Thomas R. Gruszynski, MD
Obstetrics & Gynecology Physician · South Bend, IN
Thomas R. Gruszynski, MD is an obstetrics & gynecology physician with a practice address in South Bend, Indiana, and NPI 1083721310, issued on Aug 24, 2006. Check the license (Indiana 01023429A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Thomas R. Gruszynski
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 01023429A IN
Self-reported in NPPES; status is on the state search - Practice location
- 621 Memorial Dr, South Bend, IN 46601
- Phone
- (574) 234-2128
- Enumerated
- Aug 24, 2006
- Record last updated
- Oct 28, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (574) 234-4775
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 894 in Indiana → Look up another NPI →
Also registered at 621 Memorial Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas R. Gruszynski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01023429ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
15 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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 R. Gruszynski among 894 obstetrics & gynecology physician records in Indiana
Thomas R. Gruszynski, MD is one of 894 obstetrics & gynecology physician records with a practice address in Indiana. 76% 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 20% of them.
- NPI issued2006 · 20% of these records are older, 45% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2007 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 obstetrics & gynecology physician records list a practice address in South Bend
They are 33 of the 3,178 NPPES records with a practice address in South Bend, and 894 obstetrics & gynecology physician records in Indiana.
All 894 in Indiana → Every provider in South Bend → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Janelle Blickensderfer, D.O.South Bend, IN 466011477505543
- Robert Crumb, M.D.South Bend, IN 466011376516732
- Edward Durbin, MDSouth Bend, IN 466011194715581
- Keim Houser, M.D.South Bend, IN 466011376597757
- Francis Hussey, MDSouth Bend, IN 466011902809213
- Douglas Macgregor, D.O.South Bend, IN 466011316999402
- Rebecca McKown, MDSouth Bend, IN 466011225000847
- Rhonda Miller, MDSouth Bend, IN 466011669431144
Common questions
What is Thomas R. Gruszynski, MD's NPI number?
Thomas R. Gruszynski, MD's National Provider Identifier (NPI) is 1083721310, issued on Aug 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas R. Gruszynski, MD located?
The NPPES record lists a practice address at 621 Memorial Dr, South Bend, IN, 46601. Phone: (574) 234-2128. Providers update this record themselves, so call before visiting.
How can I verify Thomas R. Gruszynski, MD's license?
NPPES lists Indiana license number 01023429A, 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 R. Gruszynski, MD prescribe under Medicare Part D?
In 2024, Thomas R. Gruszynski, MD had 15 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. 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.