Guy Clark, MD
Internal Medicine Physician · Knoxville, TN
Guy Clark, MD is an internal medicine physician with a practice address in Knoxville, Tennessee, and NPI 1235160789, issued on Jul 5, 2006. Check the license (Tennessee MD20063, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Guy Clark
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD20063 TN
0101047497 VA
Self-reported in NPPES; status is on the state search - Practice location
- 601 S Concord St Ste 108, Knoxville, TN 37919
- Phone
- (865) 292-3000
- Enumerated
- Jul 5, 2006
- Record last updated
- May 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid IDs
- Q064419 TN
64666985 KY
010256267 VA - Medicare enrollment
- Enrolled (PECOS I20111121000621); accepts Medicare assignment
- Medical or professional school
- East Tennessee State University Quillen College Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,596 in Tennessee → Look up another NPI →
Verify Guy Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD20063Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
494 Medicare Part D claims for 31 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Buprenorphine-Naloxone293 claims
- Suboxone46 claims
- Ondansetron Odt23 claims
- Nystatin17 claims
- Amlodipine Besylate13 claims
- Bupropion Xl11 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.
Guy Clark among 2,596 internal medicine physician records in Tennessee
Guy Clark, 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 fileYes · 66% of these records are
- Graduated1988 · median 2003 among the 1,705 with a school on file
- Record last updated2021 · 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
- 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
- Julianna Lindsey, M.D.Knoxville, TN 379191225079361
- Jennifer Mosley, MDKnoxville, TN 379191659317691
- Dragos Munteanu, MDKnoxville, TN 379191710922893
Common questions
What is Guy Clark, MD's NPI number?
Guy Clark, MD's National Provider Identifier (NPI) is 1235160789, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Guy Clark, MD located?
The NPPES record lists a practice address at 601 S Concord St Ste 108, Knoxville, TN, 37919. Phone: (865) 292-3000. Providers update this record themselves, so call before visiting.
How can I verify Guy Clark, MD's license?
NPPES lists Tennessee license number MD20063, 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 Guy Clark, MD prescribe under Medicare Part D?
In 2024, Guy Clark, MD had 494 Medicare Part D claims for 31 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.