Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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William S. Zillweger, MD

Individual provider Internal Medicine Physician · NPI 1285607002

William S. Zillweger, MD is an Internal Medicine in Pittsburgh, Pennsylvania. Qualified in 1982, 44 years ago. Practices with Genesis Medical Associates, Inc, a 98-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
44
Licensed in
PA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

9104 Babcock Blvd Ste 3111
Pittsburgh, PA 15237-5818
Phone: (412) 366-2950
Fax: (412) 366-2775
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 054995L (PA)

Record details

NPI number1285607002
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 10, 2006
Last updated in NPPESJanuary 12, 2011
Mailing address9104 Babcock Blvd, Suite 3111, Pittsburgh, PA 15237-5818

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1982 (44 years in practice)
Group practice Genesis Medical Associates, Inc. — 98 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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