Amir Hamrahian, M.D. is an endocrinologist with specialized experience in the treatment of adrenal and pituitary disorders. Dr. Hamrahian is located in Baltimore, Maryland. He received his medical degree from Hacettepe University in Ankara, Turkey, did his internal medicine residency at the University of North Dakota and completed his endocrinology fellowship at the Case Western Reserve University. Dr. Hamrahian is an Associate Professor of Medicine and has published more than 80 peer-reviewed articles, and has served as a co-author in developing guidelines for adrenal and pituitary disorders. He has presented at national and international conferences and has served as the principal investigator for a number of clinical research studies. Accolades received include Teacher of The Year award and Human Subject Research Annual Professional Excellence award in 2003 and 2011, respectively. Dr. Hamrahian has held roles including the chief of endocrinology in Abu Dhabi. Dr. Hamrahian is a co-director of the Adrenal Center. Dr. Hamrahian is highly rated in 32 conditions, according to our data. His top areas of expertise are Cushing's disease, Pituitary Tumor, Cushing's syndrome, Ectopic Cushing's syndrome, and Gamma Knife Radiosurgery.

Dr. Douglas Ball is an associate professor of medicine at the Johns Hopkins University School of Medicine. He holds a joint appointment in oncology. His areas of clinical expertise include diagnostic radiology, endocrine oncology, thyroid cancer and thyroid diseases. Dr. Ball earned his M.D. from the George Washington University School of Medicine. He completed his residency at the University of Pittsburgh-Presbyterian University Hospital and performed a fellowship in endocrinology and metabolism at Johns Hopkins. His research interests include medullary thyroid cancer, differentiated thyroid cancer and anaplastic thyroid cancer. Dr. Ball is highly rated in 20 conditions, according to our data. His top areas of expertise are Medullary Thyroid Carcinoma, Thyroid Cancer, Anaplastic Thyroid Cancer, Papillary Thyroid Cancer, and Thyroidectomy.

Dr. Dobs is presently an active clinical researcher in the field of endocrine gonadal function. She is particularly interested in new forms of male hormone replacement therapy and has published extensively in the area of hormonal changes with aging and chronic disease. Her clinical practice covers general endocrinology, with a focus on sex hormone disorders in both men and women. As Director of the Johns Hopkins Clinical Research Network, she oversees a multi-institutional consortium of hospitals in the mid-Atlantic states dedicated to facilitating clinical research through an academic-community hospital partnership. Dr. Dobs is highly rated in 9 conditions, according to our data. Her top areas of expertise are Hypogonadism, Eunuchoidism Familial Hypogonadotropic, Testicular Failure, Isolated Hypogonadotropic Hypogonadism, and Hormone Replacement Therapy (HRT).

Nicholas Argento, M.D. attended Georgetown University and graduated Magna Cum Laude with a BS in Biology, then the University of Maryland School of Medicine and graduated Cum Laude. He completed his residency in Internal Medicine and fellowship in Diabetes, Endocrine and Metabolism at the University of Maryland Medical System. He joined Maryland Endocrine full time in 1991. He has been the Medical Advisor to the diabetes program at Johns Hopkins Howard County Medical Center since 1995, and gives talks regularly to medical and patient audiences on diabetes. He has a strong interest in type 1 diabetes (T1D), and has extensive experience in utilizing insulin pumps and continuous glucose monitoring (CGM) to help patients safely achieve better blood glucose control. He has 4 publications in medical journals on different aspects of CGM use, and was co-author or contributor to multiple chapters in the 2013 American Diabetes Association book, Putting Your Patient On The Pump, 2nd edition. He has presented clinical research multiple times at the American Diabetes Association Scientific Sessions and other medical meetings, and has spoken to local, national, and international audiences on insulin pumps and the clinical application of CGM technology. He is very active on and lends medical support to and has written numerous articles for the T1DExchange website myglu.org, a website dedicated to outreach, research and engagement of and for the T1D community. For more information, visit marylandendocrine.com. Dr. Argento is highly rated in 6 conditions, according to our data. His top areas of expertise are Type 1 Diabetes (T1D), Hypothyroidism, Type 2 Diabetes (T2D), and Vitamin D Deficiency.

Dr. Aniket Sidhaye is an assistant professor of medicine and pediatrics at the Johns Hopkins University School of Medicine. His specific clinical interests are cystic fibrosis related endocrine disorders, type 1 diabetes mellitus particularly emerging adults with diabetes, thyroid disorders, metabolic bone disease, and management of hospitalized persons with diabetes. Dr. Sidhaye earned his M.D. from Northwestern University’s Feinberg School of Medicine. He completed his residency at Northwestern University. He performed a research fellowship in endocrinology and metabolism at Northwestern University and also performed fellowships in endocrinology and metabolism at Johns Hopkins. His research interests include CF related diabetes, bone health of CF patients after lung transplant, and the care of emerging adults with type 1 diabetes. In addition, he is a committed educator serving as an advisor in the medical school, co-director for the endocrine course for pre-clinical medical students, and program director for our endocrine fellowship. Dr. Sidhaye is highly rated in 3 conditions, according to our data. His top areas of expertise are Type B Insulin Resistance Syndrome, Type 1 Diabetes (T1D), Type 2 Diabetes (T2D), and Paget's Disease of Bone.

Roberto Salvatori is an Endocrinologist in Baltimore, Maryland. Dr. Salvatori is highly rated in 42 conditions, according to our data. His top areas of expertise are Growth Hormone Deficiency (GHD), Hypopituitarism, Pituitary Tumor, Cushing's syndrome, and Hormone Replacement Therapy (HRT).

Hillary Barnes is an Endocrinologist in Reisterstown, Maryland. Dr. Barnes has been practicing medicine for over 17 years is highly rated in 25 conditions, according to our data. Her top areas of expertise are Type 2 Diabetes (T2D), Osteoporosis, Postmenopausal Osteoporosis, and Diabetic Nephropathy.

Elizabeth Streeten is an Endocrinologist and a Medical Genetics provider in Baltimore, Maryland. Dr. Streeten is highly rated in 15 conditions, according to our data. Her top areas of expertise are Osteoporosis-Pseudoglioma Syndrome, Osteoporosis, Gaucher Disease, and Gaucher Disease Type 3.

Rozalina Mccoy is an Endocrinologist in Baltimore, Maryland. Dr. Mccoy has been practicing medicine for over 17 years is highly rated in 7 conditions, according to our data. Her top areas of expertise are Low Blood Sugar, Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, and Diabetic Hyperglycemic Hyperosmolar Syndrome.

Kashif Munir is an Endocrinologist in Baltimore, Maryland. Dr. Munir is highly rated in 45 conditions, according to our data. His top areas of expertise are Type 2 Diabetes (T2D), Thyroid Cancer, Thyroid Storm, Pituitary Tumor, and Thyroidectomy.

David S. Cooper, MD, MACP is a graduate of the Tufts University School of Medicine and completed his endocrinology training at Massachusetts General Hospital and Harvard Medical School. He is currently Professor of Medicine and Radiology at the Johns Hopkins University School of Medicine and Professor of International Health at the Johns Hopkins Bloomberg School of Public Health. He is one of the editors of the iconic textbook on thyroid disease, Werner and Ingbar’s The Thyroid, and he co-edits two other textbooks: Medical Management of Thyroid Disease and Thyroid Cancer. He is also the co-author of a book for patients with thyroid disease entitled Your Thyroid: A Home Reference. He is the past Chair of the Subspecialty Board for Endocrinology, Diabetes, and Metabolism of the American Board of Internal Medicine. He is an Editor-in-Chief for Endocrinology at Up-to-Date, and he has served as the Chair of the Endocrine Society’s annual Board Review Course. Dr. Cooper was the Chair of the American Thyroid Association’s (ATA) 2006 and 2009 task forces that first drafted clinical practice guidelines for the management of thyroid nodules and thyroid cancer. He also served on ATA sponsored task forces that promulgated guidelines for the management of hypothyroidism and for the management of hyperthyroidism. He is the past Treasurer and past President of the ATA, and the recipient of the ATA’s Distinguished Service Award, its Paul Starr Award, and the Lewis Braverman Lectureship Award. He is also the recipient of the Distinction in Endocrinology Award given by the American Association of Clinical Endocrinologists, as well as the Endocrine Society’s Outstanding Scholarly Physician Laureate Award and the Outstanding Educator Laureate Award. Dr. Cooper is highly rated in 11 conditions, according to our data. His top areas of expertise are Thyroid Cancer, Graves Disease, Follicular Thyroid Cancer, Thyroidectomy, and Hormone Replacement Therapy (HRT).

Heidi Karon is an Endocrinologist in Columbia, Maryland. Dr. Karon is highly rated in 8 conditions, according to our data. Her top areas of expertise are Hypothyroidism, Thyroid Storm, Hyperthyroidism, and Type 1 Diabetes (T1D).

Dr. Rita Kalyani is a Professor of Medicine at Johns Hopkins School of Medicine. She graduated with an undergraduate degree from Harvard College and completed her medical degree, residency, and fellowship at Johns Hopkins. She also obtained a Masters in Health Science degree in Clinical Investigation from the Johns Hopkins Bloomberg School of Public Health. As a NIH-funded clinician scientist, Dr. Kalyani has authored over 175 peer-reviewed publications and built a research program focused on understanding the factors leading to development of diabetes complications, particularly in high-risk populations. She has conducted epidemiological and patient-oriented research that has led to fundamental discoveries regarding the development of skeletal muscle loss, physical disability, and frailty in diabetes. She has also spearheaded studies investigating sex differences in cardiovascular disease and diabetes which have influenced primary prevention guidelines. Dr. Kalyani launched the Diabetes Management Service for Johns Hopkins’ Total Pancreatectomy Islet Auto Transplant Program in 2011. She is the co-founder of the Johns Hopkins Diabetes POC-IT Guide for healthcare professionals. She is also the founder and past Editor-in-Chief of the Johns Hopkins Patient Website to Diabetes. Dr. Kalyani has been the Chief Scientific and Medical Officer of the American Diabetes Association since 2025. She previously served as President of Medicine & Science on the ADA's National Board of Directors. She continues to have a clinical practice as an adult endocrinologist. Dr. Kalyani is highly rated in 7 conditions, according to our data. Her top areas of expertise are Seasonal Affective Disorder (SAD), Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Pancreatectomy, and Islet Cell Transplantation.

Dr. Donner's clinical and research interests have focused on the prevention of complications in patients with type 1 and 2 diabetes. For 6 years, he was the Associate Medical Director of the Joslin Diabetes Center affiliate at the University of Maryland, and then Medical Director from 2004 - 2010. After joining the faculty at Johns Hopkins University in 2010, his clinical and research interests became fully dedicated to diabetes. He became the Director of The Johns Hopkins Diabetes Center in 2011. He has been a clinical investigator in a number of NIH- and industry-funded diabetes research trials. Dr. Donner was a co-PI in the NIH-funded Veterans Affairs Implantable Insulin Pump Study, a Co-PI on the NIDDK-funded Diabetes Control and Complications Trial / Epidemiology of Diabetes Intervention and Complications (DCCT / EDIC) Study for 16 years, and Co-PI for the Bypass Angioplasty Revascularization Investigation 2 Diabetes (BARI 2D) for 7 years. Recently, he has served as PI for the Durable-response therapy Evaluation For Early or New-onset type 1 Diabetes (DEFEND-1). Dr. Donner is currently collaborating with Dr. Abdel Hamad in Immunology on preventing B-regulatory cell apoptosis using a novel monoclonal antibody targeting the presumptive apoptotic factor. This antibody prevents the development of type 1 diabetes in non obese diabetic mice. Dr. Donner is the PI for Johns Hopkins for TrialNet, a multicenter, international consortium of investigators studying ways to prevent Type 1 diabetes and preserve insulin secretion in individuals with newly diagnosed Type 1 diabetes. He is also a PI for a study investigating FIAsp, a faster-acting insulin aspart in subjects with type 1 diabetes, and is working with investigators at the Johns Hopkins School of Engineering on an implantable insulin pump which delivers insulin intravenously. Dr. Donner is highly rated in 5 conditions, according to our data. His top areas of expertise are Type 1 Diabetes (T1D), Diabetic Nephropathy, Type 2 Diabetes (T2D), and Maturity Onset Diabetes of the Young.

Dr. Mathioudakis, an endocrinologist and researcher, has a strong focus on diabetes management and patient care, recognized through awards like the Baltimore Top Doc. He has contributed significantly to diabetes research, authoring over 150 publications and participating in the development of consensus guidelines in the field. His studies have offered valuable insights into using health informatics for diabetes prevention and management. After graduating from the Johns Hopkins University School of Medicine and completing his training in Internal Medicine and a fellowship in Endocrinology, Diabetes, & Metabolism, Dr. Mathioudakis joined the faculty in the Division of Endocrinology, Diabetes & Metabolism in 2012. He earned a Master of Health Science in clinical investigation in 2015 and was the Clinical Director of the Division of Endocrinology from 2016 to 2021. Currently, he co-directs the Baltimore Metropolitan Diabetes Regional Partnership, focusing on improving access to diabetes prevention and management programs. As a physician-scientist, Dr. Mathioudakis leads multiple research studies funded by the NIH, private philanthropic organizations (Helmsley Charitable Trust), non-profit organizations (Breakthrough T1D), and industry. His research focuses on the effectiveness of automated diabetes prevention programs and strategies to reduce racial disparities in diabetes technology access. He also collaborates nationally to enhance care for people with type 1 diabetes. Holding a joint appointment in the Division of Biomedical Informatics and Data Science, Dr. Mathioudakis integrates machine learning and AI in diabetes research. He has served on the national Epic Endocrinology Specialty Steering Board and chaired the Type 2 Diabetes Prognostics Working Group for the Precision Medicine Diabetes Initiative. Committed to education, he frequently lectures on endocrinology, epidemiology, and health informatics. Dr. Mathioudakis is highly rated in 4 conditions, according to our data. His top areas of expertise are Type 2 Diabetes (T2D), Type 1 Diabetes (T1D), Low Blood Sugar, Maturity Onset Diabetes of the Young, and Pancreaticoduodenectomy.

Dr. Paul Ladenson is a professor of medicine at the Johns Hopkins University School of Medicine. He is also a professor of oncology; pathology; and radiology and radiological science. His areas of clinical expertise include Thyroid diseases, Endocrine & Metabolic disorders. Dr. Ladenson is the John Eager Howard Professor of Endocrinology and Metabolism. He earned his M.D. from Harvard Medical School. He completed his residency and performed a fellowship in endocrinology, diabetes and metabolism at Massachusetts General Hospital. Dr. Ladenson's research interests include cardiac actions of thyroid hormone, thyroid cancer and thyroid hormone analogs. He was recognized with the Lewis E. Braverman Lectureship Award at the 82nd Annual Meeting of the American Thyroid Association (ATA) in 2012. Dr. Ladenson is highly rated in 1 condition, according to our data. His top areas of expertise are Thyroid Nodule, Secondary Adrenal Insufficiency, Neuroendocrine Tumor, Non-Alcoholic Fatty Liver Disease, and Thyroidectomy.

Shadi Barakat is an Endocrinologist in Baltimore, Maryland. Dr. Barakat has been practicing medicine for over 17 years is highly rated in 26 conditions, according to our data. His top areas of expertise are Type 2 Diabetes (T2D), Toxic Nodular Goiter, Thyroid Cancer, and Thyroid Storm.

Hilary Whitlatch is an Endocrinologist in Baltimore, Maryland. Dr. Whitlatch is highly rated in 25 conditions, according to our data. Her top areas of expertise are Rabson-Mendenhall Syndrome, Hyperparathyroidism, Osteoporosis, and Postmenopausal Osteoporosis.

Cristian Vilcu is an Endocrinologist in Baltimore, Maryland. Dr. Vilcu is highly rated in 23 conditions, according to our data. His top areas of expertise are Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), Adrenal Gland Adenoma, and Hypothyroidism.

Javzandulam Natsag is an Endocrinologist in Columbia, Maryland. Dr. Natsag is highly rated in 17 conditions, according to our data. Her top areas of expertise are Graves Disease, Thyroid Storm, Maturity Onset Diabetes of the Young, and Familial Hypocalciuric Hypercalcemia Type 1.

Nisha Abraham is an Endocrinologist in Hanover, Maryland. Dr. Abraham is highly rated in 17 conditions, according to our data. Her top areas of expertise are Type 2 Diabetes (T2D), Thyroid Nodule, Diabetic Neuropathy, and Diabetic Nephropathy.

Rana Malek is an Endocrinologist in Baltimore, Maryland. Dr. Malek is highly rated in 14 conditions, according to our data. Her top areas of expertise are Type 2 Diabetes (T2D), Addison's Disease, Type 1 Diabetes (T1D), Maturity Onset Diabetes of the Young, and Thyroidectomy.

Henry Fein is an Endocrinologist in Baltimore, Maryland. Dr. Fein is highly rated in 11 conditions, according to our data. His top areas of expertise are Thyroid Storm, Graves Disease, Follicular Thyroid Cancer, Thyroid Cancer, and Thyroidectomy.

William Valente is an Endocrinologist in Baltimore, Maryland. Dr. Valente is highly rated in 11 conditions, according to our data. His top areas of expertise are Graves Disease, Thyroid Storm, Toxic Nodular Goiter, and Thyroid Nodule.

David Levitt is an Endocrinologist in Hanover, Maryland. Dr. Levitt is highly rated in 11 conditions, according to our data. His top areas of expertise are Type 1 Diabetes (T1D), Type 2 Diabetes (T2D), Hypothyroidism, and Hyperthyroidism.