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

Garret G. De Castro, MD

Individual provider Internal Medicine Physician · NPI 1427273895

Garret G. De Castro, MD is an Internal Medicine Physician in Renton, Washington. Works from 2 locations. Licensed in Washington.

Licensed in
WA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

606 Oakesdale Ave SW Ste C200
Renton, WA 98057
Phone: (866) 259-1629
Fax: (855) 666-8541
Show map & directions

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) 316-5130

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD00047669 (WA)

Record details

NPI number1427273895
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 13, 2007
Last updated in NPPESMay 31, 2018

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