Our Providers
Our physicians and nurse practitioners bring a broad range of experience in cardiology, internal medicine, prevention, and patient-centered care.
Joseph A. Vassallo, M.D., F.A.C.C.
He earned his medical degree from the State University of New York at Buffalo and completed his residency at the New England Medical Center at Tufts University. He completed his cardiology training at the Hospital of the University of Pennsylvania. His areas of expertise include clinical cardiology, arrhythmia evaluation, and internal medicine.
Miriam L. Fishman, M.D., F.A.C.C.
Dr. Miriam Fishman is a non-invasive cardiologist with additional board certifications in echocardiography and nuclear cardiology. She has expertise in treatment of hypertension, hyperlipidemia, valvular heart disease, coronary artery disease and arrhythmia with a special interest in prevention. She is particularly interested in women’s heart disease across the age spectrum, from cardiovascular disease of pregnancy to cardio-oncology.
A native of the Washington DC area, Dr Fishman attended Yale University as an undergraduate. She attended New York University School of Medicine where she received an award for Humanism in Medicine, which reflects her style of practice today. She did her residency in internal medicine at Mount Sinai School of Medicine in New York City and returned to DC for her cardiology fellowship at George Washington.
Kenneth A. Merkatz, M.D., F.A.C.C.
Dr. Kenneth A. Merkatz is a board-certified cardiologist and a diplomate of the Certification Board of Nuclear Cardiology, with more than 30 years of experience in non-invasive cardiology, clinical cardiology, and patient-centered care. He is a graduate of Columbia University College of Physicians and Surgeons and also completed his undergraduate degree at Columbia University. He completed his cardiology training at University Hospitals of Cleveland and North Shore University Hospital.
Jiayi Wu, DNP, APRN, AGNP-C
Jiayi is a board-certified Adult-Gerontology Nurse Practitioner. She earned her Master of Nursing and Doctor of Nursing Practice degrees from the University of Maryland, Baltimore. She also holds a Bachelor of Science in Bioengineering from the University of Maryland, College Park.
Her clinical interests include chronic disease management and preventive medicine. She believes in treating her patients with compassion and individualized care. In her free time, she likes to travel, hike, and spend time with her family and dog.