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

Gerald K Bayer, MD

Individual provider Medical Oncology Physician · NPI 1285726729

Gerald K Bayer, MD is a Medical Oncology Physician in Green Bay, Wisconsin. Licensed in Michigan and Wisconsin. Registered with an NPI since 2006.

Licensed in
MI, WI
In the registry since
2006
Specialties on file
2
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

835 S Van Buren St
Green Bay, WI 54301-3526
Phone: (920) 432-6049
Fax: (920) 884-3271
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 22282 (WI)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 4301051043 (MI)

Record details

NPI number1285726729
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 29, 2006
Last updated in NPPESJune 29, 2010
Mailing addressPo Box 13453, Green Bay, WI 54307-3453

Other providers in Green Bay