DR. WILLIAM JOSEPH JAWIEN MD
NPI 1417904020
Internal Medicine - Hematology & Oncology in Fresno, CA
About Dr. William Joseph Jawien Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM JOSEPH JAWIEN MD (NPI 1417904020) is an individual hematology & oncology provider in Fresno, California, licensed in California (G74904) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fresno, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1991).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. William Joseph Jawien Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show William Jawien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fresno, CA 93720
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 69
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 93720 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 5
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FRESNO, CA 93720
FRESNO, CA 93720
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Jawien's NPI number?
The NPI number for William Jawien is 1417904020. It was assigned to this individual provider in the NPPES registry on May 28, 2006.
Where is William Jawien located?
William Jawien practices at 7130 N Millbrook Ave, Fresno, CA 93720. The listed phone number is (559) 326-1222.
What is William Jawien's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is William Jawien enrolled in Medicare?
Yes. William Jawien is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for William Jawien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Jawien reassigns Medicare benefits to California Cancer Associates For Research And Excellence Inc (Fresno, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Jawien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for William Jawien was last updated on October 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.