Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. David J Mast, MD

Individual provider Internal Medicine Physician · NPI 1912958331

Dr. David J Mast, MD is an Internal Medicine in Duluth, Minnesota. Graduated from University of Minnesota Medical School in 1985, 41 years ago. Practices with St Luke's Hospital of Duluth, a 413-clinician group and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
41
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

1001 E Superior St Ste L401
Duluth, MN 55802-2207
Phone: (218) 249-7960
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 30485 (MN)

Record details

NPI number1912958331
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 12, 2006
Last updated in NPPESJuly 13, 2026
Mailing address1001 E Superior St, Ste L401, Duluth, MN 55802-2207

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MINNESOTA MEDICAL SCHOOL
Graduated 1985 (41 years in practice)
Group practice St. Luke'S Hospital Of Duluth — 413 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Duluth