Michael B. Kowalski, M.D.
Internal Medicine Physician · Duluth, MN
Michael B. Kowalski, M.D. is an internal medicine physician with a practice address in Duluth, Minnesota, and NPI 1447306683, issued on Jan 27, 2007. Check the license on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Michael B. Kowalski
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 24546 OK
Self-reported in NPPES; status is on the state search - Practice location
- 400 East 3RD Street, Duluth, MN 55805
- Phone
- (218) 786-8132
- Enumerated
- Jan 27, 2007
- Record last updated
- Sep 10, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20081015000657); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,632 in Minnesota → Look up another NPI →
Also registered at 400 East 3RD Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael B. Kowalski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical PracticeCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average internal medicine physician in 2024
545 Medicare Part D claims for 122 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate26 claims
- Metoprolol Succinate23 claims
- Prednisone23 claims
- Furosemide22 claims
- Eliquis19 claims
- Divalproex Sodium17 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.
Bills Medicare through one group practice
- Park Nicollet ClinicBloomington, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael B. Kowalski among 2,632 internal medicine physician records in Minnesota
Michael B. Kowalski, M.D. is one of 2,632 internal medicine physician records with a practice address in Minnesota. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 42% of them.
- NPI issued2007 · 42% of these records are older, 52% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2004 · median 2008 among the 1,700 with a school on file
- Record last updated2008 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
63 internal medicine physician records list a practice address in Duluth
They are 63 of the 4,084 NPPES records with a practice address in Duluth, and 2,632 internal medicine physician records in Minnesota.
All 2,632 in Minnesota → Every provider in Duluth → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Arvold, M.D.Duluth, MN 558051790735504
- Robert BomanDuluth, MN 558051912943317
- Margaret Chen, MDDuluth, MN 558051578678272
- Christine DepenthalDuluth, MN 558051366553067
- Josefino DiazDuluth, MN 558051891723599
- Peter Good, MDDuluth, MN 558051417913500
- Okechukwu IwuDuluth, MN 558051740356351
- Melanie JohnsonDuluth, MN 558051528132495
Common questions
What is Michael B. Kowalski, M.D.'s NPI number?
Michael B. Kowalski, M.D.'s National Provider Identifier (NPI) is 1447306683, issued on Jan 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael B. Kowalski, M.D. located?
The NPPES record lists a practice address at 400 East 3RD Street, Duluth, MN, 55805. Phone: (218) 786-8132. Providers update this record themselves, so call before visiting.
How can I verify Michael B. Kowalski, M.D.'s license?
Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael B. Kowalski, M.D. prescribe under Medicare Part D?
In 2024, Michael B. Kowalski, M.D. had 545 Medicare Part D claims for 122 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.