Grant Clunas, DO
Internal Medicine Physician · Pontiac, MI
Grant Clunas, DO is an internal medicine physician with a practice address in Pontiac, Michigan, and NPI 1255017596, issued on Jun 22, 2023. Check the license (Michigan 5151016111, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Grant Clunas
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 5151016111 MI
Self-reported in NPPES; status is on the state search - Practice location
- 50 N Perry St, Pontiac, MI 48342
- Phone
- (248) 338-5392
- Enumerated
- Jun 22, 2023
- Record last updated
- Jun 22, 2023
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 50 N Perry St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fatma Abdel-Rahim, DPMStudent in an Organized Health Care Education/Training Program1376336206
- Andrew AbiragiStudent in an Organized Health Care Education/Training Program1003753054
- John Abraham, MDStudent in an Organized Health Care Education/Training Program1952045478
- Tina Abraham, D.O.Internal Medicine Physician1215376108
- Mahmoud Abu HajerStudent in an Organized Health Care Education/Training Program1275470221
- Nicole AdamOccupational Therapist1730676917
Verify Grant Clunas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5151016111Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
13 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Grant Clunas among 5,735 internal medicine physician records in Michigan
Grant Clunas, DO is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 90% of them.
- NPI issued2023 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2023 · 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 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
115 internal medicine physician records list a practice address in Pontiac
They are 115 of the 1,951 NPPES records with a practice address in Pontiac, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Pontiac → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Tina Abraham, D.O.Pontiac, MI 483421215376108
- Amrullah Alsatli, MDPontiac, MI 483421285014613
- Maria Anders, D.O.Pontiac, MI 483421619106176
- Steven Calkin, D.O.Pontiac, MI 483421992728356
- Lawrence Cowsill, D.O.Pontiac, MI 483421598788176
- Erica Di Cicco, D.O.Pontiac, MI 483421104139450
- Richard Keirn, MDPontiac, MI 483421801937644
- Joanne La Fleur, M.D.Pontiac, MI 483421629332630
Common questions
What is Grant Clunas, DO's NPI number?
Grant Clunas, DO's National Provider Identifier (NPI) is 1255017596, issued on Jun 22, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Grant Clunas, DO located?
The NPPES record lists a practice address at 50 N Perry St, Pontiac, MI, 48342. Phone: (248) 338-5392. Providers update this record themselves, so call before visiting.
How can I verify Grant Clunas, DO's license?
NPPES lists Michigan license number 5151016111, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Grant Clunas, DO prescribe under Medicare Part D?
In 2024, Grant Clunas, DO had 13 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.