William M Cassidy

Vitals cannot verify whether or not this professional is currently practicing. We recommend that you attempt to contact the provider to verify their status. Please email us at if you have any additional information.


William M Cassidy is a Doctor primarily located in Ashburn, VA, with other offices in Ashburn, VA and Sterling, VA (and 5 other locations). Their specialties include Pediatrics. William M Cassidy is affiliated with Anne Arundel Medical Center.

Specialties & Expertise

William M Cassidy has the following 1 specialty.


A pediatrician is a doctor who specializes in the regular care of children, as well as the diagnosis and treatment of illness in children. Young patients are often more complicated to treat because they are still growing and developing.

While pediatricians may sub-specialize in specific therapy areas like oncology, surgery, ophthalmology, and anesthesiology, in general, pediatricians provide services like vaccinations, health exams, and treatment of common ailments and injuries. In addition, pediatricians are trained to handle the complex emotional and behavioral issues faced by children, especially during puberty.

Pediatricians normally see their patients from birth until the age of 18, although some may agree to treat patients into their early 20s, if requested.

Locations & Directions

43480 Yukon Dr
Ashburn, VA 20147

44050 Ashburn Shopping Plz
Ashburn, VA 20147

20 Pidgeon Hill Dr
Sterling, VA 20165

2579 John Milton Dr
Herndon, VA 20171

2946 Sleepy Hollow Rd
Falls Church, VA 22044

313 Park Ave
Falls Church, VA 22046

407 N Washington St
Falls Church, VA 22046

410 Maple Ave W
Vienna, VA 22180