William P. Grabenstein, M.D.
Family Medicine Physician · Clarksville, TN
William P. Grabenstein, M.D. is a family medicine physician with a practice address in Clarksville, Tennessee, and NPI 1003013160, issued on Jun 29, 2007. Check the license (Tennessee MD017935, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William P. Grabenstein
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD017935 TN
Self-reported in NPPES; status is on the state search - Practice location
- 1822 Memorial Dr, Clarksville, TN 37043
- Phone
- (931) 552-8012
- Enumerated
- Jun 29, 2007
- Record last updated
- Jul 29, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (931) 551-3118
- Medicaid ID
- 3728817 TN
- Medicare enrollment
- Enrolled (PECOS I20050419001400); may accept Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,674 in Tennessee → Look up another NPI →
Also registered at 1822 Memorial Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tonya Krantz, PA-CPhysician Assistant1457558512
Verify William P. Grabenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD017935Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% more Medicare Part D claims than the average family medicine physician in 2024
6,135 Medicare Part D claims for 255 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. 436 claims were for opioids.
Most prescribed
- Levothyroxine Sodium252 claims
- Prednisone224 claims
- Atorvastatin Calcium223 claims
- Alprazolam203 claims
- Azithromycin151 claims
- Gabapentin148 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.
William P. Grabenstein among 2,674 family medicine physician records in Tennessee
William P. 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 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 39% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1985 · median 2004 among the 1,685 with a school on file
- Record last updated2015 · 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).
46 family medicine physician records list a practice address in Clarksville
They are 46 of the 3,514 NPPES records with a practice address in Clarksville, and 2,674 family medicine physician records in Tennessee.
All 2,674 in Tennessee → Every provider in Clarksville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Brian Adrian, M.D.Clarksville, TN 370431508092305
- David Boles, DOClarksville, TN 370431255342358
- Amanda Cummins, DOClarksville, TN 370431477846681
- Thomas Ely, D.O.Clarksville, TN 370431083601827
- Gregory Fryer, M.D.Clarksville, TN 370431326013566
- David Haase, MDClarksville, TN 370431457330771
- Beverly Johnson, MDClarksville, TN 370431669489639
- David Johnson, MDClarksville, TN 370431295882348
Common questions
What is William P. Grabenstein, M.D.'s NPI number?
William P. Grabenstein, M.D.'s National Provider Identifier (NPI) is 1003013160, issued on Jun 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William P. Grabenstein, M.D. located?
The NPPES record lists a practice address at 1822 Memorial Dr, Clarksville, TN, 37043. Phone: (931) 552-8012. Providers update this record themselves, so call before visiting.
How can I verify William P. Grabenstein, M.D.'s license?
NPPES lists Tennessee license number MD017935, 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 William P. Grabenstein, M.D. prescribe under Medicare Part D?
In 2024, William P. Grabenstein, M.D. had 6,135 Medicare Part D claims for 255 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.