Christopher Duke, MD is a second-generation physician and native Washingtonian. His parents practiced medicine in Washington for four decades. Chris has practiced internal medicine here for 30 years. He attended George Washington University for his undergraduate and medical degrees. He completed Internal Medicine training at Penn State University. Chris practices evidence-based medicine while emphasizing empathy for his patients and their families. He personally knows and refers patients to the many outstanding specialists in Washington. He is excited to team with his patients to optimize their health and enjoyment of life. He has taught medical students at George Washington as an associate professor of medicine. He has been recognized by Washingtonian Magazine as a “Top Doctor” including in 2022. Outside of work, he enjoys traveling with wife Lilian and children Jacqueline and James. He loves attending Notre Dame football games and spoiling his pugs- Mini and Rockne! LinkedIn https://www.linkedin.com/in/christopher-duke-md-1126314. Dr. Duke is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Rabson-Mendenhall Syndrome, Vitamin B12 Deficiency, Subacute Combined Degeneration, and Cellulitis.

Dr. Andrea D. Hulse-Johnson is an internist at Sibley Memorial Hospital. She provides outpatient primary care to adults for prevention guidance and chronic disease management. Dr. Hulse-Johnson is a Sibley Primary Care physician who practices out of Sibley Memorial Hospital’s Medical Building, suite 300. Dr. Hulse-Johnson earned her medical degree from A.T. Still University Kirksville College of Osteopathic Medicine. She completed a family practice residency at West Jersey Hospital – Virtua Health. Dr. Hulse is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, Hypertension, and Enlarged Liver.

Dr. Vera L. Sheen is a Johns Hopkins Community Physician practicing out of Sibley Primary Care located in Sibley Memorial Hospital’s Medical Building in Washington, D.C. She is affiliated with Georgetown University Hospital as well. Dr. Sheen has an expertise in internal medicine. Dr. Sheen earned her medical degree from University of Kentucky College of Medicine. She completed a residency in internal medicine at Barnes-Jewish Hospital. Dr. Sheen is rated as an Advanced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Vitamin D Deficiency, High Cholesterol, Vitamin B12 Deficiency Anemia, and Folate Deficiency.

Dr. Elliot Aleskow is an internist affiliated with Sibley Memorial Hospital and George Washington University Hospital. He has a private practice in Washington, D.C. Dr. Aleskow earned his medical degree at the University of Maryland School of Medicine. He completed a residency in internal medicine at George Washington University. Dr. Aleskow performs physical examinations, evaluates patients for their medical concerns and provides vaccinations for international travel. Dr. Aleskow has been repeatedly named a Top Doctor in Washingtonian Magazine and has been named a Super Doctor by Washington Post Magazine. Dr. Aleskow is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Infant Hyperglycemia, Familial Hypertension, Hypertension, and Glucocorticoid-Remediable Aldosteronism.

Darcy Hansen is a primary care provider, practicing in Internal Medicine in Washington, Washington, D.c.. Dr. Hansen is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Obesity in Children, Obesity, Food Allergy, and Vitamin D Deficiency.

Dr. Jeffrey Sherman is an internist affiliated with Sibley Memorial Hospital and George Washington University Hospital. He has a private practice in Washington, D.C. Dr. Sherman earned his medical degree from Icahn School of Medicine at Mount Sinai, where he also completed his internship. He completed a residency in internal medicine at Albert Einstein-Montefiore Medical Center, followed by a fellowship in rheumatology at the National Institutes of Health Clinical Center. Dr. Sherman was named a Regional Top Doctor in 2014 by Castle Connolly. Dr. Sherman is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Raynaud Phenomenon, Idiopathic Hypersomnia, Lactose Intolerance, and High Cholesterol.

Kristin Yamamoto is a primary care provider, practicing in Rheumatologist in Washington, Washington, D.c.. Dr. Yamamoto is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Sitosterolemia, Postmenopausal Osteoporosis, Osteoporosis, and High Cholesterol.

Dr. David M. Hansen is an internist affiliated with Sibley Memorial Hospital and Georgetown University Hospital. He practices out of Foxhall Internists in Washington, D.C. Dr. Hansen’s clinical interests range from preventive care to long-term management of chronic conditions, such as diabetes, hypertension and heart failure. Dr. Hansen earned his undergraduate degree from Harvard College and his medical degree from Johns Hopkins University School of Medicine. He completed a residency in internal medicine at Stanford University School of Medicine. Dr. Hansen previously served as clinical faculty of Stanford Medical School and practiced at the Stanford-affiliated Menlo Medical Clinic. Dr. Hansen has been named a Top Internist by Washingtonian magazine and Consumers’ Checkbook magazine. He has also been named one of the Best Doctors in America and a Super Doctor by the Washington Post magazine. Dr. Hansen is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Alcoholic Cirrhosis, High Cholesterol, Homocystinuria, and Methylmalonic Acidemia with Homocystinuria.

Dr. Lawrence E. Klein is an internist affiliated with Sibley Memorial Hospital; Johns Hopkins Hospital, where he holds a part-time faculty appointment; and Georgetown University Hospital, where he also holds a faculty appointment. He practices out of Foxhall Internists in Washington, D.C. Dr. Klein completed a joint M.D.-Ph.D. program at Johns Hopkins University School of Medicine, where he was elected into the AOA Medical Honor Society. He completed a residency in internal medicine at Strong Memorial Hospital of the University of Rochester, followed by a fellowship in internal medicine at Johns Hopkins Hospital. Dr. Klein was one of the country’s first Henry J. Kaiser Foundation fellows in internal medicine. He went on to serve as a full-time Johns Hopkins medical faculty member. Dr. Klein previously served as the president of the D.C. Society of Internal Medicine and the governor of the D.C. Chapter of the American College of Physicians. Dr. Klein has been repeatedly named a Top Doctor in Washingtonian magazine and Consumers’ Checkbook magazine, as well as named a Super Doctor in the Washington Post magazine and one of the Best Doctors in America. He was awarded the American College of Physicians John H. Maher Laureate Award in 2001 and inducted as a Master of the American College of Physicians in 2009. Dr. Klein has contributed to numerous publications and presentations, abstracts and posters, and lectures on various topics. Dr. Klein is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Chronic Lymphocytic Leukemia (CLL), Chronic B-Cell Leukemia (CBCL), Richter Syndrome, and Familial Hypertriglyceridemia.

Dr. Andrew N. Umhau is an internist affiliated with Sibley Memorial Hospital and Georgetown University Hospital. He practices out of Foxhall Internists in Washington, D.C. Dr. Umhau has an expertise in general internal medicine, with clinical interests in adolescent and young adult medicine, medical problems of pregnancy and cross-cultural issues. Dr. Umhau earned his undergraduate degree from Davidson College and his medical degree from Duke University. He completed a residency in internal medicine at Georgetown University, where he became chief resident. Dr. Umhau was named a Super Doctor by the Washington Post and has been named one of the Best Doctors in America. Castle Connolly named him a Top Doctor in the Washington, D.C. and Washington-Baltimore areas in 2012. Dr. Umhau also earned the 2009 Laureate Award by the American College of Physicians, Washington, D.C. chapter. Dr. Umhau is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are High Cholesterol, Recurrent Peripheral Facial Palsy, Facial Paralysis, and Bell's Palsy.

Theodore Li is a primary care provider, practicing in Internal Medicine in Washington, Washington, D.c.. Dr. Li is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Chronic Cough, Fainting, Hypothyroidism, and Obesity in Children.

Dr. John A. Dooley is an internist affiliated with Sibley Memorial Hospital and Georgetown University Hospital. He practices out of Foxhall Internists in Washington, D.C. Dr. Dooley earned his undergraduate degree from Harvard University and his medical degree from Columbia University College of Physicians and Surgeons, where he received the Robert Loeb Award for Excellence in Clinical Medicine. He completed a residency in internal medicine at Johns Hopkins University School of Medicine. Dr. Dooley previously practiced general internal medicine at the Veterans Affairs Medical Center. Dr. Dooley has been named a Top Doctor by Consumers’ Checkbook Magazine. Dr. Dooley is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are High Cholesterol, Pyomyositis, Familial Hypertension, and Hypertension.

William Condrell is a primary care provider, practicing in Family Medicine in Washington, Washington, D.c.. Dr. Condrell is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Attention Deficit Hyperactivity Disorder (ADHD), Erectile Dysfunction (ED), Persistent Genital Arousal Disorder, and Insomnia.

Sandra Delistathis is a primary care provider, practicing in Internal Medicine in Washington, Washington, D.c.. Dr. Delistathis is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Gilbert Syndrome, Postmenopausal Osteoporosis, Osteoporosis, and Folate Deficiency.

Dr. Marta A. Schneider is an internist affiliated with Sibley Memorial Hospital. She has a private practice in Washington, D.C. Dr. Schneider earned her medical degree from George Washington University School of Medicine. She completed a residency in internal medicine at St. Francis Hospital Medical Center. Dr. Schneider is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Rickets, Osteomalacia, Frequent or Urgent Urination, Enlarged Liver, and Ureteroscopy.

Dr. Collin D. Cullen is an internist affiliated with Sibley Memorial Hospital. He practices out of Cullen, Umosella, Cullen & Cullen in Bethesda, Md. Dr. Cullen earned his medical degree from Georgetown University School of Medicine. He completed a residency in obstetrics and gynecology at Geisinger Medical Center. Dr. Cullen has been named a Top MD by Consumers’ Checkbook Magazine, as well as a Top Family/General Practitioner by Washingtonian Magazine. Recent News Articles and Media Coverage The Brothers Cullen. Bethesda Magazine (January/February 2008). Dr. Cullen is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Tension Headache, Subacute Combined Degeneration, Cirrhosis, and Familial Combined Hyperlipidemia.

Dr. Alan R. Morrison is an internist affiliated with Sibley Memorial Hospital and Suburban Hospital. Dr. Morrison has a private practice in Washington, D.C. Dr. Morrison earned his undergraduate degree from the University of Maryland and his Doctor of Osteopathic Medicine degree at the University of Osteopathic Medicine and Health Sciences. He completed an internship in internal medicine at Philadelphia College of Osteopathic Medicine, followed by a residency in internal medicine at Johns Hopkins University School of Medicine. Dr. Morrison also completed a fellowship in adolescent and young adult medicine at Children’s National Medical Center. Dr. Morrison then joined the faculty at Nova Southeastern University and served as an assistant professor of medicine for almost five years. Dr. Morrison has been named a Top MD by Consumers’ Checkbook Magazine and Washingtonian Magazine. He is a fellow of the American College of Physicians. Dr. Morrison has presented at local and regional scientific conferences and has contributed to various publications. Dr. Morrison has also appeared in the media as a featured medical consultant. Dr. Morrison is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Campylobacter Infection, Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, and Hypertension.

Robert Enelow is a primary care provider, practicing in Internal Medicine in Washington, Washington, D.c.. Dr. Enelow is rated as an Advanced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Retinopathy Arteriosclerotic, High Cholesterol, Vitamin D Deficiency, and Folate Deficiency. Dr. Enelow is currently accepting new patients.

Nayo Wills is a primary care provider, practicing in Internal Medicine in Washington, Washington, D.c.. Dr. Wills is rated as an Advanced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Peripheral Neuropathy, Memory Loss, Premenstrual Syndrome, and Autosomal Recessive Hypotrichosis. Dr. Wills is currently accepting new patients.

Ali Safayan is a primary care provider, practicing in Internal Medicine in Washington, Washington, D.c.. Dr. Safayan is rated as an Advanced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Homocystinuria, Methylmalonic Acidemia with Homocystinuria, Inborn Amino Acid Metabolism Disorder, and Vitamin B12 Deficiency Anemia.