DR. MICHAEL THOMSON BIALOS MD
NPI 1245212703
Anesthesiology in Seattle, WA
About Dr. Michael Thomson Bialos Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL THOMSON BIALOS MD (NPI 1245212703) is an individual anesthesiology provider in Seattle, Washington, licensed in Washington (MD.MD.60542279) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with University Of Washington Medical Ctr, and maintains a secondary practice location in Seattle.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Dr. Michael Thomson Bialos 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 Reassignment
Medicare enrollment records show Michael Bialos reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 4,364 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.
University Of Washington Medical Ctr
Acute Care Hospitals · Seattle, WAMedicare 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.
SEATTLE, WA 98133
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 Michael Bialos's NPI number?
The NPI number for Michael Bialos is 1245212703. It was assigned to this individual provider in the NPPES registry on November 18, 2005.
Where is Michael Bialos located?
Michael Bialos practices at 1550 N 115th St, Seattle, WA 98133. The listed phone number is (206) 520-5000.
What is Michael Bialos's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Michael Bialos enrolled in Medicare?
Yes. Michael Bialos 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 organization bills Medicare for Michael Bialos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Bialos reassigns Medicare benefits to The Association Of University Physicians (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 Michael Bialos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Bialos accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Michael Bialos 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 Michael Bialos affiliated with any hospitals?
According to CMS data, Michael Bialos is affiliated with University Of Washington Medical Ctr.
When was this NPI record last updated?
The NPPES record for Michael Bialos was last updated on October 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days 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. Michael Thomson Bialos, MD · NPI 1245212703
Anesthesiology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since November 18, 2005.
## Identity
- **NPI:** 1245212703 (Entity type: Individual)
- **Enumerated:** November 18, 2005
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** MD.MD.60542279 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1550 N 115TH ST, Seattle, WA 98133-8401
- **Phone:** (206) 520-5000
## 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:** The Association Of University Physicians (NPI 1023041159, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 2001
## Record status
- **NPPES last updated:** October 8, 2026
- **Other identifiers:** Medicaid 1245212703 (WA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1245212703) · Data from the CMS NPPES public registry.