David Armstrong, D.O.
Internal Medicine Physician · Louisville, KY
David Armstrong, D.O. is an internal medicine physician with a practice address in Louisville, Kentucky, and NPI 1487852349, issued on Jul 3, 2007. Check the license (Kentucky TP821, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- David Armstrong
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- TP821 KY
OS014098 PA
10351A WY
Self-reported in NPPES; status is on the state search - Practice location
- 401 E Chestnut St Unit 310, Louisville, KY 40202
- Phone
- (502) 588-4600
- Enumerated
- Jul 3, 2007
- Entity
- Type 1 · individual
Also registered at 401 E Chestnut St Unit 310
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Abell, MDGastroenterology Physician1174567382
- Lachelle Achterberg, APRNFamily Nurse Practitioner1427396290
- Sergei Airapetov, DOStudent in an Organized Health Care Education/Training Program1467931501
- Esther Bak, MDStudent in an Organized Health Care Education/Training Program1881259661
- Dawn BalcomFamily Nurse Practitioner1811366404
- Ross BashamStudent in an Organized Health Care Education/Training Program1811631435
Verify David Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license TP821Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
72% fewer Medicare Part D claims than the average internal medicine physician in 2024
780 Medicare Part D claims for 134 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Hydroxychloroquine Sulfate159 claims
- Leflunomide89 claims
- Methotrexate83 claims
- Allopurinol41 claims
- Sulfasalazine Dr39 claims
- Prednisone37 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.
The practice group's Medicare quality score for 2023: 73.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $63.49
3 payments, mostly food and beverage; the largest payer was Pfizer Inc.. The 65,274 providers of this specialty with any payment received $2,536.66 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.
498 internal medicine physician records list a Louisville practice address
They are 498 of the 21,891 NPPES records with a Louisville practice address, and 1,811 internal medicine physician records in Kentucky.
All 498 in Louisville → All 1,811 in Kentucky → Every provider in Louisville →
Other internal medicine physician records in Kentucky
- June AbadillaJackson, KY1811975683
- Joseph Abayev, MDLouisville, KY1437503752
- Nicole Abbot, MDUnion, KY1063895522
- Saba Abdulsada, MDLexington, KY1750906418
- Melecio Abordo, M.D.Jackson, KY1871590935
- Michelle Aboud, MDLouisville, KY1891709515
- Sonu Abraham, M.D.Lexington, KY1164975835
- Wilmer Abshier, M.D.Owensboro, KY1225020621
- Mahmoud Abualayem, MD.Berea, KY1659703163
- Kamana Acharya, M.DElizabethtown, KY1124647359
Common questions
What is David Armstrong, D.O.'s NPI number?
David Armstrong, D.O.'s National Provider Identifier (NPI) is 1487852349, issued on Jul 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is David Armstrong, D.O. located?
The NPPES record lists a practice address at 401 E Chestnut St Unit 310, Louisville, KY, 40202. Phone: (502) 588-4600. Providers update this record themselves, so call before visiting.
How can I verify David Armstrong, D.O.'s license?
NPPES lists Kentucky license number TP821, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David Armstrong, D.O. prescribe under Medicare Part D?
In 2024, David Armstrong, D.O. had 780 Medicare Part D claims for 134 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is David Armstrong, D.O.'s Medicare quality score?
The 2023 MIPS final score is 73.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.