DR. DARREN A KASTIN (M.D.) – Gastroenterology Physician, NPI 1164402244
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. DARREN A KASTIN (M.D.)
1243, Rickert Drive, Naperville, DuPage County, Illinois, 60540, United States
NAPERVILLE, IL 605400954
Phone: (630) 527-6450
Fax: (630) 527-6456
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 1 Open Payments records for all available years, with a total value of $3,350.
Total Amount is formed as General ($3,350) + Research ($0) + Ownership ($0) = $3,350.
Last reported payment date: 2023-10-11 • Largest payer in this snapshot: Ferring Pharmaceuticals Inc. ($3,350).
Total Amount
$3,350
General + Research + Ownership
Payments
1
Total payment records
General Amount
$3,350
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-10-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Ferring Pharmaceuticals Inc. | $3,350 |
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: 2004-04-16
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 |
|---|---|---|---|---|
| I20040416000112 | 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 |
|---|---|---|---|---|
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 140 | 140 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 80 | 78 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 52 | 42 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 38 | 38 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 37 | 31 | $0 |
Insurance plans in this area (ZIP 60540)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| Nurse Practitioner | IL | |
| G A S T R O E N T E R O L O G Y | IL | |
| Nurse Practitioner | IL | |
| Nurse Practitioner | IL | |
| Gastroenterology, Internal Medicine | KY | |
| Nurse Practitioner | IL | |
| - | IL | |
| Nurse Practitioner | IL | |
| Nurse Practitioner | IL |
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