Shawn L. Slack, MD
Rheumatology Physician · Everett, WA
Shawn L. Slack, MD is a rheumatology physician with a practice address in Everett, Washington, and NPI 1306853239, issued on Aug 2, 2006. Check the license (Washington MD00032937, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Shawn L. Slack
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- MD00032937 WA
Self-reported in NPPES; status is on the state search - Practice location
- 3901 Hoyt Ave, Everett, WA 98201
- Phone
- (425) 259-0966
- Enumerated
- Aug 2, 2006
- Record last updated
- May 14, 2026
- Medicare enrollment
- Enrolled (PECOS I20100903000874); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 200 in Washington → Look up another NPI →
Also registered at 3901 Hoyt Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rachel Allen, D.O.Neurology Physician1982866158
- Ahmed AlshabanHematology & Oncology Physician1720442650
- Samuel Armstrong, MDInternal Medicine Physician1548325988
Verify Shawn L. Slack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00032937Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% more Medicare Part D claims than the average rheumatology physician in 2024
2,392 Medicare Part D claims for 345 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 12 claims were for opioids.
Most prescribed
- Prednisone515 claims
- Hydroxychloroquine Sulfate406 claims
- Methotrexate286 claims
- Folic Acid105 claims
- Alendronate Sodium98 claims
- Allopurinol75 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Optum Care Washington PLLCBellevue, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Shawn L. Slack among 200 rheumatology physician records in Washington
Shawn L. Slack, MD is one of 200 rheumatology physician records with a practice address in Washington. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 52% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1992 · median 2005 among the 123 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Washington
There are 200 rheumatology physician records in Washington.
All 200 in Washington → Every provider in Everett → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Cathy Fritchen, MDEverett, WA 982011043315534
- Shaila Gala, MDEverett, WA 982011447355813
- Thuc Nguyen, MDEverett, WA 982011902901309
- Sameet Sangha, M.D.Everett, WA 982011669812442
- Karin Schmitt, MDEverett, WA 982011972520872
- Louie Tsiktsiris, MDEverett, WA 982011720086168
- Jonathan Witte, MDEverett, WA 982011386740355
- Andrew Sohn, MDEverett, WA 982031215977897
Common questions
What is Shawn L. Slack, MD's NPI number?
Shawn L. Slack, MD's National Provider Identifier (NPI) is 1306853239, issued on Aug 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Shawn L. Slack, MD located?
The NPPES record lists a practice address at 3901 Hoyt Ave, Everett, WA, 98201. Phone: (425) 259-0966. Providers update this record themselves, so call before visiting.
How can I verify Shawn L. Slack, MD's license?
NPPES lists Washington license number MD00032937, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Shawn L. Slack, MD prescribe under Medicare Part D?
In 2024, Shawn L. Slack, MD had 2,392 Medicare Part D claims for 345 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.