Quick answers
- Does William J. Jawien accept Medicare assignment?
- Yes. Medicare's clinician data says William J. Jawien accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does William J. Jawien see?
- In 2024, CMS data shows 870 Original Medicare patients and 287,870 services for William J. Jawien. This counts Original Medicare only and measures volume, not quality.
- What is William J. Jawien's NPI number?
- 1417904020. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for William J. Jawien, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 870 |
|---|---|
| Services billed to Medicare | 287,870 |
| Different services or procedures | 199 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881)65,700 services
- Injection, filgrastim-ayow, biosimilar, (releuko), 1 microgram (Q5125)37,920 services
- Injection, ferric carboxymaltose, 1 mg (J1439)33,000 services
- Injection, nivolumab, 1 mg (J9299)23,040 services
- Injection, testosterone cypionate, 1 mg (J1071)12,050 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Diabetes45%
- Chronic kidney disease44%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)38%
Hospitals where William J. Jawien works
Medicare's Facility Affiliation Data lists William J. Jawien at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Adventist Health HanfordHanford, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050121
- Clovis Community Medical CenterClovis, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050492
- Saint Agnes Medical CenterFresno, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050093
Practice locations
Addresses where William J. Jawien is enrolled with Medicare (CMS data updated October 2, 2026).
- 7130 N Millbrook AveFresno, CA 93720 (559) 326‑1222
Group practices
Medicare enrollment lists William J. Jawien as a member of this group (CMS data updated October 2, 2026).
- California Cancer Associates for Research and Excellence Inc65 clinicians in the group
Specialties
- Medical Oncologyprimary
- Internal Medicinealso
Other oncologists in Fresno
Clinicians with the same Medicare primary specialty in Fresno, CA — not a recommendation.
Other clinicians in California Cancer Associates for Research and Excellence Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1417904020 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians