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Prohealth Medical Group Inc

Internal Medicine Physician in Oconomowoc, WI · enumerated 2007 · authorized official Peter Geiss, MD, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1417085895

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Registry record

Entity type Organization (Type 2)
Legal business name Prohealth Medical Group Inc
Parent organization Prohealth Medical Group Inc
Practice address 1306 W Wisconsin Ave, Suite 1002, Oconomowoc, WI, 53066
Phone (262) 560-2300
Enumeration date Feb 28, 2007
Last updated in NPPES May 23, 2022

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Peter Geiss, MD
Title President
Phone (262) 928-8669

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What type of organization is Prohealth Medical Group Inc?
Prohealth Medical Group Inc is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-23.