Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Prohealth Medical Group Inc

Family Medicine Physician in Brookfield, WI · enumerated 2007 · authorized official Peter Geiss, MD, President.

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

National Provider Identifier

1891836680

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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 2085 N. Calhoun Road, Brookfield, WI, 53005

Phone (262) 928-7100

Fax (262) 928-7111

Enumeration date Feb 12, 2007

Last updated in NPPES May 24, 2022

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Peter Geiss, MD

Title President

Phone (262) 928-8669

Other identifiers

Identifier	Type	State	Issuer
0505180005	Other	WI	DME
32819200	Medicaid	WI	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Prohealth Medical Group Inc located?

The practice location on file with NPPES is in Brookfield, WI.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2022-05-24. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Erin Trampe Family Medicine Physician · Brookfield, WI NPI 1134192677 Moira O'Brien-Bruce Family Medicine Physician · Brookfield, WI NPI 1891768370 John Ostergaard Family Medicine Physician · Brookfield, WI NPI 1578536090 Lisa Spannbauer Nurse Practitioner · Brookfield, WI NPI 1043548365

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-24.