Joseph Clarence Marek, MD
Cardiovascular Disease Physician · Downers Grove, IL
Joseph Clarence Marek, MD is a cardiovascular disease physician with a practice address in Downers Grove, Illinois, and NPI 1548216302, issued on May 25, 2006. Check the license (Illinois 036059600, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Joseph Clarence Marek
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 036059600 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3825 Highland Ave, Downers Grove, IL 60515
- Phone
- (630) 719-4799
- Enumerated
- May 25, 2006
- Record last updated
- Apr 15, 2025
- Medicaid ID
- 036059600 IL
- Medicare enrollment
- Enrolled (PECOS I20040602001541); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1975
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,073 in Illinois → Look up another NPI →
Also registered at 3825 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mani Akkineni, M.D.Specialist1467456186
- Medha Amin, MDObstetrics Physician1912197534
- Teresita Avila, M.D.Specialist1386649317
- Lara Bakhos, M.D.Cardiovascular Disease Physician1730336652
- Jennifer Balash, M.D.Obstetrics & Gynecology Physician1487881025
- Shamita Bansore, MDObstetrics & Gynecology Physician1700813771
Verify Joseph Clarence Marek 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 036059600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average cardiovascular disease physician in 2024
3,663 Medicare Part D claims for 421 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Atorvastatin Calcium540 claims
- Irbesartan331 claims
- Metoprolol Succinate263 claims
- Rosuvastatin Calcium244 claims
- Amlodipine Besylate214 claims
- Hydrochlorothiazide154 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.
Industry payments in 2024: $171.55
3 payments; by number, the most common kind was food and beverage; the largest payer was Esperion Therapeutics, Inc. The 16,686 providers of this specialty with any payment received $3,819.56 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Advocate Health And Hospitals CorporationDowners Grove, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Clarence Marek among 1,073 cardiovascular disease physician records in Illinois
Joseph Clarence Marek, MD is one of 1,073 cardiovascular disease physician records with a practice address in Illinois. 85% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 50% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1975 · median 2001 among the 688 with a school on file
- Record last updated2025 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Illinois
There are 1,073 cardiovascular disease physician records in Illinois.
All 1,073 in Illinois → Every provider in Downers Grove → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Lara Bakhos, M.D.Downers Grove, IL 605151730336652
- Patrick Fenner, MDDowners Grove, IL 605151588616585
- Sunil Lulla, M.D.Downers Grove, IL 605151477535201
- Iva Minga, M.D.Downers Grove, IL 605151104357466
- Mahesh Raju, MDDowners Grove, IL 605151811143548
- Stephen Rowley, MDDowners Grove, IL 605151023061108
- Gaile Sabaliauskas, MDDowners Grove, IL 605151326094699
- Mhd Adeeb SebaiDowners Grove, IL 605151740755321
Common questions
What is Joseph Clarence Marek, MD's NPI number?
Joseph Clarence Marek, MD's National Provider Identifier (NPI) is 1548216302, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Clarence Marek, MD located?
The NPPES record lists a practice address at 3825 Highland Ave, Downers Grove, IL, 60515. Phone: (630) 719-4799. Providers update this record themselves, so call before visiting.
How can I verify Joseph Clarence Marek, MD's license?
NPPES lists Illinois license number 036059600, 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 Joseph Clarence Marek, MD prescribe under Medicare Part D?
In 2024, Joseph Clarence Marek, MD had 3,663 Medicare Part D claims for 421 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.