Thomas J. Brennan, MD
Family Medicine Physician · Mankato, MN
Thomas J. Brennan, MD is a family medicine physician with a practice address in Mankato, Minnesota, and NPI 1407963226, issued on Aug 25, 2006. Check the license (Minnesota 57527, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Thomas J. Brennan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 57527 MN
3980 SD
Self-reported in NPPES; status is on the state search - Practice location
- 1230 E Main St, Mankato, MN 56001
- Phone
- (507) 625-1811
- Enumerated
- Aug 25, 2006
- Record last updated
- Jul 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,985 in Minnesota → Look up another NPI →
Also registered at 1230 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Craig Anderson, MDPediatrics Physician1437167020
- Margaret Bach, APRNNurse Practitioner1982184354
- Caroline Baerg, MDFamily Medicine Physician1518946573
Verify Thomas J. Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 57527Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average family medicine physician in 2024
1,856 Medicare Part D claims for 231 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Atorvastatin Calcium100 claims
- Levothyroxine Sodium88 claims
- Amlodipine Besylate81 claims
- Furosemide70 claims
- Omeprazole56 claims
- Gabapentin53 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.
Thomas J. Brennan among 3,985 family medicine physician records in Minnesota
Thomas J. Brennan, MD 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. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 42% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2020 · 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).
80 family medicine physician records list a practice address in Mankato
They are 80 of the 2,079 NPPES records with a practice address in Mankato, and 3,985 family medicine physician records in Minnesota.
All 3,985 in Minnesota → Every provider in Mankato → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ava Adams-Morris, MDMankato, MN 560011356326284
- Marypat Anderson, M.D.Mankato, MN 560011184606667
- Amy Boles, MDMankato, MN 560011760473722
- Chaun Cox, MDMankato, MN 560011780668822
- James Dungan, MDMankato, MN 560011831178870
- Richard Fleming, MDMankato, MN 560011497739536
- Carroll Galvin, MDMankato, MN 560011649256132
- Scott Helmers, M.D.Mankato, MN 560011326046731
Common questions
What is Thomas J. Brennan, MD's NPI number?
Thomas J. Brennan, MD's National Provider Identifier (NPI) is 1407963226, issued on Aug 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas J. Brennan, MD located?
The NPPES record lists a practice address at 1230 E Main St, Mankato, MN, 56001. Phone: (507) 625-1811. Providers update this record themselves, so call before visiting.
How can I verify Thomas J. Brennan, MD's license?
NPPES lists Minnesota license number 57527, 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.
How much does Thomas J. Brennan, MD prescribe under Medicare Part D?
In 2024, Thomas J. Brennan, MD had 1,856 Medicare Part D claims for 231 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.