Penn Medicine Provider
Internal Medicine
William Neal Duffy, MD
4.9
(589)
Sees patients age 18 and up
Penn Personalized Care - William Duffy, MD
Make an appointmentCall 610-576-7515

About me

  • Clinical Associate Professor of Medicine (Medicine Affiliates)

Education and training

  • Medical School: Georgetown University School of Medicine
  • Residency: Thomas Jefferson University Hospital

What my patients think about me

Average Rating
4.9

589 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.

June 2025
5.0
5.0
outstanding clinician
May 2025
5.0
5.0
friendly and knowledgeable doctor, thorough in his approach, and helpful in finding creative solutions to stay healthy
May 2025
5.0
5.0
dr. duffy is an excellent physician and i trust his judgment completely
May 2025
5.0
5.0
extremely knowledgeable and caring.

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

Qualifications and experience

Treatments and Conditions