BRENDA ARZILLO S.W.
NPI 1861544504
Social Worker - Clinical in Seattle, WA
About Brenda Arzillo S.w. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRENDA ARZILLO S.W. (NPI 1861544504) is an individual clinical provider in Seattle, Washington, licensed in Washington (LW00007234) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS and is a graduate of Other (1988).
NPPES Registry Identity
Specialties & Licenses
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
Brenda Arzillo S.w. 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 Brenda Arzillo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98109
- Reassigned Medicare billing, Washington enrollment
- 2,678 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98101 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SEATTLE, WA 98101
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 Brenda Arzillo's NPI number?
The NPI number for Brenda Arzillo is 1861544504. It was assigned to this individual provider in the NPPES registry on January 16, 2007.
Where is Brenda Arzillo located?
Brenda Arzillo practices at 1730 Minor Ave, Seattle, WA 98101. The listed phone number is (206) 287-2500.
What is Brenda Arzillo's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Brenda Arzillo enrolled in Medicare?
Yes. Brenda Arzillo 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 Brenda Arzillo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brenda Arzillo reassigns Medicare benefits to Kaiser Foundation Health Plan Of Washington (Seattle, WA). 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 Brenda Arzillo'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 Brenda Arzillo was last updated on March 31, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.
# Brenda Arzillo, S.W. · NPI 1861544504
Clinical provider in Seattle, Washington. Individual provider, active in the CMS NPPES registry since January 16, 2007.
## Identity
- **NPI:** 1861544504 (Entity type: Individual)
- **Enumerated:** January 16, 2007
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** LW00007234 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1730 MINOR AVE, Seattle, WA 98101-1498
- **Phone:** (206) 287-2500 · **Fax:** (206) 287-2626
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Kaiser Foundation Health Plan Of Washington (NPI 1396810701, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1988
## Record status
- **NPPES last updated:** March 31, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1861544504) · Data from the CMS NPPES public registry.