DR. MICHAEL JOHN ZYLSTRA MD
NPI 1437679636
Emergency Medicine in Seattle, WA
About Dr. Michael John Zylstra Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL JOHN ZYLSTRA MD (NPI 1437679636) is an individual emergency medicine provider in Seattle, Washington, licensed in Washington (MD61531935) and active in the NPI registry since June 2017. He is enrolled in Medicare PECOS, is affiliated with Highline Medical Center, and maintains a secondary practice location in Tacoma.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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 John Zylstra 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
6Medicare enrollment records show Michael Zylstra reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 4,364 clinicians in this Medicare group
Burien, WA 98166
- Reassigned Medicare billing, Washington enrollment
- 30 clinicians in this Medicare group
Hoodsport, WA 98548
- Reassigned Medicare billing, Washington enrollment
- Also billed through NPI 1760568752 (Washington)
- 154 clinicians in this Medicare group
Moses Lake, WA 98837
- Reassigned Medicare billing, Washington enrollment
- 158 clinicians in this Medicare group
Montour Falls, NY 14865
- Reassigned Medicare billing, New York enrollment
- 112 clinicians in this Medicare group
Ithaca, NY 14850
- Reassigned Medicare billing, New York enrollment
- 59 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Highline Medical Center
Acute Care Hospitals · Burien, WASamaritan Hospital
Acute Care Hospitals · Moses Lake, WAMason General Hospital & Family Of Clinics
Critical Access Hospitals · Shelton, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98104 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.
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 Zylstra's NPI number?
The NPI number for Michael Zylstra is 1437679636. It was assigned to this individual provider in the NPPES registry on June 20, 2017.
Where is Michael Zylstra located?
Michael Zylstra practices at 325 9th Ave, Seattle, WA 98104. The listed phone number is (206) 520-5000.
What is Michael Zylstra's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Michael Zylstra enrolled in Medicare?
Yes. Michael Zylstra 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 Michael Zylstra's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Zylstra reassigns Medicare benefits to 6 organizations: The Association Of University Physicians (Seattle, WA), Highline Emergency Physicians PLLC (Burien, WA), Public Hospital District No 1 Of Mason County (Hoodsport, WA), Grant County Public Hospital District 1 (Moses Lake, WA), Schuyler Hospital Inc (Montour Falls, NY) and 1 more organization, listed in the Medicare section above. 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 Michael Zylstra's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Zylstra accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Michael Zylstra 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 Zylstra affiliated with any hospitals?
According to CMS data, Michael Zylstra is affiliated with Highline Medical Center, Samaritan Hospital and Mason General Hospital & Family Of Clinics.
When was this NPI record last updated?
The NPPES record for Michael Zylstra was last updated on September 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Michael John Zylstra, MD · NPI 1437679636
Emergency Medicine physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since June 20, 2017.
## Identity
- **NPI:** 1437679636 (Entity type: Individual)
- **Enumerated:** June 20, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** MD61531935 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 325 9TH AVE, Seattle, WA 98104-2420
- **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:** 6 organizations under Medicare reassignment (form CMS-855R): The Association Of University Physicians (NPI 1023041159, Seattle, WA); Highline Emergency Physicians PLLC (NPI 1669757290, Burien, WA); Public Hospital District No 1 Of Mason County (NPI 1548699408, Hoodsport, WA); Grant County Public Hospital District 1 (NPI 1609112739, Moses Lake, WA); Schuyler Hospital Inc (NPI 1760582142, Montour Falls, NY); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rutgers New Jersey Medical School, class of 2017
## Record status
- **NPPES last updated:** September 18, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1437679636) · Data from the CMS NPPES public registry.