Thomas E. Marshall, M.D.
Internal Medicine Physician · Glen Ellyn, IL
Thomas E. Marshall, M.D. is an internal medicine physician with a practice address in Glen Ellyn, Illinois, and NPI 1043202054, issued on Aug 16, 2005. Check the license (Illinois 036059776, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Thomas E. Marshall
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036059776 IL
Self-reported in NPPES; status is on the state search - Practice location
- 430 Pennsylvania Ave, Glen Ellyn, IL 60137
- Phone
- (630) 790-1792
- Enumerated
- Aug 16, 2005
- Record last updated
- Aug 10, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 036059776 IL
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 430 Pennsylvania Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas E. Marshall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036059776Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
11 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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 E. Marshall among 7,238 internal medicine physician records in Illinois
Thomas E. Marshall, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2011 · 47% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 internal medicine physician records list a practice address in Glen Ellyn
They are 18 of the 684 NPPES records with a practice address in Glen Ellyn, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Glen Ellyn → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- John Baird, MDGlen Ellyn, IL 601371851555619
- Walter Briney, M.D.Glen Ellyn, IL 601371659365955
- Jonathan Delew, M.D.Glen Ellyn, IL 601371629060710
- Adelbert Duvel, MDGlen Ellyn, IL 601371275508772
- Stephen Gawne, MDGlen Ellyn, IL 601371497729537
- Rita Herzing, M.D.Glen Ellyn, IL 601371316103559
- Mary Kungl, M.D.Glen Ellyn, IL 601371437215076
- Carol Olmstead Miecznikowski, MDGlen Ellyn, IL 601371467429456
Common questions
What is Thomas E. Marshall, M.D.'s NPI number?
Thomas E. Marshall, M.D.'s National Provider Identifier (NPI) is 1043202054, issued on Aug 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas E. Marshall, M.D. located?
The NPPES record lists a practice address at 430 Pennsylvania Ave, Glen Ellyn, IL, 60137. Phone: (630) 790-1792. Providers update this record themselves, so call before visiting.
How can I verify Thomas E. Marshall, M.D.'s license?
NPPES lists Illinois license number 036059776, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas E. Marshall, M.D. prescribe under Medicare Part D?
In 2024, Thomas E. Marshall, M.D. had 11 Medicare Part D claims; 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.