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William Duffy, MD

William Duffy, MD Physician

Clinical Assistant Professor of Medicine

Dr. Duffy is a Penn Medicine employed physician.

This Provider Is Not Accepting New Patients. View Alternate Providers.

Clinical Specialties


  • Medicine
    • Internal Medicine

Programs & Centers:

Board Certification:

  • Internal Medicine, 1996

Practice Locations and Appointments

Insurance Accepted

  • Aetna US Healthcare
  • Cigna
  • Cigna HealthSpring
  • CVS Health
  • Devon Health Services (Americare)
  • Gateway Health Plan
  • Geisinger Health Plan
  • HealthAmerica / HealthAssurance, a Coventry Plan
  • HealthPartners
  • HealthPartners Medicare
  • HealthSmart
  • Highmark Blue Shield
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana / Choicecare
  • Independence Blue Cross (Keystone East)
  • Intergroup
  • Keystone First
  • Multiplan
  • NJ Medicaid
  • NJ Qualcare
  • Oxford Health Plan
  • PA Medicaid
  • PA Medicare
  • Preferred Health Care/LGH
  • Rail Road Medicare / Palmetto GBA
  • Remedy Partners at Penn Medicine
  • Tricare
  • United Healthcare
  • UnitedHealthcare Community Plan
  • US Family Health Plan

Education and Training

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


American College Of Lifestyle Medicine, National National Hockey League Team Physicians Society, National NFL Physician's Society, National The Obesity Society, National

Hospital Affiliation

Dr. Duffy is a Penn Medicine employed physician.

Hospital Privileges:

  • Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
  • Pennsylvania Hospital: Has privileges to treat patients in the hospital.

Academic Contact Info

Penn Medicine Radnor
Internal Medicine
250 King of Prussia Rd

Radnor, PA 19087
Phone: (610) 902-5600
Fax: (610) 902-5609
Patient appointments: 800-789-PENN (7366)

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