Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Thomas J. Viren, MD

Individual provider Emergency Medicine Physician · NPI 1699745331

Dr. Thomas J. Viren, MD practises Emergency Medicine in Grand Rapids, Minnesota. Graduated from University of Minnesota Medical School in 1998, 28 years ago. Practices with Grand Itasca Clinic and Hospital, a 325-clinician group and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
28
Trained at
University of Minnesota Medical School
Licensed in
MN
In the registry since
2006
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

1601 Golf Course Rd
Grand Rapids, MN 55744-8648
Phone: (218) 326-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 44286 (MN)

Record details

NPI number1699745331
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 25, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF MINNESOTA MEDICAL SCHOOL
Graduated 1998 (28 years in practice)
Group practice Grand Itasca Clinic And Hospital — 325 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients127
Services billed 145 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Colleagues at Grand Itasca Clinic and Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 325 clinicians in the practice; 12 are shown here.

Other providers in Grand Rapids