MATRIX ANESTHESIA, PS
NPI 1831146422
Anesthesiology in Bellevue, WA
About Matrix Anesthesia, Ps NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MATRIX ANESTHESIA, PS (NPI 1831146422), doing business as Overlake Anesthesiologists, Ps, is a healthcare organization registered as an anesthesiology in Bellevue, Washington and active in the NPI registry since May 2006. The organization lists Andrew Strigenz, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Matrix Anesthesia, Ps is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
93Medicare enrollment records show 93 clinicians reassign Medicare billing to Matrix Anesthesia, Ps, which bills Medicare for the services they deliver. Of these, 24 practice at this address and 85 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 2
Nearest to this location (20)
See all 93Bellevue, WA 98004
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Matrix Anesthesia, Ps's NPI number?
The NPI number for Matrix Anesthesia, Ps is 1831146422. It was assigned to this organization in the NPPES registry on May 28, 2006. The provider was formerly known as Overlake Anesthesiologists, Ps.
Where is Matrix Anesthesia, Ps located?
Matrix Anesthesia, Ps is located at 1035 116th Ave NE, Bellevue, WA 98004. The listed phone number is (425) 451-4141.
What is Matrix Anesthesia, Ps's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Matrix Anesthesia, Ps enrolled in Medicare?
Yes. Matrix Anesthesia, Ps is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Matrix Anesthesia, Ps?
According to the CMS Revalidation Reassignment List (October 2026 release), 93 clinicians in 2 Medicare specialties reassign their Medicare billing to Matrix Anesthesia, Ps. 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 Anesthesiology (92) and Critical Care (Intensivists) (1). Of these, 24 practice at this address and 85 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Matrix Anesthesia, Ps accept?
Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Matrix Anesthesia, Ps 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.
When was this NPI record last updated?
The NPPES record for Matrix Anesthesia, Ps was last updated on December 29, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Matrix Anesthesia, Ps · NPI 1831146422
Anesthesiology organization in Bellevue, Washington. Organization record, active in the CMS NPPES registry since May 28, 2006.
## Identity
- **NPI:** 1831146422 (Entity type: Organization)
- **Enumerated:** May 28, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **Organization subpart:** No
- **Authorized official:** Andrew Strigenz, PRESIDENT
## Practice location
- **Address:** 1035 116TH AVE NE, Bellevue, WA 98004-4604
- **Phone:** (425) 451-4141 · **Fax:** (425) 451-4144
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 93 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Anesthesiology (92), Critical Care (Intensivists) (1); 24 practice at this address and 85 within 10 miles; [full list](https://npiprofile.com/npi/1831146422/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 29, 2008
- **Other identifiers:** Medicaid 7822000 (WA); Medicare PIN G000155300 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1831146422) · Data from the CMS NPPES public registry.