Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Alan Barry Klein, MD

Individual provider Internal Medicine Physician · NPI 1487745485

Alan Barry Klein, MD is an Internal Medicine in Louisville, Kentucky. Graduated from University of Louisville School of Medicine in 1981, 45 years ago. Practices with Dr Nair Internal Medicine, PLLC, a 15-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Kentucky.

Years since qualifying
45
Trained at
University of Louisville School of Medicine
Licensed in
KY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3903 Vantage Pl
Louisville, KY 40299-6801
Phone: (502) 356-4377
Fax: (888) 959-2460
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 8442 Dixie Hwy, Louisville, KY 40258-1140 — (502) 638-4280

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 24316 (KY)

Record details

NPI number1487745485
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 27, 2006
Last updated in NPPESOctober 31, 2023
Certification dateOctober 31, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF LOUISVILLE SCHOOL OF MEDICINE
Graduated 1981 (45 years in practice)
Group practice Dr. Nair Internal Medicine, Pllc — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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