcinoma on the Adult Liver Transplant Waiting List 2003. p. 374A. (Hepatology; vol. 38).
  5. Pollack MS, Speeg KV, Nolan III CR, Washburn WK, Esterl RM, Abrahamian GA, Halff GA. Successful Combined Liver/Kidney Transplantation in Highly Sensitized, Crossmatch Positive Patients. 2002 Oct. p. S74. (Human Immunology; vol. 63, no. 10).

Book Chapters

  1. Jay CL, Abrahamian GA, Edwards AR. Care of the Pancreas Transplant Recipient (in press) In: Irwin and Rippes Intensive Care Medicine, 8th Edition (in press). Lippincott Williams & Wilkins Health; 2015.
  2. Abrahamian GA. Care of the Pancreas Transplant Recipient In: Irwin RS, Rippe JM. Intensive Care Medicine. Philadelphia: Lippincott; 2012.
  3. Abrahamian GA. Diagnosis and Treatment of Variceal Hemorrhage due to Cirrhosis. In: Esterl RM Speeg KV Abrahamian GA. Acute Care Surgery and Trauma: Evidenced Based Practice. UK: Informa Healthcare, UK, Ltd.; 2009. p. 406 - 414.
  4. Abrahamian GA, Esterl RM. Renal Transplantation. In: Essential Emergency Medicine for the Healthcare Practitioner. Philadelphia, PA: Saunders; 2007.
  5. Abrahamian GA, Cosimi, AB. Antithymocyte globulin and monoclonal antibodies. In: Morris,P.j.(ed):Kidney Transplantation, 5th edition. Philadelphia: W.B. Saunders; 2001.

Journal Articles

  1. Jay C, Pugh J, Halff G, Abrahamian G, Cigarroa F, Washburn K. Graft quality matters: Survival after simultaneous liver-kidney transplant according to KDPI Clinical Transplantation 2017 Mar.
  2. Fiorentino TV, Owston M, Abrahamian G, La Rosa S, Marando A, Perego C, Di Cairano ES, Finzi G, Capella C, Sessa F, Casirahi F, Paez An, Adivi A, Davalli A, Fiorina P, Mendoza RG, Comuzzie AG, DeFronzo RA, Halff G, Dick EJ, Folli F. Chronic continuous exenatide infusion does not cause pancreatic inflammation and ductal hyperplasia in non-human primates (Baboons: Papio Hamadryas) Am J Pathology 2015 Jan;185:139-150.
  3. Casiraghi F, Chavez AO, Davalli AM, Abrahamian GA, Gastaldelli A, Bastarrachea RA, Kamath S, Petz R, Zuo P, Ricotti A, Higgins PB, Comuzzie A, Halff GA, DeFronzo RA, Folli F. Continuous exenatide infusion markedly improves insulin sensitivity and disposition index in partially pancreatectomized baboons Diabetologia 2011;54:S213-S214.
  4. Kamath S, Chavez AO, Gastaldelli A, Casiraghi F, Halff GA, Abrahamian GA, Davalli AM, Bastarrachea RA, Comuzzie AG, Guardado-Mendoza R, Jimenez-Ceja LM, Mattern V, Paez AM, Ricotti A, Tejero ME, Higgins PB, Rodriguez-Sanchez IP, Tripathy D, Defronzo RA, Dick EJ, Cline GW, Folli F. Coordinated defects in hepatic long chain Fatty Acid metabolism and triglyceride accumulation contribute to insulin resistance in non-human primates. PLoS One 2011 Nov;6(11):27617-27617.
  5. Folli F, Casiraghi F, Davalli AM, Kamath S, Ricotti A, Chang Z, Gastaldelli A, Abrahamian GA, Halff GA, Defronzo RA, Chavez AO. Insulin sensitivity, beta cell function and subclinical inflammation in the baboon, a non human primate model of insulin resistance, obesity and type 2 diabetes. Diabetologia 2011;54(Suppl):S272-S273.
  6. Tuder D, Pederson WC, Abrahamian GA, Ingari JV, Bagg MC, Person DW, Martyak GG. San Antonio military and civilian hand transplantation program: a case report. Transplant Proc 2011 Nov;43(9):3561-3562.
  7. Nadazdin O, Abrahamian G, Boskovic S, Smith RN, Schoenfeld DA, Madsen JC, Colvin RB, Sachs DH, Cosimi AB, Kawai T, Abrahamian GA. Stem Cell Mobilization and Collection for Induction of Mixed Chimerism and Renal Allograft Tolerance in Cynomolgus Monkeys. J Surg Res 2010 Mar.
  8. Cornejo A, Bohnenblust M, Harris C, Abrahamian GA. Intestinal perforation associated with rituximab therapy for post-transplant lymphoproliferative disorder after liver transplantation. Cancer Chemother Pharmacol 2009 Sep;64(4):857-860.
  9. Sharron JA, Esterl RM, Washburn WK, Abrahamian GA. Surgical Treatment of an Extrarenal Pseudoaneurysm After Kidney Transplantation. Vasc Endovascular Surg 2009 Feb.
  10. Sogawa H, Boskovic S, Nadazdin O, Abrahamian G, Colvin ROBERT, Sachs DAVID, Cosimi A, Kawai T, Abrahamian GA. Limited Efficacy and Unacceptable Toxicity of Cyclophosphamide for the Induction of Mixed Chimerism and Renal Allograft Tolerance in Cynomolgus Monkeys. Transplantation 2008 Aug;86(4):615-619.
  11. Pollack MS, Speeg KV, Callander NS, Freytes CO, Espinoza AA, Esterl RM, Abrahamian GA, Washburn WK, Halff GA. Severe, late-onset graft-versus-host disease in a liver transplant recipient documented by chimerism analysis. Hum Immunol 2005 Jan;66(1):28-31.
  12. Kawai, T., Sogawa, H., Boskovic, S., Abrahamian GA, Smith, R.N., Wee, S.L., Andrews, D., Nadazdin, O., Koyama, I., Sykes, M., Winn, H.J., Colvin, R.B., Sachs, D.H., Cosimi, A.B. CD154 blockade for induction of mixed chimerism and prolonged renal allograft survival in nonhuman primates. American Journal of Transplantation 2004 Sep;4(0):1391-1398.
  13. Halff G, Speeg KV, Washburn K, Esterl R, Abrahamian G, Mejia A, Nichols L, Neigut D, Dodd G, Cigarroa F, Abrahamian GA. Liver transplantation at the University of Texas Health Science Center/University Hospital in San Antonio. Clin Transpl 2003 Jan:247-253.
  14. Jones WT, Ratner I, Abrahamian G, Washburn WK, Esterl R, Neigut D, Halff G. Use of a SILASTIC Silo for Closure of the Abdominal Wall in a Pediatric Patient Receiving a Cadaveric Split Liver. J Pediatric Surgery 2003 Oct;38(10):E20-22.
  15. Kawai,T., Cosimi,A.B., Wee,S.L., Houser,S., Andrew,D., Sogawa,H., Phelan,J., Boskovic,S., Nadazdin,O., Abrahamian GA, Colvin,R.B., Sach,D.H., Madsen,J.C. Effect of mixed hematopoietic chimerism on cardiac allograft survival in cynomolgus monkeys. Transplantation 2002 Jan;73(11):1757-1764.
  16. Bingener-Casey J, Esterl RM, Kenneth Washburn W, Cigarroa FG, Abrahamian GA, Halff GA. Tc-99m-labeled Red Blood Cell Scanning Localizes Anastomotic Hemorrhage Between the Distal Ileum and Duodenal Stump of an Enteric-drained Pancreas Transplant. Clin Nucl Med 2002 Mar;27(3):205-206.
  17. Kawai,T., Abrahamian GA, Sogawa,H., Wee,S., Boskovic,S., Andrew,D., Nadazdin,O., Mauiyyedi,S., Weymouth,D., Ko,D., Colvin,R., Sach,D.H., Madsen, J.C. Co-stimulatory blockade for induction of mixed chimerism and renal allograft tolerance in nonhuman primates Transplant Proc 2001 Jan;31(1-2):221-222.
  18. Sogawa,H., Kawai,T., Wee,S.L., Boskovic,S., Nadazdin,O., Phelan,J., Abrahamian GA, Ko, D.S., Hong,H., Mauiyyedi,S., Colvin,R.B., Sachs,D.H.,Cosimi,A.B. Comparison of horse antithymocyte globulin with other T cell-depleting antibodies for induction of chimerism and renal allograft tolerance in non-human primates Transplant Proc 2001 Jan;33(1-2):116-117.
  19. Kawai,T., Wee,S.L., Bazin,H., Latinne,D., Phelan,J., Boskovic,S., Ko,D.S., Hong,H.Z., Mauiyyedi,S., Nadazdin,O., Abrahamian GA, Preffer,F., Colvin,R.B., Sachs,D.H., Cosimi,A.B. Association of natural killer cell depletion with induction of mixed chimerism and allograft tolerance in non-human primates. Transplantation 2000 Jan;70(2):368-374.
  20. Abrahamian GA, Cosimi AB, Farrell ML, Schoenfeld DA, Chung RT, Pascual M. Prevalence of hepatitis C virus-associated mixed cryoglobulinemia after liver transplantation. Liver Transpl 2000 Mar;6(2):185-190.
  21. Kawai, T., Poncelet, A., Sachs, D.H., Mauiyyedi, S., Boskovic, S., Wee, S.L., Ko, D.S., Bartholomew, A., Kimikawa, M., Hong, H.Z., Abrahamian GA, Colvin, R. B., Cosimi, A.B. Long-term outcome and alloantibody production in a non-myeloablative regimen for induction of renal allograft tolerance. Transplantation 1999;68:1767-1775.
  22. Abrahamian,G.A.,Polhamus,C.,Muskat,P.,Karulf,R. Diaphragm-like strictures of the ileum associated with NSAID use: a rare complication. South Medical Journal 1998;91:395-397.
  23. Shikora,S.A.,Abrahamian,G.A.,Gaines,C.E. Can a bariatric surgery program succeed without close patient proximity? The experience in a military center. Obesity Surgery 1994;4:238-243.
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