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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. William Zimmer:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. William Zimmer is Excellent. Dr. Zimmer has been reviewed by 1 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Specialties & Research

Dr. William Zimmer, MD is board certified in Internal Medicine and Medical Oncology.

  • He has special expertise in 1 area:
  • Cancer

Education & Awards

Dr. Zimmer graduated from University of Nebraska, Omaha.


Dr. Zimmer has 4 hospital affiliations:

  • Memorial Medical Center 
  • Passavant Area Hospital 

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Additional Information
Dr. William Roger Zimmer MD is a male Internist, has 38 years of experience and practices in Internal Medicine and Medical Oncology.
Where does Dr. William R. Zimmer practice?
Dr. William Zimmer has 1 office location.
Dr. William Zimmer practices Internal Medicine and Medical Oncology near Freeport, IL.
See Freeport Internists and Freeport Oncologists.