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TSAI INTERNAL MEDICINE, INC.
NPI 1174813141
Internal Medicine in Louisville, KY

Active since April 12, 2011CLIA 18D0321264 · Microscopy
6400 DUTCHMANS PKWY, SUITE 210, LOUISVILLE, KY 40205(502) 897-1740(502) 896-1294 Get Directions Write a Review

NPPES record last updated: April 12, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Tsai Internal Medicine, Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TSAI INTERNAL MEDICINE, INC. (NPI 1174813141) is a healthcare organization registered as an internal medicine in Louisville, Kentucky and active in the NPI registry since April 2011. The organization holds a CLIA Microscopy certificate valid through February 8, 2027 and lists Y-yi Tsai, Owner, as its authorized official.

NPPES Registry Identity

NPI1174813141
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameTSAI INTERNAL MEDICINE, INC.
Location Address6400 DUTCHMANS PKWY, SUITE 210Louisville, KY 40205-3340
Mailing Address6400 Dutchmans Pkwy, Suite 210Louisville, KY 40205-3340 · (502) 897-1740 · Fax (502) 896-1294
Phone(502) 897-1740
Fax(502) 896-1294
Organization SubpartNo
Authorized OfficialY-yi TsaiOwner · (502) 897-1740
Enumeration DateApril 12, 2011
✔ NPI 1174813141 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in KY · 28194
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
6400 DUTCHMANS PKWY, Louisville, KY 40205
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Other Identifiers 3

Medicare PIN1692401KY
Medicaid64281942KY
Medicare UPINF58557KY

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tsai Internal Medicine, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Tsai Internal Medicine, Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Yiyi Tsai, MD
Internal Medicine
NPI 1790845832
6400 DUTCHMANS PKWY SUITE 210
Louisville, KY 40205
(502) 897-1740
✔ PECOSSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 18D0321264

Tsai Internal Medicine Inc · Louisville, KY
Active · expires Feb 8, 2027
CLIA Number18D0321264
Laboratory TypePhysician Office
Certificate Effective DateFebruary 9, 2025
Certificate Expiration DateFebruary 8, 2027
Laboratory DirectorRichard A. Gould
Laboratory Phone(502) 896-2342
Laboratory LocationTsai Internal Medicine Inc6400 Dutchmans Parkway Suite 210, Louisville, KY 40205
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Tsai Internal Medicine, Inc.'s NPI number?

The NPI number for Tsai Internal Medicine, Inc. is 1174813141. It was assigned to this organization in the NPPES registry on April 12, 2011.

Where is Tsai Internal Medicine, Inc. located?

Tsai Internal Medicine, Inc. is located at 6400 Dutchmans Pkwy Suite 210, Louisville, KY 40205. The listed phone number is (502) 897-1740.

What is Tsai Internal Medicine, Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Tsai Internal Medicine, Inc. enrolled in Medicare?

Yes. Tsai Internal Medicine, Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Tsai Internal Medicine, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Tsai Internal Medicine, Inc.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Tsai Internal Medicine, Inc. hold a CLIA laboratory certificate?

Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 18D0321264) is associated with this NPI, valid through February 8, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Tsai Internal Medicine, Inc. was last updated on April 12, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.