Dr. William Cassidy

  • Pediatrics Ashburn, VA

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.


Dr. William 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. Dr. Cassidy is affiliated with Anne Arundel Medical Center, Inova Alexandria Hospital and Inova Fairfax Hospital. They speak English.


Find out the languages this doctor/ or staff may speak.

Specialties & Expertise

Dr. William Cassidy has the following 1 area of expertise, 1 specialty and 1 board certification.


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.


See areas of expertise for treating specific conditions, procedures and surgeries for this doctor.

Board Certification

See the board certifications this doctor has received. Board certifications provide confidence that this doctor meets the nationally recognized standards for education, knowledge and experience.

Locations & Directions

44050 Ashburn Shopping Plz
Ashburn, VA 20147

43480 Yukon Dr
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

Nearby Doctors

Dr. William Cassidy is similar to these 3 Doctors near Ashburn, VA.