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

Dr. Nicholas C. Ellefson, DO

Individual provider Hospitalist Physician · NPI 1639699200

Dr. Nicholas C. Ellefson, DO is a Hospitalist in Duluth, Minnesota. Graduated from West Virginia School of Osteopathic Medicine in 2012, 14 years ago. Practices with St Marys Hospital of Superior, a 97-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Minnesota, Wisconsin and West Virginia.

Years since qualifying
14
Trained at
West Virginia School of Osteopathic Medicine
Licensed in
MN, WI, WV
In the registry since
2017
Specialties on file
5
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

402 E 2nd St
Duluth, MN 55805-1906
Phone: (218) 786-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3500 Tower Ave, Superior, WI 54880-4491 — (715) 817-7100

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 66646 (MN)
Hospitalist Physician Taxonomy 208M00000X · Licence 71579-21 (WI)
Family Medicine Physician Taxonomy 207Q00000X · Licence 66646 (MN)
Family Medicine Physician Taxonomy 207Q00000X · Licence 71579-21 (WI)
Family Medicine Physician Taxonomy 207Q00000X · Licence 3356 (WV)

Record details

NPI number1639699200
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 23, 2017
Last updated in NPPESSeptember 1, 2026
Certification dateSeptember 1, 2026

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesFAMILY PRACTICE
Medical schoolWEST VIRGINIA SCHOOL OF OSTEOPATHIC MEDICINE
Graduated 2012 (14 years in practice)
Group practice St Marys Hospital Of Superior — 97 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 patients186
Services billed 445 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.

Also affiliated with 1 nursing home, which CMS identifies by certification number only.

Colleagues at St Marys Hospital of Superior

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 97 clinicians in the practice; 12 are shown here.

Other providers in Duluth