JOSEPH CLARENCE MAREK MD
NPI 1548216302
Internal Medicine - Cardiovascular Disease in Downers Grove, IL

Q: What is Joseph Marek's NPI number?

The NPI number for Joseph Marek is 1548216302. It was assigned to this individual provider in the NPPES registry on May 25, 2006.

Q: What is Joseph Marek's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Joseph Marek was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 25, 2006PECOS EnrolledAccepts Medicare Assignment

3825 HIGHLAND AVE, TOWER 2 SUITE 400, DOWNERS GROVE, IL 60515(630) 719-4799 Get Directions Write a Review

NPPES record last updated: April 15, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Joseph Clarence Marek Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOSEPH CLARENCE MAREK MD (NPI 1548216302) is an individual cardiovascular disease provider in Downers Grove, Illinois, licensed in Illinois (036059600) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Morris Hospital & Healthcare Centers, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1548216302

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameJOSEPH CLARENCE MAREKCredential: MD

Location Address3825 HIGHLAND AVE, TOWER 2 SUITE 400Downers Grove, IL 60515-1552

Mailing Address29373 Network PlChicago, IL 60673-1293 · (847) 390-5900

Phone(630) 719-4799

Sole ProprietorNo

Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 1975

Enumeration DateMay 25, 2006

Last NPPES UpdateApril 15, 2025

NPPES CertifiedApril 15, 2025

✔ NPI 1548216302 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in IL · 036059600

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

3825 HIGHLAND AVE, Downers Grove, IL 60515

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Secondary Practice Locations 2

Location 13743 Highland Ave Ste 1002Downers Grove, IL 60515-1594 · Phone (630) 719-4799 · Fax (630) 785-2127

Location 21512 N Naper Blvd Ste 176Naperville, IL 60563-9369 · Phone (630) 527-2730 · Fax (630) 527-2754

Other Identifiers 2

Medicaid036059600IL

Other060015699Railroad Medicare

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Joseph Clarence Marek Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID143132886

PECOS Enrollment IDI20040602001541

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

469 services292 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

99 services91 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

93 services86 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

91 services66 patients

Heart muscle strain imaging 93356

Heart muscle strain imaging is a non-invasive test that uses sound waves to create pictures of your heart. It helps doctors evaluate how well your heart muscle is working and detect any damage or disease. This can aid in diagnosing heart conditions and guiding treatment plans.

91 services84 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

51 services46 patients

3d radiographic procedure 76376

A 3D radiographic procedure is a non-invasive imaging test that helps doctors visualize the internal structures of your body in three dimensions. This advanced technology provides detailed images, aiding in accurate diagnosis and treatment planning. It involves exposure to minimal radiation.

45 services43 patients

Test for exercise-induced heart and lung stress 94621

This is a test to evaluate how your heart and lungs respond to physical exertion. You'll exercise on a treadmill or a stationary bike, while your heart rate, breathing, blood pressure, and fatigue levels are monitored. This helps identify any abnormal responses to physical activity.

33 services31 patients

Ambulatory blood pressure monitoring, 1 day or longer, with recording, scanning analysis, interpretation, and report 93784

Ambulatory blood pressure monitoring is a test that keeps track of your blood pressure over 24 hours or more. A small device, worn on a belt, takes readings at set intervals. This data is analyzed to give a comprehensive report on your blood pressure patterns.

21 services21 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

14 services14 patients

Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturation G0399

A Home Sleep Test (HST) with a Type III Portable Monitor is an unattended test that records your breathing, heart rate, and oxygen levels during sleep. This test uses a minimum of 4 channels to monitor these parameters, helping to diagnose sleep disorders.

14 services12 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Morris Hospital & Healthcare Centers

Acute Care Hospitals · Morris, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140101

Location150 W High StMorris, IL 60450 · Grundy County

Emergency services Birthing friendly

Elmhurst Memorial Hospital

Acute Care Hospitals · Elmhurst, IL

4/5 CMS rating

OwnershipProprietary

CMS Certification Number140200

Location155 East Brush Hill RoadElmhurst, IL 60126 · Du Page County

Emergency services Birthing friendly

Edward Hospital

Acute Care Hospitals · Naperville, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140231

Location801 South WashingtonNaperville, IL 60540 · Du Page County

Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140242

Location25 North Winfield RoadWinfield, IL 60190 · Du Page County

Emergency services Birthing friendly

Advocate Good Samaritan Hospital

Acute Care Hospitals · Downers Grove, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140288

Location3815 Highland AvenueDowners Grove, IL 60515 · Du Page County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60515 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$137.43 typical visit price

range $59.81 – $181.38

Typical copayment $34.35 (range $14.95 – $45.34)

Most-billed visit code 99204

Established Patient

$74.38 typical visit price

range $19.15 – $147.12

Typical copayment $18.59 (range $4.78 – $36.78)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PETER MICHAEL KERWIN MD

Internal Medicine (Interventional Cardiology)

3825 HIGHLAND AVE, TOWER 2 SUITE 400
DOWNERS GROVE, IL 60515

Dupage County (630) 719-4799

BARRY SADEGI M.D.

Obstetrics & Gynecology (Maternal & Fetal Medicine)

3825 HIGHLAND AVE, 3B
DOWNERS GROVE, IL 60515

Dupage County (630) 434-9300

STEPHEN MICHAEL ROWLEY MD

Internal Medicine (Cardiovascular Disease)

3825 HIGHLAND AVE, TOWER 2 SUITE 400
DOWNERS GROVE, IL 60515

Dupage County (630) 719-4799

DR. KOTESWARA RAO BATCHU M.D.

Legal Medicine

3825 HIGHLAND AVE, SUITE 4B
DOWNERS GROVE, IL 60515

Dupage County (630) 963-4990

BARRY SADEGI, M.D., S.C.

Obstetrics & Gynecology

3825 HIGHLAND AVE, 3B
DOWNERS GROVE, IL 60515

Dupage County (630) 434-9300

DR. PAUL J WEST M.D.

Urology

3825 HIGHLAND AVE, SUITE 207
DOWNERS GROVE, IL 60515

Dupage County (630) 960-1498

DR. CYNTHIA ANN WOLLENSCHLAGER M.D.

Internal Medicine (Infectious Disease)

3825 HIGHLAND AVE, TOWER I, SUITE 3F
DOWNERS GROVE, IL 60515

Dupage County (630) 971-9275

MATTHEW OSCEOLA NORA MD

Internal Medicine (Clinical Cardiac Electrophysiology)

3825 HIGHLAND AVE, TOWER 2 SUITE 400
DOWNERS GROVE, IL 60515

Dupage County (630) 719-4799

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joseph Marek's NPI number?

The NPI number for Joseph Marek is 1548216302. It was assigned to this individual provider in the NPPES registry on May 25, 2006.

Where is Joseph Marek located?

Joseph Marek practices at 3825 Highland Ave Tower 2 Suite 400, Downers Grove, IL 60515. The listed phone number is (630) 719-4799.

What is Joseph Marek's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Joseph Marek enrolled in Medicare?

Yes. Joseph Marek is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Joseph Marek accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Joseph Marek as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Joseph Marek affiliated with any hospitals?

According to CMS data, Joseph Marek is affiliated with Morris Hospital & Healthcare Centers, Elmhurst Memorial Hospital, Edward Hospital, Northwestern Medicine Central Dupage Hospital and Advocate Good Samaritan Hospital.

When was this NPI record last updated?

The NPPES record for Joseph Marek was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.