DR. JAMES RALPH CLARK (M.D.) – Gastroenterology Physician, NPI 1588640650
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
978 GASTROENTEROLOGY in IL
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Provider Addresses for DR. JAMES RALPH CLARK (M.D.)
3825, Highland Avenue, Downers Grove, DuPage County, Illinois, 60515, United States
TOWER 2 - SUITE 302
DOWNERS GROVE, IL 605151552
Phone: (630) 434-9312
Fax: (630) 434-9360
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 132 Open Payments records for all available years, with a total value of $2,693.
Total Amount is formed as General ($2,693) + Research ($0) + Ownership ($0) = $2,693.
Last reported payment date: 2024-12-17 • Largest payer in this snapshot: ABBVIE INC. ($715).
Total Amount
$2,693
General + Research + Ownership
Payments
132
Total payment records
General Amount
$2,693
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-17
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2004-04-09
PECOS data refreshed: 2026-05-27
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 |
|---|---|---|---|---|
| I20040409000124 | I | Gastroenterology | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 388 | 134 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 162 | 119 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 111 | 107 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 110 | 107 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 91 | 91 | $0 |
Insurance plans in this area (ZIP 60515)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | IL | 45385 | Removal of polyps or growths of large bowel using an endoscope | 65 | 65 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | IL | |
| G A S T R O E N T E R O L O G Y | IL | |
| G A S T R O E N T E R O L O G Y | IL | |
| - | IL | |
| Gastroenterology, Internal Medicine | CA | |
| Gastroenterology, Internal Medicine | IL | |
| G A S T R O E N T E R O L O G Y | IL | |
| G A S T R O E N T E R O L O G Y | IL | |
| Nurse Practitioner | IL | |
| Physician Assistant | IL |
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