William Joseph Jawien, MD
NPI 1417904020ActiveIndividual· Internal Medicine, Hematology & Oncology· Fresno, CA
Internal Medicine, Hematology & Oncology (MD) in Fresno, California, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1991). In 2024 Medicare paid $3,768,790 for 870 patients, and Part D covered 1,728 of their prescriptions, 71% of them generic. Astrazeneca Pharmaceuticals LP was the largest of 28 companies reporting payments in 2025, $1,673 in all, mostly food and beverage.
Overview
| NPI | 1417904020 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 28, 2006 |
| Last updated in NPPES | Oct 9, 2025 |
| Certified by provider | Oct 9, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | G74904 | 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 - Medical Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 870 |
|---|---|
| Services billed | 287,870 across 199 procedure codes |
| Paid by Medicare | $3,768,790 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,728 · 2,221 30-day fills |
|---|---|
| Patients | 228 |
| Total drug cost | $4,387,868 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- California Cancer Associates for Research and Excellence IncSan Diego, CA · 65 clinicians
Hospital affiliations
- Adventist Health HanfordHanford, CA
- Clovis Community Medical CenterClovis, CA
- Saint Agnes Medical CenterFresno, CA
Industry payments (Open Payments)
- 2025$1,673 · 83 payments from 28 companies
- 2024$2,328 · 121 payments from 29 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $267.48 | 18 |
| Daiichi Sankyo Inc. | $138.08 | 10 |
| Abbvie Inc. | $134.59 | 6 |
| Novartis Pharmaceuticals Corporation | $125.57 | 5 |
| Springworks Therapeutics, Inc. | $115.70 | 4 |
What the 2025 payments were for
- Food and Beverage$1,673 · 83 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 37 hematologist-oncologists in Fresno · All hematologist-oncologists in California