Katherine A. Witherington, MD
Internal Medicine Physician · Louisville, KY
Katherine A. Witherington, MD is an internal medicine physician with a practice address in Louisville, Kentucky, and NPI 1467417147, issued on Apr 18, 2006. Check the license (Kentucky 16816, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Katherine A. Witherington
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 16816 KY
Self-reported in NPPES; status is on the state search - Practice location
- 2355 Poplar Level RD, Louisville, KY 40217
- Phone
- (502) 636-8121
- Enumerated
- Apr 18, 2006
- Record last updated
- May 30, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (502) 636-8128
- Medicaid ID
- 64168164 KY
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,526 in Kentucky → Look up another NPI →
Also registered at 2355 Poplar Level RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine A. Witherington in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 16816Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
16 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Katherine A. Witherington among 1,526 internal medicine physician records in Kentucky
Katherine A. Witherington, 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 updated2019 · 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
- Ryan Fields, MDLouisville, KY 402171235454083
- Philip Fitzgerald, MDLouisville, KY 402171669437166
- William Goldstein, M.D.Louisville, KY 402171336287523
- Patricia Hansen, M.D.Louisville, KY 402171285745612
- William Housworth, MDLouisville, KY 402171477559367
- Max Irick, MDLouisville, KY 402171548317803
- Abbas Khawari, M.D.Louisville, KY 402171194919159
- Kathryn Marshall, M.D.Louisville, KY 402171104898048
Common questions
What is Katherine A. Witherington, MD's NPI number?
Katherine A. Witherington, MD's National Provider Identifier (NPI) is 1467417147, issued on Apr 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katherine A. Witherington, MD located?
The NPPES record lists a practice address at 2355 Poplar Level RD, Louisville, KY, 40217. Phone: (502) 636-8121. Providers update this record themselves, so call before visiting.
How can I verify Katherine A. Witherington, MD's license?
NPPES lists Kentucky license number 16816, 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 Katherine A. Witherington, MD prescribe under Medicare Part D?
In 2024, Katherine A. Witherington, MD had 16 Medicare Part D claims; 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.