Elizabeth Diane Loy, MD
Internal Medicine Physician · Louisville, KY
Elizabeth Diane Loy, MD is an internal medicine physician with a practice address in Louisville, Kentucky, and NPI 1922050103, issued on May 16, 2006. Check the license (Kentucky 25249, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Elizabeth Diane Loy
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 25249 KY
Self-reported in NPPES; status is on the state search - Practice location
- 200 E Chestnut St Bldg Suite303, Louisville, KY 40202
- Phone
- (502) 629-5552
- Enumerated
- May 16, 2006
- Record last updated
- Oct 23, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (502) 629-3132
- Medicaid IDs
- 64252497 KY
100360780 IN - Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,526 in Kentucky → Look up another NPI →
Also registered at 200 E Chestnut St Bldg Suite303
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Elizabeth Diane Loy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 25249Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average internal medicine physician in 2024
441 Medicare Part D claims for 183 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Prednisone20 claims
- Eliquis18 claims
- Furosemide18 claims
- Amlodipine Besylate17 claims
- Amoxicillin-Clavulanate Potass16 claims
- Metoprolol Succinate13 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): 100 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: $244.70
3 payments; by number, the most common kind was food and beverage; the largest payer was Inari Medical, Inc. 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.
Elizabeth Diane Loy among 1,526 internal medicine physician records in Kentucky
Elizabeth Diane Loy, MD is one of 1,526 internal medicine physician records with a practice address in Kentucky. 84% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 67% of these records are
- Record last updated2020 · 56% 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 Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
457 internal medicine physician records list a practice address in Louisville
They are 457 of the 21,891 NPPES records with a practice address in Louisville, and 1,526 internal medicine physician records in Kentucky.
All 1,526 in Kentucky → Every provider in Louisville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Britt, M.D.Louisville, KY 402021265424824
- Keith Carter, M.D.Louisville, KY 402021134111792
- Barbara Casper, MDLouisville, KY 402021124013776
- Jason Chesney, MDLouisville, KY 402021407837917
- Matthew Fargen, MDLouisville, KY 402021376534719
- Haeshik Gorr, MDLouisville, KY 402021821083478
- Jennifer Koch, MDLouisville, KY 402021134114788
- Rick Lawson, M.D.Louisville, KY 402021689676504
Common questions
What is Elizabeth Diane Loy, MD's NPI number?
Elizabeth Diane Loy, MD's National Provider Identifier (NPI) is 1922050103, issued on May 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Elizabeth Diane Loy, MD located?
The NPPES record lists a practice address at 200 E Chestnut St Bldg Suite303, Louisville, KY, 40202. Phone: (502) 629-5552. Providers update this record themselves, so call before visiting.
How can I verify Elizabeth Diane Loy, MD's license?
NPPES lists Kentucky license number 25249, 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 Elizabeth Diane Loy, MD prescribe under Medicare Part D?
In 2024, Elizabeth Diane Loy, MD had 441 Medicare Part D claims for 183 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Elizabeth Diane Loy, MD's MIPS final score?
The 2023 MIPS final score is 100 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.