Rafael Fonseca, M.D.
NPI 1275517898ActiveIndividual· Internal Medicine, Hematology· Scottsdale, AZ
Internal Medicine, Hematology (M.D.) with Mayo Clinic Arizona, practicing in Scottsdale, Arizona. Their prescriptions cost Medicare Part D more than their services did: $3,913,946 for 772 claims, against $25,727 paid for services in 2024. Regeneron Pharmaceuticals, Inc. was the largest of 10 companies reporting payments in 2025, $75,924 in all, mostly consulting fees. Lists Mayo Clinic Hospital as a hospital affiliation.
Overview
| NPI | 1275517898 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 6, 2005 |
| Last updated in NPPES | Sep 3, 2020 |
| Certified by provider | Sep 3, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology Primary | 207RH0000X | 32565 | AZ |
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 - Hematology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 145 |
|---|---|
| Services billed | 298 across 9 procedure codes |
| Paid by Medicare | $25,727 |
Part D prescriptions in 2024
| Prescriptions (claims) | 772 · 1,033 30-day fills |
|---|---|
| Patients | 86 |
| Total drug cost | $3,913,946 |
| Generic share | 66% of claims |
Education and affiliations
| Graduation year | 1991 |
|---|---|
| Medicare specialty | Hematology |
| Telehealth | Offers telehealth |
Medical group
- Mayo Clinic ArizonaScottsdale, AZ · 1,626 clinicians
Hospital affiliation
- Mayo Clinic HospitalPhoenix, AZ
Industry payments (Open Payments)
- 2025$75,924 · 34 payments from 10 companies
- 2024$69,113 · 41 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Pharmaceuticals, Inc. | $27,861 | 10 |
| E.R. Squibb & Sons, L.L.C. | $20,118 | 4 |
| Janssen Global Services, LLC | $13,353 | 8 |
| Janssen Research & Development, LLC | $4,050 | 1 |
| Adaptive Biotechnologies Corporation | $4,035 | 3 |
What the 2025 payments were for
- Consulting Fee$62,679 · 21 payments
- Travel and Lodging$12,488 · 4 payments
- Honoraria$407.50 · 1 payment
- Food and Beverage$350.32 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Hematology providers in Scottsdale
- 1497143895
- 1033341672
- 1972781581
- 1992789671