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

Dr. William R Zimmer, MD

Individual provider Hematology & Oncology Physician · NPI 1275575821

Dr. William R Zimmer, MD is a Hematology & Oncology Physician in Springfield, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
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

301 N 8th St Ste 1B201
Springfield, IL 62701-1041
Phone: (217) 535-3799
Fax: (217) 525-5685
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X (IL)

Record details

NPI number1275575821
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 11, 2006
Last updated in NPPESOctober 2, 2007
Mailing addressPo Box 1977, Springfield, IL 62705-1977

Other providers in Springfield