Thomas M. Armstrong, MD
Internal Medicine Physician · Indianapolis, IN
Thomas M. Armstrong, MD is an internal medicine physician with a practice address in Indianapolis, Indiana, and NPI 1518940816, issued on Nov 22, 2005. Check the license (Indiana 01032743A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Thomas M. Armstrong
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 01032743A IN
Self-reported in NPPES; status is on the state search - Practice location
- 2001 W 86TH St, Indianapolis, IN 46260
- Phone
- (317) 338-3634
- Enumerated
- Nov 22, 2005
- Record last updated
- Mar 18, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 100345480 IN
- Medicare enrollment
- Enrolled (PECOS I20041108000581); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,109 in Indiana → Look up another NPI →
Also registered at 2001 W 86TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah Abdel-Mageed, MDStudent in an Organized Health Care Education/Training Program1811690530
- Saleh AbuqwiderRegistered Nurse1922938513
- Aaron Acton, RNRegistered Nurse1932083987
- Christina Adamopoulos, WHNPWomen's Health Nurse Practitioner1134931678
- Jeremy Adamowicz, PAPhysician Assistant1790131357
- Nicholas AddlemanAnesthesiology Physician1518384478
Verify Thomas M. Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01032743ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
224 Medicare Part D claims for 112 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 27 claims were for opioids.
Most prescribed
- Oxycodone Hcl17 claims
- Aripiprazole13 claims
- Atorvastatin Calcium13 claims
- Cephalexin11 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.
Bills Medicare through one group practice
- St Vincent Physician Services Hospital And Health Care CenterIndianapolis, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas M. Armstrong among 2,109 internal medicine physician records in Indiana
Thomas M. Armstrong, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1983 · median 2005 among the 1,448 with a school on file
- Record last updated2016 · 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 →
The 8 internal medicine physician records with the nearest ZIP codes
- Lisa Altuglu, MDIndianapolis, IN 462601235129065
- Kristi Dickson, MDIndianapolis, IN 462601194717355
- Dianna Dye, MDIndianapolis, IN 462601962486209
- Usama Fahmy, MDIndianapolis, IN 462601487638722
- Mohammad Gad, M.D.Indianapolis, IN 462601801891692
- Matt Helmen, MDIndianapolis, IN 462601356325880
- Paige Huls, MDIndianapolis, IN 462601265416507
- Xu-Jing Liu, MDIndianapolis, IN 462601821098328
Common questions
What is Thomas M. Armstrong, MD's NPI number?
Thomas M. Armstrong, MD's National Provider Identifier (NPI) is 1518940816, issued on Nov 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas M. Armstrong, MD located?
The NPPES record lists a practice address at 2001 W 86TH St, Indianapolis, IN, 46260. Phone: (317) 338-3634. Providers update this record themselves, so call before visiting.
How can I verify Thomas M. Armstrong, MD's license?
NPPES lists Indiana license number 01032743A, 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 M. Armstrong, MD prescribe under Medicare Part D?
In 2024, Thomas M. Armstrong, MD had 224 Medicare Part D claims for 112 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.