Garret De Castro, MD
NPI 1427273895 · Internal Medicine Physician · Renton, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Garret De Castro, MD is a Internal Medicine Physician provider in Renton, WA (NPI 1427273895).
Provider details
- NPI number
- 1427273895
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00047669 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 12800 Bothell Everett HwySuite 180Everett, WA 98208-6642Phone: (425) 316-5130
Registry dates
- Enumerated
- 2007-04-13
- Last updated
- 2018-05-31
Frequently asked questions
- What is Garret De Castro's NPI number?
- Garret De Castro's National Provider Identifier (NPI) is 1427273895, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Garret De Castro's specialty?
- Garret De Castro is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Garret De Castro located?
- Garret De Castro's practice location on file with NPPES is 606 Oakesdale Ave Sw Ste C200, Renton, WA 98057.
- What is Garret De Castro's phone number?
- The practice phone number listed in the NPPES registry for Garret De Castro is (866) 259-1629.
- Does Garret De Castro accept Medicare?
- Garret De Castro is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Garret De Castro's NPI active?
- Yes — Garret De Castro's NPI (1427273895) is active in the NPPES registry as of the last update on 2018-05-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.