Specialty Physicians at St. Mary’s

The Specialty Physicians suites in the Outpatient Pavilion include offices for our specialty physicians as well as exam and procedure rooms. 

MedStar Heart and Vascular Institute 

In partnership with the Cleveland Clinic

Flatau, ArthurArthur Flatau III, MD, Vascular Surgeon 

Dr. Arthur Flatau is available Monday through Thursday from 8 a.m. to 4:30 p.m. and Friday from 8 a.m. to 2 p.m.  He brings extensive experience in the care of vascular and lymphatic systems, offering care and treatment for varicose veins and venous disease,  abdominal aortic aneurysms, carotid occlusive disease, restricted blood flow, hemodialysis and peritoneal dialysis access, venous access for mediport and chemotherapy, lymphedema, diabetic foot infections, critical limp ischemia / limb salvage, and permanent pacemaker / generator changes. Specialty Physicians includes a Vascular Lab on-site for minimally-invasive procedures, which are available for some treatments.

Please call 240-434-4072 or click here to schedule an appointment with Dr. Flatau. Learn more about our vascular services and the MedStar Heart and Vascular Institute


MedStar St. Mary's Hospital

Yongxing Zhou, MD, PhD, Neurologist

Dr. Yongxing Zhou (pronounced “Joe”) sees patients on weekdays (except Tuesdays) from 9 a.m. to 4:30 p.m. Specializing in a wide range of neurological conditions with a subspecialty in epilepsy, Dr. Zhou believes in treating the patient as a whole person. He is board certified in neurology and joined the medical staff at MedStar St. Mary’s Hospital in 2018.

Please call 240-434-7929 to make an appointment with Dr. Zhou. Learn more about neurology services at MedStar St. Mary’s.




Nicholas Tapazoglou, MD, General & Bariatric Surgeon

Dr. Nicholas Tapazoglou is available from 8 a.m. to 4:30 p.m. daily. He is board certified in general surgery and is able to coordinate patient care through a wide range of specialty physicians available through the MedStar Health system. He offers care and treatment for various conditions, including abdominal wall/hernia, gallbladder, morbid obesity, skin and soft tissue, small intestine, spleen, stomach, surgical treatments of gastroesophageal reflux disorder (GERD) and thryroid.

Please call 240-434-4088 to schedule an appointment. Learn more about general surgery services at MedStar St. Mary's. 

Now Accepting
New Patients

Specialty Physicians at St. Mary's
MedStar St. Mary's Hospital Outpatient Pavilion
25500 Point Lookout Road
Leonardtown, MD 20650

Health Insurances Accepted:

  • Aetna
  • CareFirst Bluecross Blueshield
  • Humana Choice
  • Cigna
  • Coventry Health
  • Tricare
  • MedStar Family Choice
  • MedStar Select
  • United Health Care
  • Medicare