David Troy Armstrong, D.O.
Rheumatology Physician · Louisville, KY
David Troy Armstrong, D.O. is a rheumatology 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 Troy Armstrong
- Credential
- D.O.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- 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
- Record last updated
- Jun 14, 2022
- Medicaid ID
- 1487852349 WY
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 88 in Kentucky → Look up another NPI →
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.
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- Sergei Airapetov, DOCardiovascular Disease Physician1467931501
- Esther Bak, MDInternal Medicine Physician1881259661
- Dawn BalcomFamily Nurse Practitioner1811366404
- Ross BashamStudent in an Organized Health Care Education/Training Program1811631435
Verify David Troy 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
61% fewer Medicare Part D claims than the average rheumatology physician in 2024
780 Medicare Part D claims for 134 beneficiaries, against an average of 1,978 among the 6,301 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 MIPS final score for 2023 (Medicare payment program): 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; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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.
David Troy Armstrong among 88 rheumatology physician records in Kentucky
David Troy Armstrong, D.O. is one of 88 rheumatology physician records with a practice address in Kentucky. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 36% of them.
- NPI issued2007 · 36% of these records are older, 48% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2022 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Kentucky
There are 88 rheumatology physician records in Kentucky.
All 88 in Kentucky → Every provider in Louisville → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Rachel Chase, MDLouisville, KY 402021518052893
- Mark Heinicke, M.D.Louisville, KY 402021659400976
- Shyam PatelLouisville, KY 402021548955875
- Housam Sarakbi, MDLouisville, KY 402021629475066
- Steven Stern, MDLouisville, KY 402021528042918
- Tristan Blackburn, M.D.Louisville, KY 402071417176249
- Angelo Ciliberti, MDLouisville, KY 402071811428964
- Carolyn Gleason, M.D.Louisville, KY 402071316013790
Common questions
What is David Troy Armstrong, D.O.'s NPI number?
David Troy 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 Troy 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 Troy 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 Troy Armstrong, D.O. prescribe under Medicare Part D?
In 2024, David Troy Armstrong, D.O. had 780 Medicare Part D claims for 134 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is David Troy Armstrong, D.O.'s MIPS final 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), 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.