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

Calvin Horace Knapp III, MD

Individual provider Dermatology Physician · NPI 1225533458

Calvin Horace Knapp III, MD is a Dermatology in Everett, Washington. Qualified in 2018, 8 years ago. Practices with Optum Care Washington PLLC, a 685-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
8
Licensed in
WA
In the registry since
2018
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

4004 Colby Ave
Everett, WA 98201-6203
Phone: (425) 339-5417
Fax: (425) 339-5429
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence MD61463521 (WA)

Record details

NPI number1225533458
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 29, 2018
Last updated in NPPESApril 17, 2026
Certification dateApril 17, 2026

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Optum Care Washington Pllc — 685 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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