Our Team - Diabetes and Nutrition Center

Meena Khan, MDMeena A. Khan, MD
Medical Director, Geckle Diabetes and Nutrition Center

Dr. Khan received her Bachelor of Science degree from the University of Virginia and her medical degree from the University of Maryland. While at the University of Maryland, she was elected to the Alpha Omega Alpha honor society by the School of Medicine. Dr. Khan completed a residency in internal medicine at the University of Chicago and an endocrinology fellowship at the University of Maryland in Baltimore. She is Board Certified in Endocrinology as well as Internal Medicine. Dr. Khan is interested in all aspects of endocrinology, including thyroid disease, osteoporosis, and particularly diabetes, and served as a member of the former Joslin Diabetes Center at the University of Maryland, Baltimore. She enjoys working with the challenges of diabetes and brings a wealth of diabetes knowledge and experience to the Geckle Diabetes and Nutrition Center.

Ellen Wallace, BSN, RN, CDEEllen M. Wallace, BSN, RN, CDE
Clinical Program Manager, Geckle Diabetes and Nutrition Center

Ellen earned a Bachelor of Science degree in Nursing from the University of Maryland. She began her career in Intensive Care nursing, earning certification as a Critical Care nurse (CCRN) and moved on to become a Cardiovascular Nurse Educator before beginning her Diabetes experience in 2005. She received Certification in Diabetes Education (CDE) in 2008 and served as Outpatient Program Coordinator at a local Baltimore hospital from 2006 to 2013. Providing both inpatient and outpatient diabetes education has given Ellen a passion for supporting patients at all levels of care. Having recently worked as a Local Care Nurse Coordinator for a Patient-Centered Medical Home program, Ellen gained valuable experience in the patient-centered approach to healthcare. She is a professional member of the American Diabetes Association (ADA), the American Association of Diabetes Educators and the Maryland Association of Diabetes Educators. Her role at GBMC includes maintaining the ADA program certification of the Geckle Center, providing both inpatient and outpatient education; continuing the expansion of the Geckle Center into the community; supporting nursing education and overseeing the day-to-day operations of the Geckle Center programs.

Rebecca Denison, RD, LD, CDE, Doctor of Integrated MedicineRebecca Denison, RD, LDN, CDE, Doctor of Integrated Medicine

Becca has been a Registered Dietitian for over 25 years and a Certified Diabetes Educator for 10 years. She earned her Certificate of Training in Childhood and Adolescent Weight Management from the Academy of Nutrition and Dietetics in November of 2007. Becca provides professional and personal guidance and education to groups and individuals as they maneuver the challenges of improving their nutritional intake to achieve the results they and their healthcare team desire. She empowers people to make decisions that blend with their life philosophy and abilities. Becca sees clients as young as 2 years of age to adulthood with a wide variety of diagnoses. Though the majority of her patients have diabetes, she also meets with people who have nutrition-related issues. Becca enjoys a challenge and expanding her knowledge. Her education includes a Bachelor of Science degree in Food Service, Nutrition and Dietetics and Biology, Stephen F. Austin State University, Nacogdoches, Texas; a Master of Science degree in Nutrition and Psychology, University of Texas, Austin, Texas, and a Doctoral degree in Integrative Medicine from Capitol University of Integrative Medicine in Washington, DC.

Joanne Dielmann, RD, LD ,CDEJoanne Dielmann, RD, LDN,CDE

Joanne graduated from the University of Delaware with a Bachelor of Science degree in Nutrition and Dietetics and completed a coordinated Master's level/Dietetic Internship program at the University of Alabama in Birmingham. She has spent the majority of her 30-year career span primarily working in outpatient and community nutrition settings. Before joining GBMC in 2003, Joanne worked as an outpatient dietitian for many years at other Baltimore area hospitals. She has developed nutrition education programs for several local and regional sites, including the Harford County Government, the Belair Athletic Club, and Carefirst. Joanne is a member of the Academy of Nutrition and Dietetics and enjoys working with a variety of diabetes- and nutrition-related conditions, particularly renal (kidney) nutrition.

Catherine Genthner, MAS, RD, LDN, CDECatherine Genthner, MAS, RD, LDN, CDE

Catherine completed her Bachelor of Arts degree with a major in Nutrition at St. Scholastica's College in Manila, the Philippines, and a general dietetic internship at Beth Israel Hospital in Boston. She also earned a Master of Administrative Science at the School of Continuing Studies of Johns Hopkins University, Baltimore. Catherine has extensive experience in clinical nutrition management, including positions as a chief clinical dietitian and district support dietitian for Sodexo, a food service management company, and working in acute care hospitals and long term care, including patients on dialysis. She led efforts to obtain education recognition from the American Diabetes Association for the diabetes education program at another Baltimore hospital and she also has experience in the diabetes industry as an educator for an insulin manufacturer. Catherine has a Certificate in Weight Management Training for Adults from the Academy of Nutrition and Dietetics and has a strong interest in weight management. She is a past president of the Maryland Dietetic Association, after which she served as Chair of the Board of Dietetic Practice for the state of Maryland. Catherine is a recipient of the Recognized Young Dietitian award from the Maryland Dietetic Association, and a Volunteer of the Year award from the American Heart Association in Maryland. She is a lifelong member of the Academy of Nutrition and Dietetics and its diabetes specialty practice group, Diabetes Care and Education. She is also a member of the American Association of Diabetes Educators and the American Diabetes Association.


Tara Hegberg - Practice Coordinator
Maha Tariq - Medical Secretary
Greater Baltimore Medical Center | 6701 North Charles Street | Baltimore, MD 21204 | (443) 849-2000 | TTY (800) 735-2258
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