MICHAEL J ZEREGA (MD) – Gastroenterology Physician, NPI 1073505178
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
489 GASTROENTEROLOGY in MO
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Provider Addresses for MICHAEL J ZEREGA (MD)
200, Brevco Plaza, Lake Saint Louis, Saint Charles County, Missouri, 63367, United States
SUITE 208
LAKE ST LOUIS, MO 633672949
Phone: (636) 561-9020
Fax: (636) 561-6208
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 3 Open Payments records for all available years, with a total value of $73.
Total Amount is formed as General ($73) + Research ($0) + Ownership ($0) = $73.
Last reported payment date: 2024-09-17 • Largest payer in this snapshot: Medtronic, Inc. ($29).
Total Amount
$73
General + Research + Ownership
Payments
3
Total payment records
General Amount
$73
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Medtronic, Inc. | $29 |
| ABBVIE INC. | $25 |
| PFIZER INC. | $19 |
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: 2005-12-15
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 |
|---|---|---|---|---|
| I20051215000647 | I | Gastroenterology | MO | 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 | 143 | 143 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 69 | 55 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 65 | 62 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 63 | 54 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 21 | 21 | $0 |
Insurance plans in this area (ZIP 63367)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | MO | |
| - | MO | |
| G A S T R O E N T E R O L O G Y | NC | |
| General Surgery | MO | |
| Gastroenterology, Internal Medicine | MO | |
| G A S T R O E N T E R O L O G Y | MO | |
| - | MO | |
| Gastroenterology, Internal Medicine | MO | |
| G A S T R O E N T E R O L O G Y | MO | |
| Gastroenterology, Internal Medicine | MO |
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