Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Donald J Kosiak, MD

Individual provider Family Medicine Physician · NPI 1629162706

Donald J Kosiak, MD is a Family Practice in Bismarck, North Dakota. Graduated from University of North Dakota School of Medicine in 1979, 47 years ago. Practices with Sanford Bismarck, a 561-clinician group and accepts Medicare assignment. Licensed in North Dakota.

Years since qualifying
47
Trained at
University of North Dakota School of Medicine
Licensed in
ND
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

3318 N 14th St
Bismarck, ND 58503-1614
Phone: (701) 323-8300
Fax: (701) 323-5709
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 4380 (ND)

Record details

NPI number1629162706
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 3, 2006
Last updated in NPPESSeptember 11, 2007

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF NORTH DAKOTA SCHOOL OF MEDICINE
Graduated 1979 (47 years in practice)
Group practice Sanford Bismarck — 561 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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