Ariel Marton Fischer, MD
NPI 1518594027ActiveIndividual· Internal Medicine, Gastroenterology· Santa Rosa, CA
Internal Medicine, Gastroenterology (MD) in Santa Rosa, California, trained at Tufts University School of Medicine (class of 2020). Part D covered 74 prescriptions written in 2024, 70% of them generic. Madrigal Pharmaceuticals was the largest of 4 companies reporting payments in 2025, $726.15 in all, mostly food and beverage.
Overview
| NPI | 1518594027 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 25, 2020 |
| Last updated in NPPES | Sep 16, 2026 |
| Certified by provider | Sep 16, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A207222 | 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 - Gastroenterology (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 74 · 163 30-day fills |
|---|---|
| Patients | 20 |
| Total drug cost | $60,131 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Gastroenterology |
Industry payments (Open Payments)
- 2025$726.15 · 19 payments from 4 companies
- 2024$207.61 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $306.71 | 4 |
| Mallinckrodt Hospital Products Inc. | $196.96 | 11 |
| Gilead Sciences, Inc. | $143.95 | 2 |
| Boston Scientific Corporation | $78.53 | 2 |
What the 2025 payments were for
- Food and Beverage$726.15 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Santa Rosa
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All 22 gastroenterologists in Santa Rosa · All gastroenterologists in California