Robert Lee Knox, M.D.
Gastroenterology Physician · Murfreesboro, TN
Robert Lee Knox, M.D. is a gastroenterology physician with a practice address in Murfreesboro, Tennessee, and NPI 1457349425, issued on Oct 12, 2005. Check the license (Tennessee 20879, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Robert Lee Knox
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 20879 TN
Self-reported in NPPES; status is on the state search - Practice location
- 1272 Garrison Dr, Murfreesboro, TN 37129
- Phone
- (615) 867-8070
- Enumerated
- Oct 12, 2005
- Record last updated
- Jun 26, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (615) 867-8073
- Medicaid ID
- 3082146 TN
- Medicare enrollment
- Enrolled (PECOS I20101104000989); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 384 in Tennessee → Look up another NPI →
Also registered at 1272 Garrison Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Lee Knox in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 20879Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% more Medicare Part D claims than the average gastroenterology physician in 2024
1,293 Medicare Part D claims for 303 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Omeprazole374 claims
- Pantoprazole Sodium141 claims
- Famotidine46 claims
- Linzess37 claims
- Diphenoxylate-Atropine36 claims
- Esomeprazole Magnesium36 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.
The MIPS final score for 2023 (Medicare payment program): 92.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,114.57
155 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Murfreesboro Medical Clinic, P.A.Murfreesboro, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Lee Knox among 384 gastroenterology physician records in Tennessee
Robert Lee Knox, M.D. is one of 384 gastroenterology physician records with a practice address in Tennessee. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 74% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1989 · median 2001 among the 255 with a school on file
- Record last updated2020 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Tennessee
There are 384 gastroenterology physician records in Tennessee.
All 384 in Tennessee → Every provider in Murfreesboro → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Kenneth CarpenterMurfreesboro, TN 371291497761373
- Paul Dotherow, MDMurfreesboro, TN 371291376076794
- Roland Garretson, MDMurfreesboro, TN 371291568406783
- Roy Hood, M.D.Murfreesboro, TN 371291427046499
- Robert Ingle, M.D.Murfreesboro, TN 371291740278712
- Cregan Laborde, M.D.Murfreesboro, TN 371291790929933
- William Sutton, MDMurfreesboro, TN 371291528126810
- Thomas Catron, MDMurfreesboro, TN 371301851787931
Common questions
What is Robert Lee Knox, M.D.'s NPI number?
Robert Lee Knox, M.D.'s National Provider Identifier (NPI) is 1457349425, issued on Oct 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert Lee Knox, M.D. located?
The NPPES record lists a practice address at 1272 Garrison Dr, Murfreesboro, TN, 37129. Phone: (615) 867-8070. Providers update this record themselves, so call before visiting.
How can I verify Robert Lee Knox, M.D.'s license?
NPPES lists Tennessee license number 20879, 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 Robert Lee Knox, M.D. prescribe under Medicare Part D?
In 2024, Robert Lee Knox, M.D. had 1,293 Medicare Part D claims for 303 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Robert Lee Knox, M.D.'s MIPS final score?
The 2023 MIPS final score is 92.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.