FRANK S SAMMARCO (M.D.) – Gastroenterology Physician, NPI 1407953920
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
401 GASTROENTEROLOGY in CT
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Provider Addresses for FRANK S SAMMARCO (M.D.)
761, Main Avenue, Norwalk, Fairfield County, Connecticut, 06851, United States
SUITE 201
NORWALK, CT 068511080
Phone: (203) 838-4000
Fax: (203) 845-9535
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 36 Open Payments records for all available years, with a total value of $728.
Total Amount is formed as General ($728) + Research ($0) + Ownership ($0) = $728.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Janssen Biotech, Inc. ($267).
Total Amount
$728
General + Research + Ownership
Payments
36
Total payment records
General Amount
$728
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $267 |
| Takeda Pharmaceuticals U.S.A., Inc. | $192 |
| Ardelyx, Inc. | $174 |
| Halozyme Inc | $31 |
| ABBVIE INC. | $28 |
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: 2010-01-19
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 |
|---|---|---|---|---|
| I20100119000401 | I | Gastroenterology | CT | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 214 | 186 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 159 | 156 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 129 | 127 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 115 | 115 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 61 | 61 | $0 |
Insurance plans in this area (ZIP 06851)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CT | |
| Nurse Practitioner | CT | |
| Nurse Practitioner | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| Internal Medicine | CT | |
| Internal Medicine | CT | |
| Nurse Practitioner | CT | |
| Cardiac Electrophysiology, Cardiovascular Disease (Cardiology) | CT |
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