MARK L THAYER MD
NPI 1568424778
Surgery in Grantsburg, WI

Q: What is Mark Thayer's NPI number?

The NPI number for Mark Thayer is 1568424778. It was assigned to this individual provider in the NPPES registry on April 4, 2006.

Q: What is Mark Thayer's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Thayer was last updated on July 21, 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.

Active since April 04, 2006PECOS Enrolled

257 W SAINT GEORGE AVE, GRANTSBURG, WI 54840(715) 463-5353(715) 463-2753 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 21, 2022, Sep 12, 2017 (2 updates tracked since 2017).

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About Mark L Thayer Md NPPES

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

MARK L THAYER MD (NPI 1568424778) is an individual surgery provider in Grantsburg, Wisconsin, licensed in Wisconsin (32528) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1568424778

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameMARK L THAYERCredential: MD

Location Address257 W SAINT GEORGE AVEGrantsburg, WI 54840-7827

Mailing Address257 W Saint George AveGrantsburg, WI 54840-7827 · (715) 463-5353 · Fax (715) 463-2753

Phone(715) 463-5353

Fax(715) 463-2753

Sole ProprietorNo

Enumeration DateApril 4, 2006

Last NPPES UpdateJuly 21, 20222 updates tracked since enumeration

✔ NPI 1568424778 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

Licenses✔ Licensed in WI · 32528✔ Licensed in MN · 31570

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Also ListedEmergency MedicineTaxonomy 207P00000X · License 32528 (WI)

257 W SAINT GEORGE AVE, Grantsburg, WI 54840

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Other Identifiers 1

Medicaid918723500MN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HealthPartners.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark L Thayer 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 Reassignments

Medicare enrollment records show Mark Thayer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Burnett Medical Center Inc

Same address

Rural Health

257 W SAINT GEORGE AVE
Grantsburg, WI 54840

Reassigned Medicare billing, Wisconsin enrollment
Also billed through NPI 1225191687 (Wisconsin)
83 clinicians in this Medicare group

NPI 1356499784 (715) 463-5353

Allina Health System

30 mi

Rehabilitation, Substance Use Disorder Unit

701 DELLWOOD ST S
Cambridge, MN 55008

Reassigned Medicare billing, Minnesota enrollment
3,733 clinicians in this Medicare group

NPI 1013194729 (763) 689-7700

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54840 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

$82.92 typical visit price

range $53.90 – $163.24

Typical copayment $20.73 (range $13.47 – $40.81)

Most-billed visit code 99203

Established Patient

$67.37 typical visit price

range $17.40 – $133.76

Typical copayment $16.84 (range $4.35 – $33.44)

Most-billed visit code 99213

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 20

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

ELIZABETH MARIE PETROWITZ PTA

Physical Therapy Assistant