Marshfield Clinic in Wausau, WI
This location of Marshfield Clinic bills under NPI 1669551925, an organization record issued on Nov 6, 2006 with the primary taxonomy Durable Medical Equipment & Medical Supplies. It is one of 71 NPIs registered under this name and one of 5 in Wausau; each clinician who sees you there has their own NPI and license.
- Legal name
- Marshfield Clinic
- Entity
- Type 2 · organization, a subpart
- Parent organization
- Marshfield Clinic
- Primary taxonomy
- Durable Medical Equipment & Medical Supplies 332B00000X
- Practice location
- 3500 STEWART AVE, Wausau, WI 54401
- Phone
- 715-841-4950
- Mailing address
- Marshfield, WI
- Enumerated
- Nov 6, 2006
- Record updated
- Feb 19, 2008
- Authorized official
- Medical Director Reimbursement (title as filed)
The other 4 Wausau NPIs
- Marshfield Clinic2600 STEWART AVE SUITE 30 · issued Nov 6, 20061831278191
- Marshfield Clinic INC2727 PLAZA DR STE 100 · issued Nov 20, 20061174697908
- Marshfield Clinic2600 STEWART CENTER · issued Jul 6, 20091225267834
- Marshfield Clinic INC2727 PLAZA DR · issued Sep 15, 20151649649187
4 clinicians CMS lists with Marshfield Clinic in Wausau
- Reyaad Hayek, MDDiagnostic Radiology Physician1710992276
- Joel Nielsen, DODiagnostic Radiology Physician1528070455
- Sarah Nielsen, DODiagnostic Radiology Physician1134137995
- Adam Wadzinski, DODiagnostic Radiology Physician1669899530
Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.
Every location registered under this name, in 26 cities.
See every locationChecking an organization
- Confirm the business with the Wisconsin secretary of state.
- Check the HHS-OIG exclusion list for the organization.
- Verify each clinician on their own record and the state license search.
Common questions
What does subpart mean?
The organization registered this NPI as a subpart: a part of the organization, such as a location, that bills under its own NPI.
Is an organization NPI a license?
No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.
Which Wausau NPI should I use?
Ask the office which NPI it bills under; all 5 Wausau NPIs are registered under the same name.
Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.