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Meet the Medicine Alumni Society Board


Sion "Bill” Carter MD ’87, Chair

Sion "Bill” Carter, MD received his medical degree from USF in 1987 and completed his residency in Radiology at Wake Forest University Bowman Gray School of Medicine. Dr. Carter entered private practice in Pensacola, Florida, becoming partner at the Medical Clinic Center, PA and attending physician in the Radiology section of West Florida Hospital. Leadership roles included Chairmanship of the Radiology department and a Director on the Board governing the 140+ member multi-specialty clinic.

After nine years of practice he obtained additional fellowship training in Musculoskeletal Radiology and MRI and then joined a private practice radiology group in Tampa, FL, where he was a partner and attending physician at St. Joseph’s Hospital for 14 years and past president of SDI Radiology. Sports medicine imaging is a special interest of Dr. Carter and he has reviewed and interpreted MRI exams on many high profile professional athletes since 2001. In 2014 he co-founded a teleradiology company, and in 2016 he joined the Florida Medical Clinic where he is currently in full time practice.




Aman Bhullar MD '07, Vice Chair

Aman Bhullar, MD has been active on the Board since 2009. Aman has been passionate about the importance of helping our alumni remain connected with our great University and College of Medicine. Aman is USF COM Class of 2007 and completed an Internal Medicine residency from Albert Einstein Montefiore Medical Center. He currently works as a hospitalist. Aman recently graduated with an MBA from The Wharton School of the University of Pennsylvania and has co-founded healthcare technology start-ups including, PACSPoint.







Nishit Patel MD ‘10, Secretary/Treasurer

Nishit Patel, MD completed his medical degree at USF in 2010. He is currently an Assistant Professor in the USF Morsani COM Department of Dermatology & Cutaneous Surgery. He also serves as the Associate Program Director for the dermatology residency program and Associate Director of the department's Clinical Research Unit. He is also an Assistant Member of the Department of Cutaneous Oncology at Moffitt Cancer Center. His clinical and research interests include the prevention, detection, and treatment of cutaneous malignancies in immunosuppressed patients.





Valerie Riddle MD '89, Immediate Past Chair

Valerie Riddle, MD has been active on the Board since 2009. She lives in Virginia and is a dual USF graduate - completed her undergrad degree at USF in 1984 and received her medical degree from USF in 1989. Her business, BioPharmAdvisors, LLC, provides clinical trial consulting services to emerging biotechnology and pharmaceutical companies. She is also a contract Medical Officer in the Respiratory Diseases Branch/Division of Microbiology and Infectious Diseases at the National Institutes of Health. She is a member of Women in Leadership & Philanthropy at USF and is a member of the USF Foundation Board of Directors.





David Cooper MD '96

David Cooper, MD received his medical degree from USF in 1996 and masters in public health from USF in 1999.  He completed his residency in Pediatrics at USF/All Children’s Hospital, fellowship in Pediatric Cardiology at Cincinnati Children’s Hospital and fellowship in Pediatric Critical Care at UT Southwestern/Children’s Medical Center Dallas.  Dr. Cooper currently serves as the Medical Director of the Cardiac Intensive Care Unit, Heart Institute Safety Officer and Co-Director of the Center for Acute Care Nephrology at Cincinnati Children’s Hospital Medical Center. For the last 13 years, his career has focused on the care of critically ill neonates, infants, children and adults with complex congenital heart disease, with a particular interest in how care delivery in the intensive care unit can impact morbidity.  His research is focused on extracorporeal support, acute/chronic kidney injury and patient outcomes.  Furthermore, he has had extensive involvement with the Pediatric Cardiac Critical Care Consortium (PC4), including the development of the PC4 Cardiac Intensive Care Unit database that is used to track and improve outcomes for patients with critical cardiac disease.


Corey Howard MD '90

Dr. Corey Howard graduated from the University of South Florida, Cum Laude and completed medical school at the Morsani College of Medicine. He completed his internship year at the Long Island Jewish campus of the Albert Einstein College of Medicine before coming back to Tampa and USF Health in the department of internal medicine. He served as chief resident at Tampa General Hospital, was the president of the house staff association and was awarded the resident of the year award by the American College of Physicians. He then completed a fellowship in Digestive diseases and nutrition.


Dr. Howard has been in private practice for 20 years, completed additional training and certifications in anti-aging, functional and regenerative medicine and obtained the professional certification in plant based nutrition from Rouxbe where he had the opportunity to work with Chef Chad Sarno. He is in private practice and focuses on improving health through lifestyle modification. He has a special interest in the gastrointestinal microbiome and its effect on health and disease.


In addition to his clinical practice Dr. Howard is actively involved in the policy making side of organized medicine and currently serves as the speaker of the Florida Medical Association and is the chair of the state delegation to the American Medical Association where he plays an active role in the creation of national healthcare policy.


Dr. Howard is a highly motivating speaker and regularly engages the public and physicians on the importance of lifestyle as medicine, the science of epigenetics, and the importance of the gastrointestional microbiota. He also teaches private plant based nutrition cooking classes in his office which houses a functional kitchen and yoga studio.


Daniel Kapp MD '98

Dr. Daniel Kapp is a board certified plastic surgeon and the chief of plastic surgery at Palm Beach Gardens Medical Center. Dr. Kapp focuses on his practice on breast cancer reconstruction, complex soft tissue reconstruction, cutaneous oncologic surgery and cosmetic surgery of the body and face. Dr. Kapp is a founding partner of and advisory board member for MDLive one of the largest telemedicine companies in the United States.


He is a frequent speaker telemedicine and its applications, aesthetic facial rejuvenation and bioengineered skin substitutes. Dr. Kapp is a graduate of the University of Virginia College of Arts and Sciences and the University of South Florida College of Medicine. He completed his residency in plastic surgery at the Ohio State University.


Additionally, he served as the prestigious Anastasi Fellow in Plastic Surgery at the Boston University Medical Center. Dr. Kapp is a member of the Board of Directors of the Economic Council of the Palm Beaches and a member of the board of directors of the Center for Creative Education. He lives in Jupiter, FL with his wife and three beautiful children.



Dolores Lowe MD ’93

Dolores Lowe, MD is a dual USF alum and completed her BS at USF in 1989 and her medical degree in 1993. She completed her specialty training as Chief Resident in Family Medicine at a University of Iowa program in 1996 and practices adult medicine with an emphasis in Geriatrics in Tarpon Springs, FL.







 Rahul Mehra MD

Rahul Mehra, MD is the CEO and Chief Medical Officer of MehraVista Health, LLC . MehraVista Health is a national, Florida based healthcare organization specializing in employee wellness focusing specifically on the improvement of employee emotional health. Clients include large publically traded companies to small privately held not for profits. By background, Dr.Mehra is a Board Certified Child, Adolescent and Adult Psychiatrist. He is a 1992 graduate of the USF Morsani College of Medicine Department of Psychiatry residency program. Dr.Mehra is the first resident to be selected to the Alumni Board and a former Assistant Professor in the Department of Psychiatry at USF.




Jane Messina MD '88

Dr. Jane Messina completed her MD degree at USF in 1988. She also completed her residency in anatomic and clinical pathology and a fellowship in dermatopathology at USF. Dr. Messina joined the faculty in the Department of Pathology and Cell Biology at USF MCOM in Tampa in 1994, where she practiced for 20 years before moving to Moffitt Cancer Center.


She is currently Senior Member in the Departments of Anatomic Pathology and Cutaneous Oncology at Moffitt, and Professor of Oncologic Sciences, Pathology and Cell Biology, and Dermatology at USF. Her passions include teaching and mentoring of pathology and dermatology residents, as well as the dermatopathology fellow, and practicing within busy diagnostic services at both USF and Moffitt, which treats 1,900 new melanoma patients annually.


She has been director of the dermatopathology fellowship at USF since 2011. Her research interests include pathology of the sentinel node, biomarkers of prognosis in cutaneous melanoma, and etiology and treatment of Merkel cell carcinoma, and she has published over 130 papers in peer-reviewed journals.

Chris Pittman MD ’88

Chris Pittman, MD received his medical degree from the USF in 1988 and completed a diagnostic radiology residency at St. Louis University Medical Center followed by fellowships in both Interventional and Vascular Radiology at the University of California – San Diego Medical Center.


He is board-certified in Diagnostic Radiology, Vascular and Interventional Radiology, and Venous and Lymphatic Medicine. Dr. Pittman is Medical Director and CEO of Vein911®, practices minimally invasive vein care in the Tampa Bay Area and has been active in medical politics for over 25 years.


He is President, Florida Medical Association (FMA) Political Action Committee; Chair, FMA Advisory Committee on Health Care Information Technology; Vice-Chair, FMA Council on Medical Economics and Health Care Delivery Innovation; Member, Board of Governors of the FMA; AMA Alternate Delegate, representing the American College of Phlebology; Member, Board of Directors, American College of Phlebology Foundation; Past President, Hillsborough County Medical Association; Member, American College of Radiology, Society of Interventional Radiology, and Florida Radiological Society; Member, Board of Advisors, Auronexus, LLC and Automated Clinical Guidelines, LLC.


Elizabeth Sagatys MD ’03

Elizabeth Sagatys, MD received her medical degree from USF in 2003 and completed residency training at the USF College of Medicine Department of Pathology & Cell Biology in 2007. Following residency, she completed advanced training in Oncologic Surgical Pathology and Hematopathology at Moffitt Cancer Center. She is board certified in Anatomic Pathology, Clinical Pathology and Hematology (Pathology).


In 2009, she joined the faculty at Moffitt Cancer Center as an Assistant Member in the Department of Hematopathology and Laboratory Medicine and also obtained courtesy joint appointments as Assistant Professor in the Departments of Oncologic Sciences and Pathology & Cell Biology at the University of South Florida Morsani College of Medicine.



Kerry Thomas MD '08

Dr. Thomas is a 2008 graduate of the USF College of Medicine. She completed her residency in Diagnostic Radiology and body imaging fellowship from the University of South Florida Morsani College of Medicine.

Dr. Thomas is an Assistant Member in the Department of Diagnostic Imaging and Interventional Radiology at Moffitt Cancer Center in Tampa, FL. She is also an Assistant Professor of Radiology and Oncologic Sciences at the USF Morsani COM.




Rose Tillis, MD Candidate, Class of 2018

Rose Tillis, MD Candidate, Class of 2018, is the USF Morsani College of Medicine Student Council President. Rose graduated Summa Cum Laude from the University of Florida in 2014 with a Bachelors of Science in Biology and began medical school at USF Morsani College of Medicine later that year. While at MCOM, Rose has focused her research in Plastic and Reconstructive Surgery, securing a patent in a method of post-mastectomy reconstruction. During her term as Student Council President, she is actively working to improve access to mental health resources for current health professional students. Rose is an avid runner and triathlon participant, and plans to pursue a residency in Plastic Surgery.





Deborah Trehy MD ’78

Deborah Trehy, MD is a triple USF Alum. She completed her BA at USF in 1975, received her medical degree in 1978 and then did her residency here at USF’s Department of OB/GYN graduating in 1982.


She is a recently retired Obstetrician-Gynecologist after 30 years in practice. She presently volunteers at the BRIDGE Clinic and serves a leadership role with the Hillsborough County Medical Association. She is one of this year’s Delegates to the FMA from Hillsborough County.




Diane Duffy MD '89

Diane Duffy, MD has been active on the Board since 2009. She lives in North Carolina and is a dual USF graduate - completed her undergrad degree at USF in 1984 and received her medical degree from USF in 1989.


She practiced pediatrics in Burlington, NC for 16 years before joining the faculty at Elon University's Department of Physician Assistant Studies. She is currently the Director of Clinical Education at Elon. She enjoys serving on the MCOM Alumni Society Board as a way to give back to her alma mater and also to maintain connections with classmates and colleagues.