Antoine Sassine
Internal Medicine Physician · Grand Rapids, MI
Antoine Sassine is an internal medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1700403268, issued on Jul 1, 2020. Check the license (Michigan 4301518035, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Antoine Sassine
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301518035 MI
Self-reported in NPPES; status is on the state search - Practice location
- 300 Lafayette Ave SE Ste 3000, Grand Rapids, MI 49503
- Phone
- (616) 685-6919
- Enumerated
- Jul 1, 2020
- Record last updated
- May 26, 2026
- Medicare enrollment
- Enrolled (PECOS I20260527002483); may accept Medicare assignment
- Medical or professional school
- Central Michigan College Of Medicine, 2023
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 300 Lafayette Ave SE Ste 3000
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Antoine Sassine in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301518035Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
223 Medicare Part D claims for 78 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Atorvastatin Calcium17 claims
- Clopidogrel12 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.
Antoine Sassine among 5,735 internal medicine physician records in Michigan
Antoine Sassine 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 2020, is newer than 79% of them.
- NPI issued2020 · 79% of these records are older, 17% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2023 · median 2006 among the 3,564 with a school on file
- Record last updated2026 · 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).
451 internal medicine physician records list a practice address in Grand Rapids
They are 451 of the 18,005 NPPES records with a practice address in Grand Rapids, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Grand Rapids → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Patricia Lagrand, MDGrand Rapids, MI 495031215931258
- Gerald Lee, MDGrand Rapids, MI 495031265437420
Common questions
What is Antoine Sassine's NPI number?
Antoine Sassine's National Provider Identifier (NPI) is 1700403268, issued on Jul 1, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Antoine Sassine located?
The NPPES record lists a practice address at 300 Lafayette Ave SE Ste 3000, Grand Rapids, MI, 49503. Phone: (616) 685-6919. Providers update this record themselves, so call before visiting.
How can I verify Antoine Sassine's license?
NPPES lists Michigan license number 4301518035, 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 Antoine Sassine prescribe under Medicare Part D?
In 2024, Antoine Sassine had 223 Medicare Part D claims for 78 beneficiaries; 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.