Dr. Dennis A. Cullen is an internist affiliated with Sibley Memorial Hospital. He practices out of Cullen, Umosella, Cullen & Cullen in Bethesda, Md. and Oxon Hill, Md. Dr. Cullen earned his medical degree from Georgetown University School of Medicine. He completed a residency in internal medicine at Georgetown University Hospital. Dr. Cullen has been named a Top MD by Consumers’ Checkbook Magazine, as well as a Top Family/General Practitioner and a Top Internist by Washingtonian Magazine. Recent News Articles and Media Coverage The Brothers Cullen. Bethesda Magazine (January/February 2008). Dr. Cullen is rated as an Advanced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Multiple Carboxylase Deficiency, Vitamin B12 Deficiency Anemia, Folate Deficiency, and Subacute Combined Degeneration.

Dr. Jose A. Quiros is an internist affiliated with Sibley Memorial Hospital and Suburban Hospital. He has a private practice in Bethesda, Md. Dr. Quiros earned his medical degree from the Universidad Nacional Mayor de San Marcos. He completed an internship and residency in internal medicine at Georgetown University Hospital. Dr. Quiros has been named a Top Doctor by Washingtonian magazine. Dr. Quiros is rated as an Advanced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Glossitis, Pernicious Anemia, High Cholesterol, and Vitamin B12 Deficiency.

Mark Goldstein is a Hematologist Oncology provider in Bethesda, Maryland. Dr. Goldstein is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Childhood Iron Deficiency Anemia, Anal Cancer, Myelodysplastic Syndrome (MDS), and Pleuropulmonary Blastoma.

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.

Laura Brown, M.D., practices internal medicine at Johns Hopkins Community Physicians North Bethesda. She received her medical degree from Harvard Medical School, and also completed her residency in internal medicine at Bellevue Hospital Center. Dr. Brown is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are High Cholesterol, Familial Combined Hyperlipidemia, Xanthoma, and Cirrhosis.

Satish Angra is a primary care provider, practicing in Family Medicine and Internal Medicine in Silver Spring, Maryland. Dr. Angra is rated as a Distinguished provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Type 2 Diabetes (T2D), Vitamin D Deficiency, Multiple Carboxylase Deficiency, and Folate Deficiency. Dr. Angra is currently accepting new patients.

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.

"Dr. Ari D. Fishman is a hematologist affiliated with Sibley Memorial Hospital, Holy Cross Hospital and George Washington University Hospital, where he serves as an assistant professor of medicine for the School of Medicine. He practices out of Maryland Oncology and Hematology, located in Wheaton, Maryland and Silver Spring, Maryland. Dr. Fishman earned his medical degree from Sackler School of Medicine. He completed a residency in internal medicine at the Beth Israel Medical Center, followed by a fellowship in hematology and oncology at the Montefiore Medical Center. Dr. Fishman previously worked at Washington Oncology Hematology Center, located in Washington, D.C. and Chevy Chase, Maryland. Dr. Fishman has been named a Top Doctor in Hematology and Oncology by Washingtonian Magazine and a Top Doctor by Consumers’ Checkbook magazine. Dr. Fishman is a member of the American College of Physicians and the American Society of Clinical Oncology. Dr. Fishman has contributed to numerous publications. Selected Publications Fishman AD, Hoffman A, Volterra F, Frymus M, Gentilluci M. ""Intracaval and intracardiac metastatic nonseminomatous germ cell tumor: a rare cause of hemolytic anemia and thrombocytopenia."" Cancer Invest. 2002;20(7-8):996-1001.". Dr. Fishman is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Schnitzler Syndrome, Monoclonal Gammopathy of Undetermined Significance (MGUS), Myelodysplastic Syndrome (MDS), and Childhood Iron Deficiency Anemia.

Robert Clark is a primary care provider, practicing in Internal Medicine in Bethesda,, Maryland. Dr. Clark is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Postmenopausal Osteoporosis, Osteoporosis, Richter Syndrome, Colonoscopy, and Endoscopy.

Nicholas Farrell is a Hematologist Oncology provider in Bethesda, Maryland. Dr. Farrell is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. His top areas of expertise are Lung Cancer, Childhood Iron Deficiency Anemia, Pleuropulmonary Blastoma, and Iron Deficiency Anemia.

Anuradha Arun is a primary care provider, practicing in Family Medicine in Silver Spring, Maryland. Dr. Arun is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Sitosterolemia, Vitamin D Deficiency, High Cholesterol, and Glucocorticoid-Remediable Aldosteronism.

Kathryn Kelly is a primary care provider, practicing in Family Medicine in Silver Spring, Maryland. Dr. Kelly is rated as an Experienced provider by MediFind in the treatment of Subacute Combined Degeneration. Her top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Hypertension, Familial Hypertension, Gastrostomy, and Endoscopy.

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.