Marissa Fox, MD
NPI 1356970883ActiveIndividual· Internal Medicine· Los Angeles, CA
Internal Medicine (MD) in Los Angeles, California, licensed in CA, with an NPI issued in April 2020. Part D covered 2,635 prescriptions written in 2024, 71% of them generic. Gilead Sciences, Inc. was the largest of 10 companies reporting payments in 2025, $1,720 in all, mostly food and beverage.
Overview
| NPI | 1356970883 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 6, 2020 |
| Last updated in NPPES | Feb 25, 2024 |
| Certified by provider | Feb 25, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A178987 | CA |
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 - Internal Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 2,635 · 3,530 30-day fills |
|---|---|
| Patients | 219 |
| Total drug cost | $2,117,494 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 2020 |
|---|---|
| Medicare specialty | Internal Medicine |
Industry payments (Open Payments)
- 2025$1,720 · 64 payments from 10 companies
- 2024$2,517 · 100 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $768.51 | 26 |
| Viiv Healthcare Company | $483.78 | 20 |
| Merck Sharp & Dohme LLC | $148.36 | 5 |
| Abbvie Inc. | $123.15 | 4 |
| Napo Pharmaceuticals Inc | $102.64 | 4 |
What the 2025 payments were for
- Food and Beverage$1,720 · 64 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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