Marc S. Mastropaolo, DO
Internal Medicine Physician · Ypsilanti, MI
Marc S. Mastropaolo, DO is an internal medicine physician with a practice address in Ypsilanti, Michigan, and NPI 1982667002, issued on Apr 10, 2006. Check the license (Michigan 5101009644, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Marc S. Mastropaolo
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 5101009644 MI
MM009644 MI
Self-reported in NPPES; status is on the state search - Practice location
- Iha Hospital Medicine Services, Ypsilanti, MI 48197
- Phone
- (734) 712-8676
- Enumerated
- Apr 10, 2006
- Record last updated
- Sep 13, 2023
- Fax
- (248) 476-6465
- Medicaid ID
- 4691605 MI
- Medicare enrollment
- Enrolled (PECOS I20041005000040); accepts Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 1986
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at Iha Hospital Medicine Services
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nafis Ahmed, DOInternal Medicine Physician1023637840
- Mays Alatiyat, MDInternal Medicine Physician1497240006
Verify Marc S. Mastropaolo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101009644Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
34 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.
Bills Medicare through one group practice
- Iha Health Services CorporationYpsilanti, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc S. Mastropaolo among 5,735 internal medicine physician records in Michigan
Marc S. Mastropaolo, 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1986 · median 2006 among the 3,564 with a school on file
- 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).
198 internal medicine physician records list a practice address in Ypsilanti
They are 198 of the 3,625 NPPES records with a practice address in Ypsilanti, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Ypsilanti → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sabah Al-Attar, M.DYpsilanti, MI 481971285697821
- Imad Ayyar, M.D.Ypsilanti, MI 481971073515268
- Daniel Cahill, M.D.Ypsilanti, MI 481971801897376
- Jack Carman, M.D.Ypsilanti, MI 481971285635474
- John Hopper, MDYpsilanti, MI 481971184680977
- Eugene Liu, M.D.Ypsilanti, MI 481971770584930
- Shyam Mahesh, M.D.Ypsilanti, MI 481971962407569
- Alvin McCormick, MDYpsilanti, MI 481971578534939
Common questions
What is Marc S. Mastropaolo, DO's NPI number?
Marc S. Mastropaolo, DO's National Provider Identifier (NPI) is 1982667002, issued on Apr 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc S. Mastropaolo, DO located?
The NPPES record lists a practice address at Iha Hospital Medicine Services, Ypsilanti, MI, 48197. Phone: (734) 712-8676. Providers update this record themselves, so call before visiting.
How can I verify Marc S. Mastropaolo, DO's license?
NPPES lists Michigan license number 5101009644, 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 Marc S. Mastropaolo, DO prescribe under Medicare Part D?
In 2024, Marc S. Mastropaolo, DO had 34 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.