Gregory Fontana, M.D.
NPI 1508840570ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· Thousand Oaks, CA
Thoracic Surgery (Cardiothoracic Vascular Surgery) (M.D.) in Thousand Oaks, California, trained at University of California, Geffen School of Medicine (class of 1984). Mostly services rather than prescriptions: Medicare paid $90,179 for 191 patients in 2024, with only 25 Part D claims. Medtronic, Inc. was the largest of 13 companies reporting payments in 2025, $133,084 in all, mostly consulting fees.
Overview
| NPI | 1508840570 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 2, 2005 |
| Last updated in NPPES | Feb 9, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | 263949 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Thoracic Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 191 |
|---|---|
| Services billed | 449 across 33 procedure codes |
| Paid by Medicare | $90,179 |
Part D prescriptions in 2024
| Prescriptions (claims) | 25 · 39 30-day fills |
|---|---|
| Patients | 11 |
| Total drug cost | $5,023 |
| Generic share | 64% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Thoracic Surgery |
| Secondary specialties | Cardiac Surgery |
Medical group
- Golden State Providers, A Medical CorporationThousand Oaks, CA · 23 clinicians
Hospital affiliation
- Los Robles Hospital & Medical CenterThousand Oaks, CA
Industry payments (Open Payments)
- 2025$133,084 · 182 payments from 13 companies
- 2024$123,489 · 220 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $78,146 | 127 |
| Abbott Laboratories | $51,354 | 36 |
| Edwards Lifesciences Corporation | $2,668 | 4 |
| Boston Scientific Corporation | $391.07 | 3 |
| Abiomed | $161.12 | 4 |
What the 2025 payments were for
- Consulting Fee$62,930 · 10 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$51,721 · 16 payments
- Travel and Lodging$11,563 · 17 payments
- Food and Beverage$6,809 · 138 payments
- Education$61.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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