ESTHER KOO D.O.
NPI 1982019824
Family Medicine in Bellevue, WA
About Esther Koo D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ESTHER KOO D.O. (NPI 1982019824) is an individual family medicine provider in Bellevue, Washington, licensed in Washington (OP60742178) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS.
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 (PECOS)
Esther Koo D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Esther Koo 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 98006 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.
BELLEVUE, WA 98006
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 Esther Koo's NPI number?
The NPI number for Esther Koo is 1982019824. It was assigned to this individual provider in the NPPES registry on June 30, 2014.
Where is Esther Koo located?
Esther Koo practices at 13451 SE 36th St, Bellevue, WA 98006. The listed phone number is (425) 562-1337.
What is Esther Koo's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Esther Koo enrolled in Medicare?
Yes. Esther Koo is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Esther Koo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Esther Koo 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 Esther Koo'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 Esther Koo was last updated on April 26, 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.