Gustavo A. Fonseca, MD
NPI 1063478766ActiveIndividual· Internal Medicine, Medical Oncology· Lecanto, FL
Internal Medicine, Medical Oncology (MD) with Florida Cancer Specialists and Research Institute, LLC, practicing in Lecanto, Florida. Their prescriptions cost Medicare Part D more than their services did: $6,781,622 for 1,261 claims, against $4,352,102 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 40 companies reporting payments in 2025, $21,191 in all, mostly consulting fees.
Overview
| NPI | 1063478766 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 22, 2006 |
| Last updated in NPPES | Feb 19, 2026 |
| Certified by provider | Feb 19, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | ME57124 | FL |
| Internal Medicine, Hematology | 207RH0000X | ME57124 | FL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 989 |
|---|---|
| Services billed | 277,582 across 161 procedure codes |
| Paid by Medicare | $4,352,102 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,261 · 1,735 30-day fills |
|---|---|
| Patients | 266 |
| Total drug cost | $6,781,622 |
| Generic share | 61% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Hematology/Oncology |
Medical group
- Florida Cancer Specialists and Research Institute, LLCNorth Port, FL · 498 clinicians
Industry payments (Open Payments)
- 2025$21,191 · 102 payments from 40 companies
- 2024$21,517 · 151 payments from 41 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $4,994 | 7 |
| E.R. Squibb & Sons, L.L.C. | $4,721 | 2 |
| Astrazeneca Pharmaceuticals LP | $3,862 | 7 |
| Janssen Biotech, Inc. | $2,913 | 3 |
| Janssen Global Services, LLC | $1,980 | 1 |
What the 2025 payments were for
- Consulting Fee$17,826 · 7 payments
- Food and Beverage$2,947 · 94 payments
- Travel and Lodging$417.38 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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