Cathryn A. McWilliams, MD, FAAP
General Pediatrics
Accepting new patients
Sees newborns through age 18
PennCare for Kids Limerick
View 1 additional location
Make an appointmentCall 610-495-2310
Headshot of Cathryn A. McWilliams, MD, FAAP
Penn Medicine Provider

About me

Education and training

  • Medical School: Temple University School of Medicine
  • Residency: Walter Reed Military Medical Center

What my patients think about me

Average Rating

439 reviews

Comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Penn Medicine.

February 2026
i absolutely love dr mcwilliams and so do many people i know
February 2026
dr. mcwilliams is an excellent doctor who truly cares about her patients along with providing helpful resources and tips for parents.
February 2026
she is very informative
January 2026
dr. mcwilliams is simply the best. she genuinely cares about each child and has always been exceptional at keeping us informed and accurately diagnosing situations-even when the news isn't what we hope to hear.

Insurance accepted

My Locations

Penn Medicine hospital privileges

  • Hospital of the University of Pennsylvania: On the medical staff, but does not have privileges to treat patients in the hospital.
Dr. McWilliams is a Penn Medicine physician.

Qualifications and experience

Treatments and Conditions