William Richard Raffo, M.D.
NPI 1659356137ActiveIndividual· Internal Medicine, Nephrology· Santa Cruz, CA
Internal Medicine, Nephrology (M.D.) in Santa Cruz, California, trained at Creighton University School of Medicine (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $339,700 for 1,167 claims, against $203,927 paid for services in 2024. Calliditas Therapeutics US Inc. was the largest of 3 companies reporting payments in 2025, $314.39 in all, mostly food and beverage.
Overview
| NPI | 1659356137 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 7, 2005 |
| Last updated in NPPES | Dec 2, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A80608 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 369 |
|---|---|
| Services billed | 2,563 across 24 procedure codes |
| Paid by Medicare | $203,927 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,167 · 2,732 30-day fills |
|---|---|
| Patients | 207 |
| Total drug cost | $339,700 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Creighton University School of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Hospital affiliation
- Dominican HospitalSanta Cruz, CA
Other facilities
- Shc CapitolaDialysis facility · Capitola, CA
- Shc WatsonvilleDialysis facility · Watsonville, CA
Industry payments (Open Payments)
- 2025$314.39 · 4 payments from 3 companies
- 2024$11,772 · 24 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calliditas Therapeutics US Inc. | $124.98 | 1 |
| Travere Therapeutics, Inc. | $124.94 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $64.47 | 2 |
What the 2025 payments were for
- Food and Beverage$314.39 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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