Alan Barry Klein, MD
Internal Medicine Physician · Louisville, KY
Alan Barry Klein, MD is an internal medicine physician with a practice address in Louisville, Kentucky, and NPI 1487745485, issued on Sep 27, 2006. Check the license (Kentucky 24316, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Alan Barry Klein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 24316 KY
Self-reported in NPPES; status is on the state search - Practice location
- 3903 Vantage PL, Louisville, KY 40299
- Phone
- (502) 356-4377
- Enumerated
- Sep 27, 2006
- Record last updated
- Oct 31, 2023
- Fax
- (888) 959-2460
- Medicaid ID
- 64243165 KY
- Medicare enrollment
- Enrolled (PECOS I20160719001528); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 1981
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,526 in Kentucky → Look up another NPI →
Also registered at 3903 Vantage PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Alvey, APRNFamily Nurse Practitioner1407850142
- Kimberly Cashion, APRNFamily Nurse Practitioner1396749156
- Kristin FarnsleyFamily Nurse Practitioner1215304167
- Carrie King, APRNNurse Practitioner1912247644
- Kristen Longino, NP-CFamily Nurse Practitioner1396104550
- Diane Sawyer, APRNFamily Nurse Practitioner1285185546
Verify Alan Barry Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 24316Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,544 Medicare Part D claims for 90 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 26 claims were for opioids.
Most prescribed
- Amlodipine Besylate69 claims
- Atorvastatin Calcium60 claims
- Potassium Chloride54 claims
- Pantoprazole Sodium47 claims
- Clopidogrel44 claims
- Donepezil Hcl42 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.
Bills Medicare through one group practice
- Dr. Nair Internal Medicine, PLLCLouisville, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alan Barry Klein among 1,526 internal medicine physician records in Kentucky
Alan Barry Klein, 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 fileYes · 67% of these records are
- Graduated1981 · median 2006 among the 1,025 with a school on file
- Record last updated2023 · 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
- Brandon Boyd, DOLouisville, KY 402991376117762
- Jackson BrownLouisville, KY 402991972181469
- Camryn Gowan, MDLouisville, KY 402991326734393
- Lesley Harris, MDLouisville, KY 402991760407258
- Kasey Isaacs, MDCarlisle, KY 403111508560764
- Ana Rinaldini, MDCarlisle, KY 403111699711010
- Mouhamed Albaree, MDClay City, KY 403121710051479
- Taufik Kassis, MDFrenchburg, KY 403221174545628
Common questions
What is Alan Barry Klein, MD's NPI number?
Alan Barry Klein, MD's National Provider Identifier (NPI) is 1487745485, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alan Barry Klein, MD located?
The NPPES record lists a practice address at 3903 Vantage PL, Louisville, KY, 40299. Phone: (502) 356-4377. Providers update this record themselves, so call before visiting.
How can I verify Alan Barry Klein, MD's license?
NPPES lists Kentucky license number 24316, 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 Alan Barry Klein, MD prescribe under Medicare Part D?
In 2024, Alan Barry Klein, MD had 1,544 Medicare Part D claims for 90 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.