Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Alex McFadden, MD

Individual provider Family Medicine Physician · NPI 1366478448

Dr. William Alex McFadden, MD is registered under Family Practice in Seattle, Washington. Graduated from University of Texas Medical School at Houston in 1995, 31 years ago. Practices with Swedish Health Services, a 384-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Washington.

Years since qualifying
31
Trained at
University of Texas Medical School at Houston
Licensed in
WA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

510 Boren Ave N
Seattle, WA 98109-5501
Phone: (206) 320-5200
Fax: (206) 320-5202
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 12800 Bothell Everett Hwy, Everett, WA 98208-6642 — (425) 316-5150

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD00038337 (WA)

Record details

NPI number1366478448
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 23, 2006
Last updated in NPPESOctober 28, 2022
Certification dateOctober 28, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT HOUSTON
Graduated 1995 (31 years in practice)
Group practice Swedish Health Services — 384 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients41
Services billed 176 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Swedish Health Services

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 384 clinicians in the practice; 12 are shown here.

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