Dr. Joseph Clarence Marek, MD

Dr. Marek practices at Advocate Medical Group in Downers Grove, Illinois.

Dr. Marek's NPI, 1548216302, was assigned on May 25, 2006. Dr. Marek graduated from Loyola University of Chicago, Stritch School of Medicine in 1975. Dr. Marek holds Illinois license 036059600.

Dr. Marek's primary practice is Advocate Medical Group, at 3825 Highland Ave, Downers Grove, IL 60515 in Dupage County. The practice phone is (847) 390-5900.

Dr. Marek's primary practice is Advocate Medical Group in Downers Grove, Illinois. Dr. Marek is also affiliated with Advocate Good Samaritan Hospital. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Dr. Marek to 4 more hospitals, 2 group practices and clinics, 2 medical groups and 1 physician office, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marek practices, 8 sites in all. Vendor and product names are available with a free account.

Cardiovascular disease is Dr. Marek's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Marek is licensed in Illinois.

CMS data shows 1,021 Medicare services from Dr. Marek across 11 procedure codes in 2024, for 402 Medicare patients. Medicare paid $96,152 for them. Every service was in an office.

CMS counts 402 Medicare patients who saw Dr. Marek in 2024. The largest group is 75 to 84, with 163 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 3% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Marek's median patient age at 76, with 44% women.

In 2024, Dr. Marek wrote 3,663 Medicare Part D claims for 421 patients. 94% of them were for generic drugs. CMS names the drug for 3,465 of them, across 43 drugs with 11 or more claims each, at $300,211 in total drug cost. In 2023, CMS named 3,314 claims across 41 drugs.

Dr. Marek accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 11 papers to Dr. Marek, published from 2011 to 2020. 2013 was the busiest year, with 2. The most frequent topics are Death, Sudden, Cardiac, Athletes and Electrocardiography. Dr. Marek has published most often in Br J Sports Med. Dr. Marek's most frequent co-authors are Jonathan Adam Drezner, David S. Owens, MD and Jordan M. Prutkin, MD, MHS.

CMS Open Payments shows 32 general payments to Dr. Marek from 12 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 59% of the total. Bristol-Myers Squibb Company paid the most, $17,351.

Dr. Marek graduated from Loyola University of Chicago, Stritch School of Medicine in 1975.