NORTHWEST ASTHMA & ALLERGY CENTER
NPI 1659446938
Allergy & Immunology in Yakima, WA
About Northwest Asthma & Allergy Center NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NORTHWEST ASTHMA & ALLERGY CENTER (NPI 1659446938) is a healthcare organization registered as an allergy & immunology in Yakima, Washington and active in the NPI registry since November 2006. The organization holds a CLIA Microscopy certificate valid through April 4, 2028 and lists Patricia S Mathias, Credentialing Coordinator, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Northwest Asthma & Allergy Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
19Medicare enrollment records show 19 clinicians reassign Medicare billing to Northwest Asthma & Allergy Center, which bills Medicare for the services they deliver. Of these, 1 practice at this address. They are listed nearest first.
Clinicians by Medicare Specialty 2
Clinicians, nearest first (19)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate for Provider-Performed Microscopy Procedures (PPMP) 50D0631902
Northwest Asthma And Allergy Center · Seattle, WAFrequently 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 Northwest Asthma & Allergy Center's NPI number?
The NPI number for Northwest Asthma & Allergy Center is 1659446938. It was assigned to this organization in the NPPES registry on November 21, 2006.
Where is Northwest Asthma & Allergy Center located?
Northwest Asthma & Allergy Center is located at 3901 Creekside Loop Suite 100, Yakima, WA 98902. The listed phone number is (509) 966-3259.
What is Northwest Asthma & Allergy Center's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Northwest Asthma & Allergy Center enrolled in Medicare?
Yes. Northwest Asthma & Allergy Center is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Northwest Asthma & Allergy Center?
According to the CMS Revalidation Reassignment List (October 2026 release), 19 clinicians in 2 Medicare specialties reassign their Medicare billing to Northwest Asthma & Allergy Center. 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 Allergy/Immunology (17) and Nurse Practitioner (2). Of these, 1 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Northwest Asthma & Allergy Center hold a CLIA laboratory certificate?
Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 50D0631902) is associated with this NPI, valid through April 4, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Northwest Asthma & Allergy Center was last updated on January 18, 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.
# Northwest Asthma & Allergy Center · NPI 1659446938
Allergy & Immunology organization in Yakima, Washington. Organization record, active in the CMS NPPES registry since November 21, 2006.
## Identity
- **NPI:** 1659446938 (Entity type: Organization)
- **Enumerated:** November 21, 2006
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **Organization subpart:** Yes (part of Northwest Asthma & Allergy Center)
- **Authorized official:** Patricia Mathias, CREDENTIALING COORDINATOR
## Practice location
- **Address:** 3901 CREEKSIDE LOOP, SUITE 100, Yakima, WA 98902-4801
- **Phone:** (509) 966-3259 · **Fax:** (509) 966-0191
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 19 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Allergy/Immunology (17), Nurse Practitioner (2); 1 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 18, 2008
- **Other identifiers:** Medicaid 7701808 (WA); Medicare NSC 0436890008 (WA); Other C19081 (WA)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1659446938) · Data from the CMS NPPES public registry.