John D. Cowan, M.D.
Medical Oncology Physician · Maryville, TN
John D. Cowan, M.D. is a medical oncology physician with a practice address in Maryville, Tennessee, and NPI 1629046545, issued on Mar 8, 2006. Check the license (Tennessee MD0000009032, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John D. Cowan
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- MD0000009032 TN
9032 TN
Self-reported in NPPES; status is on the state search - Practice location
- 907 E Lamar Alexander Pkwy, Maryville, TN 37804
- Phone
- (865) 977-4641
- Enumerated
- Mar 8, 2006
- Record last updated
- Dec 13, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (865) 977-4787
- Medicaid ID
- 3198088 TN
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 114 in Tennessee → Look up another NPI →
Also registered at 907 E Lamar Alexander Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amanda Absher, PA-CPhysician Assistant1144430794
- Melissa AmblerAdult Health Nurse Practitioner1386033652
- Crystal Aycocke, CRNACertified Registered Nurse Anesthetist1174918759
- Laronda Beam, FNP-BCFamily Nurse Practitioner1871520429
- Breanna Beck, PA-CPhysician Assistant1699093286
- Brittney Bell, CRNACertified Registered Nurse Anesthetist1679974752
Verify John D. Cowan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD0000009032Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average medical oncology physician in 2024
31 Medicare Part D claims for 22 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Mupirocin20 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.
John D. Cowan among 114 medical oncology physician records in Tennessee
John D. Cowan, M.D. is one of 114 medical oncology physician records with a practice address in Tennessee. 82% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 45% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2011 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Tennessee
There are 114 medical oncology physician records in Tennessee.
All 114 in Tennessee → Every provider in Maryville → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Sajid Ahmed, MDMorristown, TN 378141497858591
- Muhammad Naqvi, M.DMorristown, TN 378141316269533
- Mailien Rogers, D.O.Morristown, TN 378141043408578
- Darrell Johnson, MDSevierville, TN 378621285682179
- Devapiran Jaishankar, M.D.Greeneville, TN 377451225038490
- Tracy Dobbs, MDKnoxville, TN 379091104826148
- David Chism, MDKnoxville, TN 379161972805414
- Neil Faulkner, M.D., PH.D.Knoxville, TN 379161417165739
Common questions
What is John D. Cowan, M.D.'s NPI number?
John D. Cowan, M.D.'s National Provider Identifier (NPI) is 1629046545, issued on Mar 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John D. Cowan, M.D. located?
The NPPES record lists a practice address at 907 E Lamar Alexander Pkwy, Maryville, TN, 37804. Phone: (865) 977-4641. Providers update this record themselves, so call before visiting.
How can I verify John D. Cowan, M.D.'s license?
NPPES lists Tennessee license number MD0000009032, 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 John D. Cowan, M.D. prescribe under Medicare Part D?
In 2024, John D. Cowan, M.D. had 31 Medicare Part D claims for 22 beneficiaries; the average among medical oncology physician prescribers was 703. 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.