Yi Yi Tsai, MD
Internal Medicine Physician · Louisville, KY
Yi Yi Tsai, MD is an internal medicine physician with a practice address in Louisville, Kentucky, and NPI 1790845832, issued on Dec 11, 2006. Check the license (Kentucky 28194, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Yi Yi Tsai
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 28194 KY
Self-reported in NPPES; status is on the state search - Practice location
- 6400 Dutchmans Pkwy, Louisville, KY 40205
- Phone
- (502) 897-1740
- Enumerated
- Dec 11, 2006
- Record last updated
- Mar 9, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (502) 896-1294
- Medicaid ID
- 64281942 KY
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,526 in Kentucky → Look up another NPI →
Also registered at 6400 Dutchmans Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Yi Yi Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 28194Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% more Medicare Part D claims than the average internal medicine physician in 2024
4,301 Medicare Part D claims for 331 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium250 claims
- Amlodipine Besylate189 claims
- Losartan Potassium179 claims
- Levothyroxine Sodium178 claims
- Simvastatin174 claims
- Lisinopril162 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.
Industry payments in 2024: $2,614.24
41 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
Yi Yi Tsai among 1,526 internal medicine physician records in Kentucky
Yi Yi Tsai, 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 updated2011 · 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
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- Neena James, MDLouisville, KY 402051609064542
- Sangeeta Kapoor, M.D.Louisville, KY 402051356382972
- Joseph Murrow, MDLouisville, KY 402051316996739
- Lynn O'Keeffe, M.D.Louisville, KY 402051689638470
- Karen Palmer, DOLouisville, KY 402051134324239
Common questions
What is Yi Yi Tsai, MD's NPI number?
Yi Yi Tsai, MD's National Provider Identifier (NPI) is 1790845832, issued on Dec 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yi Yi Tsai, MD located?
The NPPES record lists a practice address at 6400 Dutchmans Pkwy, Louisville, KY, 40205. Phone: (502) 897-1740. Providers update this record themselves, so call before visiting.
How can I verify Yi Yi Tsai, MD's license?
NPPES lists Kentucky license number 28194, 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 Yi Yi Tsai, MD prescribe under Medicare Part D?
In 2024, Yi Yi Tsai, MD had 4,301 Medicare Part D claims for 331 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.