Dr. Sun Y. Chen

Dr. Stefan Loy Zimmerman is a Professor in the Johns Hopkins University School of Medicine in the Departments of Radiology and Medicine (Cardiology). He specializes in cardiothoracic imaging and is the Division Director of Diagnostic Imaging and Director of Cardiac Imaging. He is the program director for the Cardiothoracic Imaging Fellowship in Radiology. Dr. Zimmerman earned his medical degree from the University of Pennsylvania School of Medicine. He completed both a radiology residency and a cardiovascular imaging fellowship at the Hospital of the University of Pennsylvania. His research focuses on the use of CT and MR imaging in the diagnosis and management of cardiovascular diseases. He has particular interest in the use of cardiac imaging for management of arrhythmias, diagnosis and prognosis of arrhythmogenic right and left ventricular cardiomyopathy, and pulmonary hypertension. Dr. Zimmerman is rated as a Distinguished provider by MediFind in the treatment of Systemic Sclerosis (SSc). His top areas of expertise are Paroxysmal Supraventricular Tachycardia (PSVT), Alveolar Soft Part Sarcoma, Liposarcoma, Cardiac Ablation, and Transcatheter Aortic Valve Replacement (TAVR).

John Ruff is a Radiologist and a Neuroradiologist in Centreville, Virginia. Dr. Ruff is rated as a Distinguished provider by MediFind in the treatment of Systemic Sclerosis (SSc). His top areas of expertise are Pleurisy, Pleural Effusion, Pulmonary Fibrosis, Visceromegaly, and Bone Marrow Aspiration. Dr. Ruff is currently accepting new patients.

Daniel Overdeck is a Radiologist and a Neuroradiologist in Herndon, Virginia. Dr. Overdeck is rated as a Distinguished provider by MediFind in the treatment of Systemic Sclerosis (SSc). His top areas of expertise are Gallbladder Disease, Lung Nodules, Ascites, Pleurisy, and Bone Marrow Aspiration. Dr. Overdeck is currently accepting new patients.