DR. GILBERT SIMONI (M.D., FACG) – Gastroenterology Physician, NPI 1316922958
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,981 GASTROENTEROLOGY in CA
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Provider Addresses for DR. GILBERT SIMONI (M.D., FACG)
555, Marin Street, Thousand Oaks, Ventura County, California, 91360, United States
SUITE 270
THOUSAND OAKS, CA 913604236
Phone: (805) 719-0244
Fax: (805) 777-1730
Type: Mailing
Marin Street, Thousand Oaks, Ventura County, California, 91360, United States
THOUSAND OAKS, CA 913604112
Phone: (805) 719-0244
Fax: (805) 777-1730
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 150 Open Payments records for all available years, with a total value of $9,387.
Total Amount is formed as General ($9,387) + Research ($0) + Ownership ($0) = $9,387.
Last reported payment date: 2024-12-20 • Largest payer in this snapshot: ABBVIE INC. ($6,920).
Total Amount
$9,387
General + Research + Ownership
Payments
150
Total payment records
General Amount
$9,387
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-20
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: 2015-10-16
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20061120000297 | I | Gastroenterology | CA | TBD |
| I20151016001114 | I | Gastroenterology | SD | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 307 | 160 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 128 | 87 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 82 | 78 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 62 | 62 | $0 |
| 76700 | Complete ultrasound scan of abdomen | 56 | 53 | $0 |
Insurance plans in this area (ZIP 91360)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | CA | |
| Interventional Cardiology, Cardiovascular Disease (Cardiology) | CA | |
| - | FL | |
| Nurse Practitioner | VA | |
| U R O L O G Y | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| Nurse Practitioner | CA | |
| - | CA |
Reviews
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