About Me

DR. WILLIAM ZILLWEGER, MD is a physician who specializes in Internal Medicine at Genesis Medical Associates in Pittsburgh, PA. Dr. Zillweger is board certified by the National Board of Physicians and Surgeons in Internal Medicine. His clinical focus is Hospice Care, Minor Surgical Procedures, Advanced Diagnostics, Emergency Care, Ambulatory Care, Addiction Medicine, Gerontology, Hypertensive Diseases, and Comprehensive primary care. Dr. Zillweger and his staff are dedicated to providing quality, personalized healthcare and comprehensive primary-care services. His practice focuses on medical care for adults of all ages. Communication, understanding, confidence and trust are the basis of his professional relationships.

Contact Information
Contact Information
  • Fax: (412) 366-2775 Call
  • Phone: (412) 366-2950 Call
  • Internal Medicine
Areas Of Expertise
  • Hospice Care
    10 + years
  • Minor Surgical Procedures
    23 + years
  • Advanced Diagnostics
    23 + years
  • Emergency Care
    23 + years
  • Ambulatory Care
    23 + years
  • Addiction Medicine
    10 +years
  • Gerontology
    23 + years
  • Hypertensive Diseases
    23 + years
  • Comprehensive primary care
    23 + years
  • English
Education & Training
  • American University of the Caribbean
    Doctorate of Medicine
  • The College of Wooster
    Bachelor of Arts, Behavioral Psychology
  • Resident, Fellow
    Internal Medicine at Shadyside Hospital
Board Certifications
  • American Board of Internal Medicine (ABIM) – Board Certified
  • Diplomat, National Board of Physicians and Surgeons (NBPAS)
Professional Affiliations
  • Fellow
    American College of Physicians (ACP)
  • Former Chairman, Current Member At Large
    Pennsylvania Medical Society, Physicians Health Programs
  • Medical Director
    Celtic Hospice
  • Medical Director
    Genesis Medical Laboratory
  • Physician - Hospitalist
    St. Barnabas Medical Center & Healthcare System 
Hospital Affiliations
  • UPMC Passavant Cranberry
  • UPMC Passavant Hospital North Hills
Accepted Insurances
Genesis Medical Associates, Inc.