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Endocrinology Center: About Our Physicians
Physicians
Diabetes Education
Errol H. Rushovich, M.D.
Chief, Endocrinology
The Bone Health Center at Mercy
Errol H. Rushovich, M.D., Chief of Endocrinology, leads The Center for Endocrinology at Mercy. Board Certified in Endocrinology and Internal Medicine, he has a special interest in endocrine disorders, bone health, and preventative treatments. In addition, Dr. Rushovich is partnering with Kathy J. Helzlsouer, M.D., from The Prevention & Research Center at Mercy, to determine health care strategies for the prevention and treatment of avoidable diseases such as Type 2 diabetes.
Dr. Rushovich completed his residency at Mt. Sinai Hospital in Chicago and his fellowship training at the University of Michigan at Ann Arbor. Prior to coming to Baltimore, he directed a regional diabetes program and was Medical Director for a Diabetes Outreach Network covering 28 counties in Northern Michigan. While in Michigan, Dr. Rushovich held a faculty appointment at Michigan State University and was a member of the State's diabetes advisory panel.
William Valente, M.D., FACP
The Thyroid Center at Mercy
William Valente, M.D., FACP, of The Thyroid Center at Mercy, a division of The Center for Endocrinology at Mercy, received his medical degree from the University of Maryland School of Medicine and completed his Internal Medicine residency and Endocrinology and Metabolism fellowship at the University of Maryland Hospital. He completed a research fellowship in thyroid disorders at the National Institutes of Health and joined the clinical faculty at the University of Maryland, ultimately receiving a Clinical Professor appointment in the Department of Medicine. He also earned a Masters in Business Administration at The Johns Hopkins University.
Board Certified in Internal Medicine and Endocrinology and Metabolism, Dr. Valente has authored numerous publications and abstracts and has served as reviewer for the Journal of Clinical Endocrinology and Metabolism and Journal of Endocrinologic Investigation Thyroid. A recipient of numerous prestigious honors and awards, he is a member of the Endocrine Society, American Thyroid Association, and Baltimore City Medical Society, and a fellow in the American College of Physicians. He is president of Interthyr Research Foundation and remains active in clinical research on thyroid disorders.
Susan Gustavsson, RN, BSN, CDE
The Diabetes Center at Mercy
Susan Gustavsson, RN, BSN, CDE, is a Diabetes Nurse Educator who provides diabetes education in one-on-one and group sessions at The Diabetes Center at Mercy, a division of The Center for Endocrinology at Mercy. A Certified Diabetes Educator, Susan has vast experience in educating both inpatients and outpatients in diabetes management and has trained patients to use insulin pumps. A graduate of the University of Maryland at Baltimore with a degree in nursing, Susan is a member of the American Association of Diabetes Educators and Maryland Association of Diabetes Educators.
Sheila Matlak, RN, CPT, CDE
The Diabetes Center at Mercy
Sheila Matlak, RN, CPT, CDE, is a Registered Nurse and Certified Pump Trainer with vast experience in educating people about diabetes and the use of insulin pumps. A graduate of the Maryland General Hospital School of Nursing, Sheila is a member of the American Association of Diabetes Educators and Maryland Chapter of the AADE. A diabetes patient herself, Sheila is active in the volunteer sector for diabetes treatment and management.
Kelly O’Connor, RD, LDN, CDE
The Diabetes Center at Mercy
Kelly O’Connor, RD, LDN, CDE, is a Registered Dietitian with more than 20 years experience in nutrition counseling. A Certified Diabetes Educator, Kelly has assisted persons with diabetes in all aspects of meal planning, carbohydrate counting, and weight management in a variety of inpatient and outpatient settings. In addition, Kelly is a Certified Insulin Pump Trainer in the Baltimore area. She is a member of the American Association of Diabetes Educators and American Dietetic Association.
Now Accepting New Patients.
Most Insurances Accepted.
Please call for an appointment.
Bone Health and Thyroid: 410-332-9258
Diabetes: 410-332-9800
Tollfree: 1-800-MD-Mercy (1-800-636-3729)

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