Thomas R. Marshall, MD
Internal Medicine Physician · Indianapolis, IN
Thomas R. Marshall, MD is an internal medicine physician with a practice address in Indianapolis, Indiana, and NPI 1932153947, issued on May 22, 2006. Check the license (Indiana 01032356A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Thomas R. Marshall
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 01032356A IN
Self-reported in NPPES; status is on the state search - Practice location
- 6820 Parkdale PL, Indianapolis, IN 46254
- Phone
- (317) 297-7773
- Enumerated
- May 22, 2006
- Record last updated
- Jan 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (317) 297-3619
- Medicaid ID
- 200040630 IN
- Medicare enrollment
- Enrolled (PECOS I20100407000783); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,109 in Indiana → Look up another NPI →
Also registered at 6820 Parkdale PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas R. Marshall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01032356ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average internal medicine physician in 2024
5,384 Medicare Part D claims for 345 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 146 claims were for opioids.
Most prescribed
- Atorvastatin Calcium447 claims
- Amlodipine Besylate256 claims
- Omeprazole204 claims
- Rosuvastatin Calcium192 claims
- Gabapentin143 claims
- Levothyroxine Sodium137 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: $132.78
2 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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
- IU Health Medical Group LLCIndianapolis, IN
- University Family Physicians, Inc.Indianapolis, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas R. Marshall among 2,109 internal medicine physician records in Indiana
Thomas R. Marshall, MD is one of 2,109 internal medicine physician records with a practice address in Indiana. 85% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 54% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1982 · median 2005 among the 1,448 with a school on file
- Record last updated2021 · 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 207R00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
699 internal medicine physician records list a practice address in Indianapolis
They are 699 of the 30,493 NPPES records with a practice address in Indianapolis, and 2,109 internal medicine physician records in Indiana.
All 2,109 in Indiana → Every provider in Indianapolis → Internal Medicine Physician nationwide →
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- James Leatherman, M.D.Indianapolis, IN 462541215971775
- Michael Maddox, M.D.Indianapolis, IN 462541821031865
Common questions
What is Thomas R. Marshall, MD's NPI number?
Thomas R. Marshall, MD's National Provider Identifier (NPI) is 1932153947, issued on May 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas R. Marshall, MD located?
The NPPES record lists a practice address at 6820 Parkdale PL, Indianapolis, IN, 46254. Phone: (317) 297-7773. Providers update this record themselves, so call before visiting.
How can I verify Thomas R. Marshall, MD's license?
NPPES lists Indiana license number 01032356A, 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. Marshall, MD prescribe under Medicare Part D?
In 2024, Thomas R. Marshall, MD had 5,384 Medicare Part D claims for 345 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.