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PROHEALTH MEDICAL GROUP INC
NPI 1417085895
Internal Medicine in Oconomowoc, WI

Active since February 28, 2007
1306 W WISCONSIN AVE, SUITE 1002, OCONOMOWOC, WI 53066(262) 560-2300 Get Directions Write a Review

NPPES record last updated: May 23, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 23, 2022, Sep 8, 2021 (2 updates tracked since 2021).

About Prohealth Medical Group Inc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

PROHEALTH MEDICAL GROUP INC (NPI 1417085895) is a healthcare organization registered as an internal medicine in Oconomowoc, Wisconsin and active in the NPI registry since February 2007. The organization lists Peter Geiss, Md, President, as its authorized official.

NPPES Registry Identity

NPI1417085895
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NamePROHEALTH MEDICAL GROUP INC
Location Address1306 W WISCONSIN AVE, SUITE 1002Oconomowoc, WI 53066-2647
Mailing AddressN17w24100 Riverwood Dr, Suite 250Waukesha, WI 53188-1177 · (262) 928-4100 · Fax (262) 928-5835
Phone(262) 560-2300
Organization SubpartYes
Authorized OfficialPeter Geiss, MdPresident · (262) 928-8669
Enumeration DateFebruary 28, 2007
Last NPPES UpdateMay 23, 20222 updates tracked since enumeration
NPPES CertifiedMay 23, 2022
✔ NPI 1417085895 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedFamily MedicineTaxonomy 207Q00000X
1306 W WISCONSIN AVE, Oconomowoc, WI 53066
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Prohealth Medical Group Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

527

Medicare enrollment records show 527 clinicians reassign Medicare billing to Prohealth Medical Group Inc, which bills Medicare for the services they deliver. Of these, 42 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 41

Nurse Practitioner174
Family Practice83
Clinical Social Worker26
Diagnostic Radiology25
Physical Therapist in Private Practice20
Internal Medicine19
Mental Health Counselor18
Cardiovascular Disease (Cardiology)14
33 other specialties148

Nearest to this location (20)

See all 527
Lisa James
Mental Health Counselor
NPI 1356805808
418 E WISCONSIN AVE
Oconomowoc, WI 53066
(414) 429-6403
✔ PECOS✔ Accepts Medicare1.6 mi
Jodi Wiebelhaus, NP
Nurse Practitioner
NPI 1457551764
785 SUMMIT AVE
Oconomowoc, WI 53066
(262) 569-8488
✔ PECOS✔ Accepts Medicare2.2 mi
Sarit Aschkenazi Steinberg, MD
Obstetrics/Gynecology
NPI 1972602852
785 SUMMIT AVE STE 101 PROHEALTH CARE WOMEN'S CENTER
Oconomowoc, WI 53066
(262) 569-0345
✔ PECOS✔ Accepts Medicare2.2 mi
Evgeniya Khen, NP
Nurse Practitioner
NPI 1023790664
791 SUMMIT AVE
Oconomowoc, WI 53066
(262) 569-9400
✔ PECOS✔ Accepts Medicare2.2 mi
Norhan Mohammed, M.D.
Cardiovascular Disease (Cardiology)
NPI 1225487176
791 SUMMIT AVE
Oconomowoc, WI 53066
(262) 569-9400
✔ PECOS✔ Accepts Medicare2.2 mi
Kristen Vento, D.O.
Family Practice
NPI 1225205255
820 SUMMIT AVE PROHEALTH CARE MEDICAL ASSOCIATES
Oconomowoc, WI 53066
(262) 567-0223
✔ PECOS✔ Accepts Medicare2.3 mi
Dale Johnson, MD
Family Practice
NPI 1447211404
820 SUMMIT AVE PROHEALTH CARE MEDICAL ASSOCIATES FP
Oconomowoc, WI 53066
(262) 567-0223
✔ PECOS✔ Accepts Medicare2.3 mi
Cynthia Pangallo, MD
General Surgery
NPI 1710946132
888 THACKERAY TRL STE 103
Oconomowoc, WI 53066
(262) 567-1499
✔ PECOS✔ Accepts Medicare2.5 mi
Stanley Markus, MD
General Surgery
NPI 1134103641
888 THACKERAY TRL STE 103
Oconomowoc, WI 53066
(262) 567-1499
✔ PECOS✔ Accepts Medicare2.5 mi
Kathleen Garvey, M.D.
Dermatology
NPI 1760505234
1320 PABST FARMS CIR UNIT 180
Oconomowoc, WI 53066
(262) 560-0322
✔ PECOS✔ Accepts Medicare4.0 mi
Michelle Schlomer, MSN, APNP
Nurse Practitioner
NPI 1376540864
1185 CORPORATE CENTER DR SUITE 175 PROHEALTH CARE MEDICAL ASSOCIATES INC
Waukesha, WI 53188
(262) 928-8400
✔ PECOS✔ Accepts Medicare4.1 mi
Brenda Boschek, M.D.
Pediatric Medicine
NPI 1154393833
1185 CORPORATE CENTER DRIVE PROHEALTH CARE MEDICAL ASSOCIATES, INC.
Oconomowoc, WI 53066
(262) 928-8400
✔ PECOS✔ Accepts Medicare4.2 mi
Firas Ghanem, M.D.
Cardiovascular Disease (Cardiology)
NPI 1124008529
1185 CORPORATE CENTER DR
Oconomowoc, WI 53066
(262) 928-8800
✔ PECOS✔ Accepts Medicare4.2 mi
Sarah Sanford-Smith, MSN FNP-C
Nurse Practitioner
NPI 1073197000
1185 CORPORATE CENTER DR
Oconomowoc, WI 53066
(262) 928-8400
✔ PECOS✔ Accepts Medicare4.2 mi
Donna Voigt, APNP
Nurse Practitioner
NPI 1639143662
1185 CORPORATE CENTER DR STE 175 PROHEALTH CARE MEDICAL ASSOCIATES
Oconomowoc, WI 53066
(262) 928-8400
✔ PECOS✔ Accepts Medicare4.2 mi
Charles Allen, M.D.
Family Practice
NPI 1871804336
1185 CORPORATE CENTER DR STE 175
Oconomowoc, WI 53066
(262) 928-8400
✔ PECOS✔ Accepts Medicare4.2 mi
Jennifer Scheeler, M.D.
Family Practice
NPI 1649412339
1185 CORPORATE CENTER DR STE 175
Oconomowoc, WI 53066
(414) 928-4644
✔ PECOS✔ Accepts Medicare4.2 mi
David Schlomer, M.D.
Internal Medicine
NPI 1952373581
1185 CORPORATE CENTER DR PROHEALTH CARE MEDICAL ASSOCIATES INC.
Oconomowoc, WI 53066
(262) 928-8400
✔ PECOS✔ Accepts Medicare4.2 mi
William Cooper, MD
Internal Medicine
NPI 1023078037
1185 CORPORATE CENTER DR STE 175 PROHEALTH CARE MEDICAL ASSOCIATES INC.
Oconomowoc, WI 53066
(262) 928-8400
✔ PECOS✔ Accepts Medicare4.2 mi
Sophos Geroulis, M.D.
Neurology
NPI 1295820637
36500 AURORA DR
Summit, WI 53066
(262) 434-5000
✔ PECOS✔ Accepts Medicare4.6 mi
See all 527 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Prohealth Medical Group Inc's NPI number?

The NPI number for Prohealth Medical Group Inc is 1417085895. It was assigned to this organization in the NPPES registry on February 28, 2007.

Where is Prohealth Medical Group Inc located?

Prohealth Medical Group Inc is located at 1306 W Wisconsin Ave Suite 1002, Oconomowoc, WI 53066. The listed phone number is (262) 560-2300.

What is Prohealth Medical Group Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Prohealth Medical Group Inc enrolled in Medicare?

Yes. Prohealth Medical Group Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Prohealth Medical Group Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 527 clinicians in 41 Medicare specialties reassign their Medicare billing to Prohealth Medical Group Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (174), Family Practice (83) and Clinical Social Worker (26). Of these, 42 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Prohealth Medical Group Inc was last updated on May 23, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.