Caleb Warren, M.D.
Family Medicine Physician · Knoxville, TN
Caleb Warren, M.D. is a family medicine physician with a practice address in Knoxville, Tennessee, and NPI 1801861786, issued on Feb 22, 2006. Check the license (Tennessee MD028800, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Caleb Warren
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD028800 TN
Self-reported in NPPES; status is on the state search - Practice location
- 3403 Tazewell Pike, Knoxville, TN 37918
- Phone
- (865) 689-9966
- Enumerated
- Feb 22, 2006
- Record last updated
- Jul 15, 2026
- Fax
- (865) 689-0910
- Medicaid ID
- 3827019 TN
- Medicare enrollment
- Enrolled (PECOS I20080307000508); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,674 in Tennessee → Look up another NPI →
Verify Caleb Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD028800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average family medicine physician in 2024
11,383 Medicare Part D claims for 738 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 477 claims were for opioids.
Most prescribed
- Gabapentin507 claims
- Atorvastatin Calcium478 claims
- Omeprazole411 claims
- Levothyroxine Sodium342 claims
- Meloxicam280 claims
- Amlodipine Besylate252 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
- Covenant Medical Group IncLoudon, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Caleb Warren among 2,674 family medicine physician records in Tennessee
Caleb Warren, M.D. is one of 2,674 family medicine physician records with a practice address in Tennessee. 81% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 48% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1998 · median 2004 among the 1,685 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
244 family medicine physician records list a practice address in Knoxville
They are 244 of the 14,339 NPPES records with a practice address in Knoxville, and 2,674 family medicine physician records in Tennessee.
All 2,674 in Tennessee → Every provider in Knoxville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Katherine Bellmore, MDKnoxville, TN 379181447690722
- William Dedmon, DOKnoxville, TN 379181871054668
- Jeffrey Drinnen, MDKnoxville, TN 379181437193851
- Christian FrancisKnoxville, TN 379181780247262
- Kathy Franklin, M.D.Knoxville, TN 379181295715407
- Alan Haney, MDKnoxville, TN 379181700199981
- Thomas Haskins, MDKnoxville, TN 379181558303198
- Leandrea Lockridge, M.D.Knoxville, TN 379181891952602
Common questions
What is Caleb Warren, M.D.'s NPI number?
Caleb Warren, M.D.'s National Provider Identifier (NPI) is 1801861786, issued on Feb 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Caleb Warren, M.D. located?
The NPPES record lists a practice address at 3403 Tazewell Pike, Knoxville, TN, 37918. Phone: (865) 689-9966. Providers update this record themselves, so call before visiting.
How can I verify Caleb Warren, M.D.'s license?
NPPES lists Tennessee license number MD028800, 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 Caleb Warren, M.D. prescribe under Medicare Part D?
In 2024, Caleb Warren, M.D. had 11,383 Medicare Part D claims for 738 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.