Joseph Marek, MD
NPI 1548216302 · Cardiovascular Disease Physician · Downers Grove, IL
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Marek, MD is a Cardiovascular Disease Physician provider in Downers Grove, IL (NPI 1548216302).
Provider details
- NPI number
- 1548216302
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036059600 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,021 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 469 | $183 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 99 | $128 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 93 | $191 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 91 | $8 |
| Heart Muscle Strain Imaging93356 | 91 | $37 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 540 | 155 |
| Irbesartan | 331 | 90 |
| Metoprolol Succinate | 263 | 81 |
| Rosuvastatin Calcium | 244 | 72 |
| Amlodipine Besylate | 214 | 62 |
| Hydrochlorothiazide | 154 | 50 |
| Lisinopril | 154 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$172 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 3743 Highland Ave Ste 1002Downers Grove, IL 60515-1594Phone: (630) 719-4799Fax: (630) 785-2127
- 1512 N Naper Blvd Ste 176Naperville, IL 60563-9369Phone: (630) 527-2730Fax: (630) 527-2754
Registry dates
- Enumerated
- 2006-05-25
- Last updated
- 2025-04-15
- Certified
- 2025-04-15
Frequently asked questions
- What is Joseph Marek's NPI number?
- Joseph Marek's National Provider Identifier (NPI) is 1548216302, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Marek's specialty?
- Joseph Marek is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Marek located?
- Joseph Marek's practice location on file with NPPES is 3825 Highland Ave, Downers Grove, IL 60515-1552.
- What is Joseph Marek's phone number?
- The practice phone number listed in the NPPES registry for Joseph Marek is (630) 719-4799.
- Does Joseph Marek accept Medicare?
- Joseph Marek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Marek's NPI active?
- Yes — Joseph Marek's NPI (1548216302) is active in the NPPES registry as of the last update on 2025-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.