SEATTLE RHEUMATOLOGY ASSOCIATES PLLC
NPI 1346306453
Internal Medicine - Rheumatology in Seattle, WA
About Seattle Rheumatology Associates Pllc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SEATTLE RHEUMATOLOGY ASSOCIATES PLLC (NPI 1346306453) is a healthcare organization registered as a rheumatology in Seattle, Washington and active in the NPI registry since December 2006. The organization lists Philip J Mease, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Seattle Rheumatology Associates Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
8Medicare enrollment records show 8 clinicians reassign Medicare billing to Seattle Rheumatology Associates PLLC, which bills Medicare for the services they deliver. Of these, 4 practice at this address and 6 within 10 miles. They are listed nearest first.
Clinicians, nearest first (8)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Seattle Rheumatology Associates PLLC's NPI number?
The NPI number for Seattle Rheumatology Associates PLLC is 1346306453. It was assigned to this organization in the NPPES registry on December 31, 2006.
Where is Seattle Rheumatology Associates PLLC located?
Seattle Rheumatology Associates PLLC is located at 1229 Madison St Ste 1450, Seattle, WA 98104. The listed phone number is (206) 844-6001.
What is Seattle Rheumatology Associates PLLC's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Seattle Rheumatology Associates PLLC enrolled in Medicare?
Yes. Seattle Rheumatology Associates PLLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Seattle Rheumatology Associates PLLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 8 clinicians in 4 Medicare specialties reassign their Medicare billing to Seattle Rheumatology Associates PLLC. A 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 the clinician's services. The largest specialties are Rheumatology (4), Nurse Practitioner (2) and Dermatology (1). Of these, 4 practice at this address and 6 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Seattle Rheumatology Associates PLLC accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Seattle Rheumatology Associates PLLC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Seattle Rheumatology Associates PLLC was last updated on December 16, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.
# Seattle Rheumatology Associates Pllc · NPI 1346306453
Rheumatology organization in Seattle, Washington. Organization record, active in the CMS NPPES registry since December 31, 2006.
## Identity
- **NPI:** 1346306453 (Entity type: Organization)
- **Enumerated:** December 31, 2006
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **Organization subpart:** No
- **Authorized official:** Philip Mease, OWNER
## Practice location
- **Address:** 1229 MADISON ST STE 1450, Seattle, WA 98104-3538
- **Phone:** (206) 844-6001 · **Fax:** (206) 844-6002
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 8 clinicians in 4 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Rheumatology (4), Nurse Practitioner (2), Dermatology (1); 4 practice at this address and 6 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 16, 2024
- **Other identifiers:** Medicaid 7107899 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1346306453) · Data from the CMS NPPES public registry.