DR. ALEX YUSHAUN KOO MD
NPI 1740671148
Emergency Medicine in Tacoma, WA
About Dr. Alex Yushaun Koo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEX YUSHAUN KOO MD (NPI 1740671148) is an individual emergency medicine provider in Tacoma, Washington, licensed in Washington (MD60859647) and active in the NPI registry since February 2015. He is enrolled in Medicare PECOS, is affiliated with Medstar Saint Mary's Hospital, and maintains a secondary practice location in Joint Base Lewis Mcchord.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Dr. Alex Yushaun Koo 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 Alex Koo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Also billed through NPI 1376887844 (Maryland)
- 3,530 clinicians in this Medicare group
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Medicare enrollment name: Whc Physician Group LLC
- Also billed through NPI 1700154226 (Maryland)
- 613 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.
Medstar Saint Mary's Hospital
Acute Care Hospitals · Leonardtown, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98431 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
TACOMA, WA 98431
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 Alex Koo's NPI number?
The NPI number for Alex Koo is 1740671148. It was assigned to this individual provider in the NPPES registry on February 7, 2015.
Where is Alex Koo located?
Alex Koo practices at 9040 Jackson Ave, Tacoma, WA 98431. The listed phone number is (253) 968-1110.
What is Alex Koo's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Alex Koo enrolled in Medicare?
Yes. Alex Koo 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 Alex Koo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alex Koo reassigns Medicare benefits to 2 organizations: Medstar Medical Group II LLC (Washington, DC) and Whc Emerg Phys (Washington, DC). 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 Alex Koo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Alex Koo affiliated with any hospitals?
According to CMS data, Alex Koo is affiliated with Medstar Saint Mary's Hospital.
When was this NPI record last updated?
The NPPES record for Alex Koo was last updated on May 16, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Dr. Alex Yushaun Koo, MD · NPI 1740671148
Emergency Medicine physician in Tacoma, Washington. Individual provider, active in the CMS NPPES registry since February 7, 2015.
## Identity
- **NPI:** 1740671148 (Entity type: Individual)
- **Enumerated:** February 7, 2015
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** MD60859647 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 9040 JACKSON AVE, Tacoma, WA 98431-1000
- **Phone:** (253) 968-1110
## 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): Medstar Medical Group II LLC (NPI 1205562816, Washington, DC); Whc Emerg Phys (NPI 1306260625, Washington, DC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** May 16, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1740671148) · Data from the CMS NPPES public registry.