MARCUS CLARK – Rheumatology Physician, NPI 1790847242
Rheumatology Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
357 RHEUMATOLOGY in IL
Provider Addresses for MARCUS CLARK
5841 S MARYLAND AVE # MC1099
CHICAGO, IL 606371447
Phone:
Type: Mailing
150 HARVESTER DR
SUITE 300
BURR RIDGE, IL 605275919
Phone:
Type: Mailing
5841 S MARYLAND AVE
CHICAGO, IL 606371443
Phone: (888) 824-0200
Type: Location
Harvester Drive, Burr Ridge, DuPage County, Illinois, 65027, United States
BURR RIDGE, IL 605276686
Phone: (773) 834-4064
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $1,581.
Total Amount is formed as General ($1,581) + Research ($0) + Ownership ($0) = $1,581.
Last reported payment date: 2023-08-21 • Largest payer in this snapshot: F. Hoffmann-La Roche AG ($1,581).
Total Amount
$1,581
General + Research + Ownership
Payments
1
Total payment records
General Amount
$1,581
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-08-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| F. Hoffmann-La Roche AG | $1,581 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2011-02-14
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20110214000578 | I | Rheumatology | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 60637)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| N E U R O S U R G E R Y | IL | |
| Emergency Medicine | IL | |
| Pulmonary Disease, Critical Care (Intensivists) | NC | |
| General Surgery | IN | |
| Pediatric Medicine, Emergency Medicine | IL | |
| - | IL | |
| - | IL | |
| Gastroenterology, Internal Medicine | CT | |
| Cardiovascular Disease (Cardiology) | IL | |
| Internal Medicine | IL |
Reviews
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