Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Shawn L Slack, MD

Individual provider Rheumatology Physician · NPI 1306853239

Shawn L Slack, MD practises Rheumatology in Everett, Washington. Graduated from University of Washington School of Medicine in 1992, 34 years ago. Practices with Optum Care Washington PLLC, a 685-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Washington.

Years since qualifying
34
Trained at
University of Washington School of Medicine
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

3901 Hoyt Ave
Everett, WA 98201-4918
Phone: (425) 259-0966
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence MD00032937 (WA)

Record details

NPI number1306853239
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 2, 2006
Last updated in NPPESMay 14, 2026
Certification dateMay 14, 2026

Medicare enrollment

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

Medicare specialtyRHEUMATOLOGY
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Optum Care Washington Pllc — 685 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations6 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 patients328
Services billed 3,511 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Colleagues at Optum Care Washington PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 685 clinicians in the practice; 12 are shown here.

Other providers in Everett