Donald J. Kosiak, MD
Family Medicine Physician · Bismarck, ND
Donald J. Kosiak, MD is a family medicine physician with a practice address in Bismarck, North Dakota, and NPI 1629162706, issued on Oct 3, 2006. Check the license (North Dakota 4380, as entered in NPPES) on the North Dakota Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Donald J. Kosiak
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4380 ND
Self-reported in NPPES; status is on the state search - Practice location
- 3318 N 14TH St, Bismarck, ND 58503
- Phone
- (701) 323-8300
- Enumerated
- Oct 3, 2006
- Record last updated
- Sep 11, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (701) 323-5709
- Medicaid ID
- 17882 ND
- Medicare enrollment
- Enrolled (PECOS I20060119000412); accepts Medicare assignment
- Medical or professional school
- University Of North Dakota School Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 596 in North Dakota → Look up another NPI →
Also registered at 3318 N 14TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lynn Ashley, M.D.Family Medicine Physician1558317388
- Susan Betting, MDFamily Medicine Physician1700849833
- Ambreen Chughtai, MDFamily Medicine Physician1194448944
- David Gayton, MDFamily Medicine Physician1356433718
- Saige Kassian, LPCCProfessional Counselor1841855913
- Lindsey Lommen Kadrmas, MDFamily Medicine Physician1215374996
Verify Donald J. Kosiak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Dakota Board of Medicine
Search for license 4380Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.6 times the Medicare Part D claims of the average family medicine physician in 2024
19,907 Medicare Part D claims for 648 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 267 claims were for opioids.
Most prescribed
- Furosemide983 claims
- Atorvastatin Calcium837 claims
- Levothyroxine Sodium782 claims
- Amlodipine Besylate646 claims
- Metoprolol Succinate621 claims
- Lisinopril552 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 84 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $20.71
1 payment: food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Sanford BismarckBismarck, ND
- Wishek Hospital-Clinic AssociationNapoleon, ND
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Donald J. Kosiak among 596 family medicine physician records in North Dakota
Donald J. Kosiak, MD is one of 596 family medicine physician records with a practice address in North Dakota. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 57% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated1979 · median 2007 among the 305 with a school on file
- Record last updated2007 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a North Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
116 family medicine physician records list a practice address in Bismarck
They are 116 of the 3,669 NPPES records with a practice address in Bismarck, and 596 family medicine physician records in North Dakota.
All 596 in North Dakota → Every provider in Bismarck → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lynn Ashley, M.D.Bismarck, ND 585031558317388
- Biron Baker, M.D.Bismarck, ND 585031124081658
- Susan Betting, MDBismarck, ND 585031700849833
- Angela Dornacker-Eggl, M.D.Bismarck, ND 585031730109257
- David Gayton, MDBismarck, ND 585031356433718
- Linda Gourneau, M.D.Bismarck, ND 585031902911639
- Denise McDonough, MDBismarck, ND 585031417069089
- Douglas Moen, M.D.Bismarck, ND 585031477506137
Common questions
What is Donald J. Kosiak, MD's NPI number?
Donald J. Kosiak, MD's National Provider Identifier (NPI) is 1629162706, issued on Oct 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald J. Kosiak, MD located?
The NPPES record lists a practice address at 3318 N 14TH St, Bismarck, ND, 58503. Phone: (701) 323-8300. Providers update this record themselves, so call before visiting.
How can I verify Donald J. Kosiak, MD's license?
NPPES lists North Dakota license number 4380, as entered by the provider. Search the North Dakota Board of Medicine at https://www.ndbom.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Donald J. Kosiak, MD prescribe under Medicare Part D?
In 2024, Donald J. Kosiak, MD had 19,907 Medicare Part D claims for 648 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Donald J. Kosiak, MD's MIPS final score?
The 2023 MIPS final score is 84 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.