Thomas W. Day, M.D.
Family Medicine Physician · Duluth, MN
Thomas W. Day, M.D. is a family medicine physician with a practice address in Duluth, Minnesota, and NPI 1770572695, issued on Oct 14, 2005. Check the license (Minnesota 22345, as entered in NPPES) on the Minnesota Board of Medical Practice; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Thomas W. Day
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 22345 MN
Self-reported in NPPES; status is on the state search - Practice location
- 4190 Loberg Ave, Duluth, MN 55811
- Phone
- (218) 249-5700
- Enumerated
- Oct 14, 2005
- Record last updated
- Feb 2, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (218) 249-4666
- Medicaid ID
- 1770572695 MN
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,985 in Minnesota → Look up another NPI →
Also registered at 4190 Loberg Ave
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Verify Thomas W. Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 22345Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Thomas W. Day among 3,985 family medicine physician records in Minnesota
Thomas W. Day, M.D. is one of 3,985 family medicine physician records with a practice address in Minnesota. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileNo · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2017 · 63% 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 Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
153 family medicine physician records list a practice address in Duluth
They are 153 of the 4,084 NPPES records with a practice address in Duluth, and 3,985 family medicine physician records in Minnesota. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,985 in Minnesota → Every provider in Duluth → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- James Donovan, MDDuluth, MN 558111568413078
- Jocelyn Dorscher, MDHermantown, MN 558111740230929
- David HyjekHermantown, MN 558111982778064
- Benjamin Johnson, MDDuluth, MN 558111164428280
- Sean Kempke, MDHermantown, MN 558111891709531
- Bruce KnutsenHermantown, MN 558111285668855
- Elizabeth Liljeblad, MDHermantown, MN 558111104875632
- Elizabeth RaduegeHermantown, MN 558111073546263
Common questions
What is Thomas W. Day, M.D.'s NPI number?
Thomas W. Day, M.D.'s National Provider Identifier (NPI) is 1770572695, issued on Oct 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas W. Day, M.D. located?
The NPPES record lists a practice address at 4190 Loberg Ave, Duluth, MN, 55811. Phone: (218) 249-5700. Providers update this record themselves, so call before visiting.
How can I verify Thomas W. Day, M.D.'s license?
NPPES lists Minnesota license number 22345, as entered by the provider. 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.