John Philip Mesmer, M.D.
Emergency Medicine Physician · Oak Ridge, TN
John Philip Mesmer, M.D. is an emergency medicine physician with a practice address in Oak Ridge, Tennessee, and NPI 1518914951, issued on May 30, 2006. Check the license (Tennessee 020154, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Philip Mesmer
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 020154 TN
Self-reported in NPPES; status is on the state search - Practice location
- 990 Oak Ridge Tpke, Oak Ridge, TN 37830
- Phone
- (865) 481-1000
- Enumerated
- May 30, 2006
- Record last updated
- Nov 29, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 3068883 TN
- Medicare enrollment
- Enrolled (PECOS I20041123000194); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,174 in Tennessee → Look up another NPI →
Also registered at 990 Oak Ridge Tpke
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jacob Agner, DOEmergency Medicine Physician1285212100
- Charles Ashley, D.PH.Pharmacist1932136124
- Cindy Ayo, OTD, OTR/LOccupational Therapist1083778757
- Nawras Baban, M.D.Internal Medicine Physician1225075021
- Dell Bailey, CRNACertified Registered Nurse Anesthetist1316197882
- Jeff Baker, D.PH.Pharmacist1851311351
Verify John Philip Mesmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 020154Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average emergency medicine physician in 2024
507 Medicare Part D claims for 333 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 100 claims were for opioids.
Most prescribed
- Prednisone56 claims
- Ondansetron Odt44 claims
- Hydrocodone-Acetaminophen43 claims
- Cephalexin37 claims
- Oxycodone-Acetaminophen35 claims
- Cefdinir18 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): 83.3 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).
Bills Medicare through one group practice
- Southeastern Emergency Physicians LLCKnoxville, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Philip Mesmer among 1,174 emergency medicine physician records in Tennessee
John Philip Mesmer, M.D. is one of 1,174 emergency medicine physician records with a practice address in Tennessee. 83% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1988 · median 2012 among the 667 with a school on file
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Tennessee
There are 1,174 emergency medicine physician records in Tennessee.
All 1,174 in Tennessee → Every provider in Oak Ridge → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jacob Agner, DOOak Ridge, TN 378301285212100
- James Eppert, M.D.Oak Ridge, TN 378301184752024
- Anthony Garton, M.D.Oak Ridge, TN 378301790726891
- Michael Lapaglia, M.D.Oak Ridge, TN 378301902020548
- Jennifer Mozingo, M.D.Oak Ridge, TN 378301710928395
- Joseph Palatinus, M.D.Oak Ridge, TN 378301982645248
- Elizabeth Rees, MDOak Ridge, TN 378301093940413
- Chukwuma Umunakwe, M.D.Oak Ridge, TN 378301013276815
Common questions
What is John Philip Mesmer, M.D.'s NPI number?
John Philip Mesmer, M.D.'s National Provider Identifier (NPI) is 1518914951, issued on May 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Philip Mesmer, M.D. located?
The NPPES record lists a practice address at 990 Oak Ridge Tpke, Oak Ridge, TN, 37830. Phone: (865) 481-1000. Providers update this record themselves, so call before visiting.
How can I verify John Philip Mesmer, M.D.'s license?
NPPES lists Tennessee license number 020154, 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 Philip Mesmer, M.D. prescribe under Medicare Part D?
In 2024, John Philip Mesmer, M.D. had 507 Medicare Part D claims for 333 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is John Philip Mesmer, M.D.'s MIPS final score?
The 2023 MIPS final score is 83.3 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.