MICHAEL GERALD TRESP MD
NPI 1245265644
Pathology - Anatomic Pathology & Clinical Pathology in Oshkosh, WI

Q: What is Michael Tresp's NPI number?

The NPI number for Michael Tresp is 1245265644. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Q: What is Michael Tresp's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Michael Tresp was last updated on December 9, 2021. 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.

Active since July 12, 2006PECOS Enrolled

855 N WESTHAVEN DRIVE, OSHKOSH, WI 54904(920) 456-7502(920) 456-7501 Get Directions Write a Review

NPPES record last updated: December 9, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Michael Gerald Tresp Md NPPES

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

MICHAEL GERALD TRESP MD (NPI 1245265644) is an individual anatomic pathology & clinical pathology provider in Oshkosh, Wisconsin, licensed in Wisconsin (26060) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1245265644

Entity TypeIndividualMale

Primary Taxonomy207ZP0102X

Provider Legal NameMICHAEL GERALD TRESPCredential: MD

Location Address855 N WESTHAVEN DRIVEOshkosh, WI 54904-7668

Mailing Address8901 W Lincoln AveWest Allis, WI 53227-2477 · (414) 328-7950 · Fax (414) 328-8505

Phone(920) 456-7502

Fax(920) 456-7501

Sole ProprietorNo

Enumeration DateJuly 12, 2006

Last NPPES UpdateDecember 9, 2021

NPPES CertifiedDecember 9, 2021

✔ NPI 1245265644 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

License✔ Licensed in WI · 26060

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

855 N WESTHAVEN DRIVE, Oshkosh, WI 54904

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michael Gerald Tresp Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Michael Tresp reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The Medical College Of Wisconsin, Inc.

74 mi

Internal Medicine

8701 WATERTOWN PLANK RD
Milwaukee, WI 53226

Reassigned Medicare billing, Wisconsin enrollment
3,983 clinicians in this Medicare group

NPI 1699720086 (414) 955-7101

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

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

286 services123 patients

Pathology examination of tissue using a microscope, moderately high complexity 88307

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

31 services16 patients

Pathology examination of tissue using a microscope, moderately low complexity 88304

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

20 services17 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

18 services16 patients

Preparation of tissue for examination by removing any calcium present 88311

This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.

17 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54904 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$123.69 typical visit price

range $53.90 – $163.24

Typical copayment $30.92 (range $13.47 – $40.81)

Most-billed visit code 99204

Established Patient

$95.41 typical visit price

range $17.40 – $133.76

Typical copayment $23.85 (range $4.35 – $33.44)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LAURIE MOLLENHAUER P.T., D.P.T.

Physical Therapist

855 N WESTHAVEN DRIVE
OSHKOSH, WI 54904

Winnebago County (920) 456-7100

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 Michael Tresp's NPI number?

The NPI number for Michael Tresp is 1245265644. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Where is Michael Tresp located?

Michael Tresp practices at 855 N Westhaven Drive, Oshkosh, WI 54904. The listed phone number is (920) 456-7502.

What is Michael Tresp's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Michael Tresp enrolled in Medicare?

Yes. Michael Tresp is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Michael Tresp's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Tresp reassigns Medicare benefits to The Medical College Of Wisconsin, Inc. (Milwaukee, WI). The 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 Michael Tresp's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michael Tresp accept?

Health plans from CareSource (Common Ground Healthcare) list Michael Tresp as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Michael Tresp was last updated on December 9, 2021. 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.