Jeffrey John Grabenstein, M.D.
Family Medicine Physician · Oak Ridge, TN
Jeffrey John Grabenstein, M.D. is a family medicine physician with a practice address in Oak Ridge, Tennessee, and NPI 1639277494, issued on Sep 20, 2006. Check the license (Tennessee MD0000030688, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Jeffrey John Grabenstein
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD0000030688 TN
Self-reported in NPPES; status is on the state search - Practice location
- 400 Laboratory RD Ste 101, Oak Ridge, TN 37830
- Phone
- (865) 482-1692
- Enumerated
- Sep 20, 2006
- Record last updated
- Oct 9, 2024
- Fax
- (865) 482-4070
- Medicaid ID
- 3836002 TN
- Medicare enrollment
- Enrolled (PECOS I20101118000760); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,674 in Tennessee → Look up another NPI →
Also registered at 400 Laboratory RD Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Diane Fabricius, M.D.Family Medicine Physician1578663084
Verify Jeffrey John Grabenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD0000030688Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average family medicine physician in 2024
2,331 Medicare Part D claims for 172 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 43 claims were for opioids.
Most prescribed
- Levothyroxine Sodium127 claims
- Losartan Potassium72 claims
- Liothyronine Sodium70 claims
- Tamsulosin Hcl64 claims
- Clonazepam62 claims
- Azithromycin46 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
- Family Doctors OF Oak Ridge, PCOak Ridge, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jeffrey John Grabenstein among 2,674 family medicine physician records in Tennessee
Jeffrey John Grabenstein, 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
- Graduated1980 · median 2004 among the 1,685 with a school on file
- Record last updated2024 · 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).
38 family medicine physician records list a practice address in Oak Ridge
They are 38 of the 904 NPPES records with a practice address in Oak Ridge, and 2,674 family medicine physician records in Tennessee.
All 2,674 in Tennessee → Every provider in Oak Ridge → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Elizabeth Azel, MDOak Ridge, TN 378301396794392
- William Bell, M.D.Oak Ridge, TN 378301659353647
- Pamela Bridgeman, MDOak Ridge, TN 378301174559652
- David Compton, M.D.Oak Ridge, TN 378301184606261
- Shere Conway, M.D.Oak Ridge, TN 378301619959798
- David Heald, M.D.Oak Ridge, TN 378301578545372
- Daniel Lenoir, M.D.Oak Ridge, TN 378301861474967
- Terrence Meece, M.D.Oak Ridge, TN 378301477542033
Common questions
What is Jeffrey John Grabenstein, M.D.'s NPI number?
Jeffrey John Grabenstein, M.D.'s National Provider Identifier (NPI) is 1639277494, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jeffrey John Grabenstein, M.D. located?
The NPPES record lists a practice address at 400 Laboratory RD Ste 101, Oak Ridge, TN, 37830. Phone: (865) 482-1692. Providers update this record themselves, so call before visiting.
How can I verify Jeffrey John Grabenstein, M.D.'s license?
NPPES lists Tennessee license number MD0000030688, 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 Jeffrey John Grabenstein, M.D. prescribe under Medicare Part D?
In 2024, Jeffrey John Grabenstein, M.D. had 2,331 Medicare Part D claims for 172 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.