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
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

431 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.

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.
January 2026
she is a great doctor.
January 2026
dr. mcwilliams always provides such great care to my children. we never feel rushed at our appointments. she takes the time to talk with my children as well as answer my questions i have.
December 2025
dr. mcwilliams was patient and thorough

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