Thomas Larsen, MD
Family Medicine Physician · South Bend, IN
Thomas Larsen, MD is a family medicine physician with a practice address in South Bend, Indiana, and NPI 1285998146, issued on Jun 26, 2012. Check the license (Indiana 01075173A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Thomas Larsen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 01075173A IN
Self-reported in NPPES; status is on the state search - Practice location
- 4440 Portage Ave, South Bend, IN 46628
- Phone
- (574) 204-6200
- Enumerated
- Jun 26, 2012
- Record last updated
- Sep 9, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (574) 239-1520
- Medicaid ID
- 201112870 IN
- Medicare enrollment
- Enrolled (PECOS I20150611000123); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,506 in Indiana → Look up another NPI →
Also registered at 4440 Portage Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Cassady, M.D.Family Medicine Physician1407206824
- Jonathan Ditty, M.D.Family Medicine Physician1518316140
Verify Thomas Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01075173ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average family medicine physician in 2024
7,732 Medicare Part D claims for 476 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 259 claims were for opioids.
Most prescribed
- Atorvastatin Calcium578 claims
- Amlodipine Besylate463 claims
- Levothyroxine Sodium297 claims
- Losartan Potassium270 claims
- Lisinopril221 claims
- Rosuvastatin Calcium152 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.
Industry payments in 2024: $242.71
12 payments; by number, the most common kind was food and beverage; the largest payer was Indivior Inc. 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
- Beacon Medical Group IncSouth Bend, IN
- The South Bend Clinic LLCSouth Bend, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Larsen among 3,506 family medicine physician records in Indiana
Thomas Larsen, MD is one of 3,506 family medicine physician records with a practice address in Indiana. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 70% of them.
- NPI issued2012 · 70% of these records are older, 27% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2008 · median 2005 among the 2,196 with a school on file
- Record last updated2015 · 48% 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 Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
145 family medicine physician records list a practice address in South Bend
They are 145 of the 3,178 NPPES records with a practice address in South Bend, and 3,506 family medicine physician records in Indiana.
All 3,506 in Indiana → Every provider in South Bend → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- David Bertoncini, MDSouth Bend, IN 466281336166941
- James Blechl, MDSouth Bend, IN 466281982694568
- Melinda Dy, D.O.South Bend, IN 466281508870312
- Curtis Gongwer, MDSouth Bend, IN 466281043200629
- Cameron Gongwer, MDSouth Bend, IN 466281710904321
- Christopher Hall, M.D.South Bend, IN 466281750379871
- Michael Helms, M.D.South Bend, IN 466281437191665
- Vincent Henderson, M.D.South Bend, IN 466281275521452
Common questions
What is Thomas Larsen, MD's NPI number?
Thomas Larsen, MD's National Provider Identifier (NPI) is 1285998146, issued on Jun 26, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Larsen, MD located?
The NPPES record lists a practice address at 4440 Portage Ave, South Bend, IN, 46628. Phone: (574) 204-6200. Providers update this record themselves, so call before visiting.
How can I verify Thomas Larsen, MD's license?
NPPES lists Indiana license number 01075173A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Larsen, MD prescribe under Medicare Part D?
In 2024, Thomas Larsen, MD had 7,732 Medicare Part D claims for 476 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.