TGH/TGMG - Nephrology

Dr. Lohrbach is a board-certified family medicine physician. She completed her undergraduate studies and medical degree at the University of Iowa and went on to complete a residency in family practice at Barberton Citizens Hospital in Barberton, OH.

Prior to transitioning to the outpatient family care setting, Dr. Lohrbach's experience includes missionary work at a 100-bed hospital in Zambia where she cared for a wide range of acute and chronic patients. She also worked as an emergency medicine physician in Ohio and most recently practiced at Petersburg Healthcare Alliance in Petersburg, VA.

Dr. Lohrbach is a member of the American Academy of Family Physicians.

Outside of the office, she enjoys spending time with family, traveling and running.

Dr. Lohrbach treats patients 18 years and older.

Dr. Walgampaya is a board-certified internal medicine physician. After completing his undergraduate studies in biology and pre-medicine, Dr. Walgampaya received his medical degree from St. George's University School of Medicine in Grenada, West Indies. He completed his internal medicine residency program at Seton Hall University/St. Michael's Medical Center in Newark, NJ. Previously, Dr. Walgampaya served as a medical director, chief medical officer and coroner, worked in an emergency room, and practiced both traditional and outpatient internal medicine. In his spare time, he enjoys volunteering, reading, traveling, gardening, cycling and running. Treats patients 18 years of age and older.

Dr. Castro is a board-certified family medicine physician. He attended medical school at Arizona College of Osteopathic Medicine in Glendale, AZ and completed his residency at Largo Medical Center in Largo, FL. Dr. Castro's professional research experience includes multiple studies at the University of Michigan Cancer Center in the diagnosis and treatment of head and neck cancer. Dr. Castro's special areas of focus include:
- osteopathic manipulation and trigger point injections
- sports medicine and joint infection
- dermatologic procedures

Dr. Castro is a member of the American College of Osteopathic Family Physicians (ACOFP).

Dr. Castro treats patients of all ages.

Susan Bingham, MSN, APRN, is a certified Family Nurse Practitioner with more than 20 years of experience in health care. She earned a bachelor of social work from University of South Florida and continued her education at University of Tampa, graduating with a master of science in nursing. Susan has worked in family practice at several facilities in Tampa, including centers for migrant and homeless health care.

She is certified in functional medicine and is a member of professional organizations including the Institute for Functional Medicine, American Association of Nurse Practitioners, Florida Nurse Practitioner Network and Tampa Bay Advanced Practice Nursing Council.

Dr. Farrales is a medical graduate of Manila Central University in the Philipines and completed his family practice residency at Howard University Hospital in Washington, D.C. He relocated to Florida after his residency and for over 15 years worked as a hospital-employed physician and a private practitioner in Ocala and Williston prior to joining the Tampa General Medical Group in January of 2013. His experience includes comprehensive, robust family care practice delivery in rural health clinic settings and excellent treatment of patients from all groups and diverse backgrounds. Dr. Farrales is board certified by the American Board of Family Practice and is a member in good standing of the American Academy of Family Physicians.

Dr. Farrales treats patients of all ages.
Dr. Farrales is recognized by the NCQA Diabetes Recognition Program.

Dr. Gadea is a board-certified internal medicine physician. He completed his undergraduate degree in biology at the University of South Florida in Tampa, FL. Dr. Gadea went on to complete his medical degree in osteopathic medicine at Nova-Southeastern College of Osteopathic Medicine in Davie, FL and an internal medicine residency at the Philadelphia College of Osteopathic Medicine in Philadelphia, PA.

Dr. Gadea has practiced as a primary care physician in the Tampa Bay area since 1998, providing care for adult and geriatric patients. For over six years, he served as a medical director for a private/public collaboration between the Florida Agency for Health Care Administration (AHCA) and Pfizer pharmaceutical company leading a disease management program specifically designed to help a large group of patients suffering from chronic medical conditions such as congestive heart failure and diabetes to better understand their medical conditions and health needs in order to better care for themselves and improve their quality of life.

Dr. Gadea's professional interests include individualized diabetes care, hypertension, chronic obstructive pulmonary disease and hyperlipidemia. He focuses on preventive health and patient education, and encourages his patients to take an active part in their healthcare plan.

Dr. Gadea has received numerous 'Patients Choice Awards' and was recently recognized as one of 'America's Best Physicians' by the National Consumer Advisory Board. He is a member of the American Osteopathic Association and has received recognition from the National Committee for Quality Assurance for diabetes care. He is fluent in English and Spanish.

Outside of the office, Dr. Gadea enjoys exercising, fishing and travelling with his family.

Dr. Ashish Singhal is a fellowship-trained multi-organ transplant surgeon with an affinity for treating patients with end-stage liver diseases and liver cancer and specializes in liver transplantation, liver resection, and living-donor liver transplantation.

Prior to joining Tampa General Hospital, Dr. Singhal served as a senior consultant surgeon at Fortis Hospitals, India. Dr. Singhal brings a wide range of experience and knowledge of the complex living-donor liver transplantation procedure.

Dr. Singhal's extensive experience includes working as an attending surgeon in the Division of Abdominal Organ Transplantation and Hepatobiliary Surgery at Allegheny General Hospital in Pittsburgh. He spent two years as a consultant surgeon in the Division of Liver Transplantation and Hepatobiliary Surgery at Fortis Hospital in Mohali, India, after being an assistant professor of surgery at the University of Cincinnati Medical Center.

In addition to transplantation, Dr. Singhal treats patients with liver disease, cancer of the liver, gallbladder, bile ducts, and other cancers that spread to the liver from other organs. He has an unparalleled commitment to working with patients in complex health circumstances and providing high-quality care to improve the quality of life of patients.

Dr. Singhal is credited with several publications, book chapters, presentations, abstracts, and journal reviews in areas of his expertise. Affiliated with the American Society of Transplant Surgeons and numerous professional organizations, Dr. Singhal has served as a committee member for many professional organizations too. His research interests include living donor liver transplantation, liver cancer, liver regeneration, and transplant immunology/pharmacology.