PHILIP J MEASE MD
NPI 1336218171
Internal Medicine - Rheumatology in Seattle, WA
About Philip J Mease Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PHILIP J MEASE MD (NPI 1336218171) is an individual rheumatology provider in Seattle, Washington, licensed in Washington (MD00016710) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center, and is a graduate of Stanford University School Of Medicine (1977).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 6
Accepted Insurance
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
Philip J Mease 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 Philip Mease reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 8 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 3
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Swedish Medical Center
Acute Care Hospitals · Seattle, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98104 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Philip Mease's NPI number?
The NPI number for Philip Mease is 1336218171. It was assigned to this individual provider in the NPPES registry on November 7, 2006.
Where is Philip Mease located?
Philip Mease practices at 1101 Madison St Ste 1000, Seattle, WA 98104. The listed phone number is (206) 386-2001.
What is Philip Mease's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Philip Mease enrolled in Medicare?
Yes. Philip Mease 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 Philip Mease's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Philip Mease reassigns Medicare benefits to Seattle Rheumatology Associates PLLC (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 Philip Mease's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Philip Mease accept?
Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Philip Mease 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.
Is Philip Mease affiliated with any hospitals?
According to CMS data, Philip Mease is affiliated with Swedish Medical Center.
When was this NPI record last updated?
The NPPES record for Philip Mease was last updated on April 1, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Philip J Mease, MD · NPI 1336218171
Rheumatology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since November 7, 2006.
## Identity
- **NPI:** 1336218171 (Entity type: Individual)
- **Enumerated:** November 7, 2006
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** MD00016710 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1101 MADISON ST STE 1000, Seattle, WA 98104-3556
- **Phone:** (206) 386-2001 · **Fax:** (206) 386-2083
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Seattle Rheumatology Associates PLLC (NPI 1346306453, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Stanford University School Of Medicine, class of 1977
## Record status
- **NPPES last updated:** April 1, 2008
- **Other identifiers:** Other 4026ME (WA); Other 0150617 (WA); Medicaid 7107899 (WA); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1336218171) · Data from the CMS NPPES public registry.