Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Eric R Niendorf, MD

Individual provider Body Imaging Physician · NPI 1780685404

Eric R Niendorf, MD practises Diagnostic Radiology in Eau Claire, Wisconsin. Graduated from University of Wisconsin School of Medicine in 1999, 27 years ago. Practices with Mayo Clinic Health System-Northwest Wisconsin Region Inc, a 799-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Minnesota and Wisconsin.

Years since qualifying
27
Trained at
University of Wisconsin School of Medicine
Licensed in
MN, WI
In the registry since
2005
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1400 Bellinger St
Eau Claire, WI 54703-5222
Phone: (715) 883-8522
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3300 Oakdale Ave N, Robbinsdale, MN 55422-2926 — (763) 559-2171

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 47740 (MN)
Body Imaging Physician Taxonomy 2085B0100X · Licence 47740 (MN)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 64033 (WI)
Diagnostic Ultrasound Physician Taxonomy 2085U0001X · Licence 47740 (MN)

Record details

NPI number1780685404
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 3, 2005
Last updated in NPPESSeptember 14, 2020
Certification dateSeptember 14, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Mayo Clinic Health System-Northwest Wisconsin Region Inc — 799 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Mastectomy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients2,329
Services billed 11,917 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Mayo Clinic Health System-Red Cedar Inc Hospital · Menomonie, WI · listed as Mayo Clinic Health System-Northwest Wisconsin Region, Inc
  • Mayo Clinic Health System Chippewa Valley Hospital · Bloomer, WI
  • Mayo Clinic Health System Eau Claire Hospital Hospital · Eau Claire, WI
  • Mayo Clinic Health System Oakridge Hospital · Osseo, WI
  • Mayo Clinic Health System-Northland Hospital · Barron, WI

Colleagues at Mayo Clinic Health System-Northwest Wisconsin Region Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 799 clinicians in the practice; 12 are shown here.

Other providers in Eau Claire