Greater Baltimore Medical Center (GBMC) - Baltimore, Maryland

James Mersey, MD
Chief, Division of Endocrinology and Medical Director

Dr. Mersey earned his medical degree and completed his residency at Johns Hopkins University. He is board-certified in Endocrinology and Internal Medicine.

Estelle Carter, BS, PA-C, CDE
Certified Diabetes Educator

Ms. Carter is a Clinical Educator at GBMC's Geckle Diabetes Center. Her responsibilities include patient management, clinical instruction, pump training and program development. Ms. Carter is a physician assistant with over 30 years experience. In NYC she was employed at Beth Israel Medical Center, Montefiore Hospital and Kings County/Downstate Medical Center. She has been employed in Maryland as a Physician Assistant at Maryland General Hospital, University of Maryland and GBMC.

She has over 20 years experience as a certified diabetes educator working in NYC as well as here in Maryland She is a graduate of Long Island University's Physician Assistant Program in Brooklyn, New York. Ms. Carter's commitment to diabetes education is fueled by her passion to assist patients with diabetes self-management education in an effort to aid them with a healthier lifestyle and preventing or delaying complications. Her quest is to educate patients, families, medical personnel or anyone interested in learning about diabetes and its co-morbidities.

Rebecca Denison, RD, LD, CDE, Doctor of Integrated Medicine
Certified Diabetes Dietitian Educator

Ms. Denison has been a Registered Dietitian for over 20 years and a Certified Diabetes Educator for almost 5 years. She is also a certified insulin pump trainer for the Animas Ping Pump and working toward her certification for the Minimed Pump and the Omnipod. She earned her Certificate of Training in Childhood and Adolescent weight Management in November of 2007. She provides professional and personal guidance and education to groups and individuals as they maneuver the intricacies of manipulating and improving their nutritional intake and changing their lifestyles to achieve the results they and their health care team desire. She empowers those she counsels to make decisions that blend with their own current life philosophy and abilities. She sees clients as young as 2 years of age to adulthood with a wide variety of diagnoses. Though the majority of her patients are diagnosed with Type 1 diabetes, Type 2 diabetes and Gestational Diabetes, she often sees patients with issues such as cholesterol (or lipid) management, failure to thrive, obesity, celiac disease and tube fed patients. The patients she sees often have multiple diagnoses and are not limited to only the above diagnoses. She enjoys a challenge and expanding her knowledge. However, if the patient is above her skill level, she will refer them to someone more appropriate for the patient's condition.  Her education includes a bachelor's degree in both nutrition and biology at Stephen F. Austin State University in Nacogdoches, Texas; a master's degree in nutrition at University of Texas in Austin and a doctoral degree in Integrative Medicine at Capitol University of Integrative Medicine in Washington, DC. Ms. Denison goes out in the community for diabetes screening at health fairs, supermarket tours, cooking classes and support groups in addition to seeing patients in the outpatient center at GBMC.

Joanne Dielmann, RD, LD ,CDE
Certified Diabetes Dietitian Educator

Ms. Dielmann graduated from the University of Delaware with a B.S in Nutrition and dietetics and completed a co-coordinated Master's Degree /Dietetic Internship program at the University of Alabama in Birmingham. She has spent the majority of her 25-year career span primarily working in outpatient and community nutrition. Before joining GBMC in 2003 she worked as an outpatient dietitian for many years at Franklin Square Hospital, Good Samaritan and Bon Secours Hospital Systems and developed nutrition programs for several sites including the Harford County Government, the Belair Athletic Club and Carefirst. She is a Certified Pump Trainer and Certified Diabetes Educator, specializing in renal nutrition.

Jennifer Muller, RD, LD, CDE
Certified Diabetes Dietitian Educator

Ms. Muller has been a registered and licensed dietitian with the Geckle Diabetes and Nutrition Center since June 2004. She gained her certification as a diabetes educator in 2007, followed by her certification as an Animas Pump trainer in 2009. She graduated from the University of Maryland College Park and completed her internship at Johns Hopkins Hospital.

Ms. Muller reaches out to the community through Health Fairs, Support Groups and fund raising events held through the American Diabetes Association, as well as seeing outpatients in the Center at GBMC. She has taken a special interest in helping to educate patients with Polycystic Ovarian Syndrome.

Kathy Noppinger, RN, MS, CDE
Certified Diabetes Educator

Ms. Noppinger received a BS degree from Towson University and a Master of Science degree, with a concentration on Diabetes Clinical Specialty, from University of Maryland. She received her certification in diabetes education in 2007 and her certification as an Animas Pump Trainer in 2009.
Her careers in diabetes management include residential nursing Camp Glyndon, provision of workshops as a consultant and volunteer with the American Diabetes Association, diabetes education fro Dr. Thaddeus Prout and pump training with Animus Corporation. She has been employed at Geckle Center since June 2004, where she provides not only education and management of Type 1 diabetes, Type 2 diabetes and Gestational Diabetes but also support groups and health fair screenings. She is an active member of the American Diabetes Association and the American Association of Diabetes Educators.