Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Michael L. Tjoelker, M.D.

Dermatology Physician in Everett, WA · enumerated 2007 · authorized official Michael Tjoelker, Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1649454026

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Registry record

Entity type Organization (Type 2)

Legal business name Michael L. Tjoelker, M.D.

Practice address 3327 Colby Ave, Everett, WA, 98201

Phone (425) 259-0049

Fax (425) 258-6403

Enumeration date Dec 20, 2007

Last updated in NPPES Dec 20, 2007

Taxonomy & classification

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License MD00022643 (WA) Primary

Authorized official

Name Michael Tjoelker

Title Owner

Phone (425) 259-0049

Other identifiers

Identifier	Type	State	Issuer
1000892	Medicaid	WA	—

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Michael L. Tjoelker, M.D. located?

The practice location on file with NPPES is in Everett, WA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-12-20. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Mark Valentine Dermatology Physician · Everett, WA NPI 1043294473 Edin Denison Clinical Social Worker · Everett, WA NPI 1578015145 Meadows Agency LLC Edin Dail Denison Mbr Clinical Social Worker · Everett, WA NPI 1700666948

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-20.