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

Individual provider Anesthesiology Physician · NPI 1609843911

Mark L. Grim, MD practises Anesthesiology in Duluth, Minnesota. Graduated from University of Minnesota Medical School in 2000, 26 years ago. Practices with The Duluth Clinic Ltd, a 1,127-clinician group and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
26
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

400 E 3rd St
Duluth, MN 55805 Not confirmed with CMS for 18 years — call before visiting
Phone: (218) 786-8364
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 46550 (MN)

Record details

NPI number1609843911
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 6, 2006
Last updated in NPPESOctober 9, 2008

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF MINNESOTA MEDICAL SCHOOL
Graduated 2000 (26 years in practice)
Group practice The Duluth Clinic Ltd — 1127 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 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 patients132
Services billed 156 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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 The Duluth Clinic Ltd

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1127 clinicians in the practice; 12 are shown here.

Other providers in Duluth