Donald Keith McKenzie, MD
Internal Medicine Physician · Knoxville, TN
Donald Keith McKenzie, MD is an internal medicine physician with a practice address in Knoxville, Tennessee, and NPI 1043309214, issued on Oct 12, 2006. Check the license (Tennessee MD9573, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Donald Keith McKenzie
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD9573 TN
Self-reported in NPPES; status is on the state search - Practice location
- 3301 Tazewell Pike, Knoxville, TN 37918
- Phone
- (865) 689-7064
- Enumerated
- Oct 12, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (865) 687-7967
- Medicaid ID
- 3379787 TN
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,596 in Tennessee → Look up another NPI →
Verify Donald Keith McKenzie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD9573Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
310 Medicare Part D claims for 23 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Rosuvastatin Calcium23 claims
- Alprazolam18 claims
- Atorvastatin Calcium16 claims
- Omeprazole15 claims
- Simvastatin13 claims
- Levothyroxine Sodium12 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.
Donald Keith McKenzie among 2,596 internal medicine physician records in Tennessee
Donald Keith McKenzie, MD is one of 2,596 internal medicine physician records with a practice address in Tennessee. 80% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 46% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2007 · 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 Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
237 internal medicine physician records list a practice address in Knoxville
They are 237 of the 14,339 NPPES records with a practice address in Knoxville, and 2,596 internal medicine physician records in Tennessee.
All 2,596 in Tennessee → Every provider in Knoxville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Hegerich, M.D.Knoxville, TN 379181013164680
- Jeffrey Summers, MDKnoxville, TN 379181528067816
- Syed Ahmed, MDKnoxville, TN 379171437128899
- Jack Benhayon, MDKnoxville, TN 379191770584898
- Caroline Cooley, MDKnoxville, TN 379191336145069
- Dennis Deruelle, MD, FHMKnoxville, TN 379191265429203
- Zakir Halai, MDKnoxville, TN 379191629076807
- Maria Herman-Gorrondona, MDKnoxville, TN 379191275578353
Common questions
What is Donald Keith McKenzie, MD's NPI number?
Donald Keith McKenzie, MD's National Provider Identifier (NPI) is 1043309214, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald Keith McKenzie, MD located?
The NPPES record lists a practice address at 3301 Tazewell Pike, Knoxville, TN, 37918. Phone: (865) 689-7064. Providers update this record themselves, so call before visiting.
How can I verify Donald Keith McKenzie, MD's license?
NPPES lists Tennessee license number MD9573, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Donald Keith McKenzie, MD prescribe under Medicare Part D?
In 2024, Donald Keith McKenzie, MD had 310 Medicare Part D claims for 23 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.