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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. Peter Geiss:

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Specialties & Research

Dr. Peter Geiss, MD is board certified in Internal Medicine.

Education & Awards

Dr. Geiss graduated from Saint Louis University.


Dr. Geiss has 3 hospital affiliations:

  • Oconomowoc Memorial Hospital 
  • Wheaton Franciscan Healthcare - Elmbrook Memorial 
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Additional Information
Dr. Peter Thomas Geiss MD is a male Internist, has 34 years of experience and practices in Internal Medicine.
Where does Dr. Peter T. Geiss practice?
Dr. Peter Geiss has 2 office locations.
Dr. Peter Geiss practices Internal Medicine near Waukesha, WI.
See Waukesha Internists.