Mark Thayer, MD
NPI 1568424778 · Surgery Physician · Grantsburg, WI
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Thayer, MD is a Surgery Physician provider in Grantsburg, WI (NPI 1568424778).
Provider details
- NPI number
- 1568424778
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 32528 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-04
- Last updated
- 2022-07-21
Frequently asked questions
- What is Mark Thayer's NPI number?
- Mark Thayer's National Provider Identifier (NPI) is 1568424778, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Thayer's specialty?
- Mark Thayer is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Thayer located?
- Mark Thayer's practice location on file with NPPES is 257 W Saint George Ave, Grantsburg, WI 54840-7827.
- What is Mark Thayer's phone number?
- The practice phone number listed in the NPPES registry for Mark Thayer is (715) 463-5353.
- Does Mark Thayer accept Medicare?
- Mark Thayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Thayer's NPI active?
- Yes — Mark Thayer's NPI (1568424778) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.