MS. KATHARINE MCDONALD WON MD
NPI 1902337058
Family Medicine in Seattle, WA
About Ms. Katharine Mcdonald Won Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. KATHARINE MCDONALD WON MD (NPI 1902337058) is an individual family medicine provider in Seattle, Washington, licensed in Washington (MD60958278) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 3
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
Ms. Katharine Mcdonald Won 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 Reassignments
2Medicare enrollment records show Katharine Won reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98118
- Reassigned Medicare billing, Washington enrollment
- 292 clinicians in this Medicare group
Seattle, WA 98178
- Reassigned Medicare billing, Washington enrollment
- 403 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
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 98118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
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.
SEATTLE, WA 98118
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 Katharine Won's NPI number?
The NPI number for Katharine Won is 1902337058. It was assigned to this individual provider in the NPPES registry on March 21, 2017. The provider is also known as Ms. Katharine Elizabeth Mcdonald.
Where is Katharine Won located?
Katharine Won practices at 9245 Rainier Ave S, Seattle, WA 98118. The listed phone number is (206) 722-8444.
What is Katharine Won's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Katharine Won enrolled in Medicare?
Yes. Katharine Won 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 organizations bill Medicare for Katharine Won's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katharine Won reassigns Medicare benefits to 2 organizations: Neighborcare Health (Seattle, WA) and Healthpoint (Seattle, WA). Each 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 Katharine Won's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katharine Won accept?
Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Katharine Won 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 Katharine Won affiliated with any hospitals?
According to CMS data, Katharine Won is affiliated with Swedish Medical Center.
When was this NPI record last updated?
The NPPES record for Katharine Won was last updated on June 4, 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.
# Ms. Katharine Mcdonald Won, MD · NPI 1902337058
Family Medicine physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since March 21, 2017.
## Identity
- **NPI:** 1902337058 (Entity type: Individual)
- **Enumerated:** March 21, 2017
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** MD60958278 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 9245 RAINIER AVE S, Seattle, WA 98118-5569
- **Phone:** (206) 722-8444 · **Fax:** (206) 721-6310
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Neighborcare Health (NPI 1275567539, Seattle, WA); Healthpoint (NPI 1396254736, Seattle, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2017
## Record status
- **NPPES last updated:** June 4, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1902337058) · Data from the CMS NPPES public registry.