Maziyar Mirhosseini, M.D.
Internal Medicine Physician · Downers Grove, IL
Maziyar Mirhosseini, M.D. is an internal medicine physician with a practice address in Downers Grove, Illinois, and NPI 1508870809, issued on Jul 29, 2006. Check the license (Illinois 036-110389, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Maziyar Mirhosseini
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036-110389 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3815 Highland Ave, Downers Grove, IL 60515
- Phone
- (312) 609-0300
- Enumerated
- Jul 29, 2006
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20041029000902); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 3815 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sadiqa Abbas, M.D.Interventional Pain Medicine Physician1528010634
- Nicole Ahrens, CRNACertified Registered Nurse Anesthetist1578154340
- Aristides Alexander, M.D.Emergency Medicine Physician1881009082
- Yorleni Ambrosio, RN, CNSNeonatal Intensive Care Registered Nurse1720465065
- Manisa Baker, APNAcute Care Clinical Nurse Specialist1023479508
- Michelle BankheadSurgical Assistant1568921039
Verify Maziyar Mirhosseini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-110389Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
179 Medicare Part D claims for 89 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Pantoprazole Sodium16 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
- Advocate Health And Hospitals CorporationBuffalo Grove, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maziyar Mirhosseini among 7,238 internal medicine physician records in Illinois
Maziyar Mirhosseini, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1996 · median 2003 among the 3,580 with a school on file
- Record last updated2021 · 47% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 internal medicine physician records list a practice address in Downers Grove
They are 33 of the 1,899 NPPES records with a practice address in Downers Grove, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Downers Grove → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Susan Badri, M.D.Downers Grove, IL 605151912985722
- Gigi Ip, MDDowners Grove, IL 605151376519777
- Robert King, MDDowners Grove, IL 605151104892041
- David Labotka, MDDowners Grove, IL 605151205803178
- Barbara Loeb, MDDowners Grove, IL 605151619976396
- Monica Martin, MDDowners Grove, IL 605151881693315
- Richard McPartlin, MDDowners Grove, IL 605151700853140
- Steven Schmitz, MDDowners Grove, IL 605151720056302
Common questions
What is Maziyar Mirhosseini, M.D.'s NPI number?
Maziyar Mirhosseini, M.D.'s National Provider Identifier (NPI) is 1508870809, issued on Jul 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maziyar Mirhosseini, M.D. located?
The NPPES record lists a practice address at 3815 Highland Ave, Downers Grove, IL, 60515. Phone: (312) 609-0300. Providers update this record themselves, so call before visiting.
How can I verify Maziyar Mirhosseini, M.D.'s license?
NPPES lists Illinois license number 036-110389, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maziyar Mirhosseini, M.D. prescribe under Medicare Part D?
In 2024, Maziyar Mirhosseini, M.D. had 179 Medicare Part D claims for 89 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.