What is Karla Castro's NPI number?

Karla Castro's National Provider Identifier (NPI) is 1609724301, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Karla Castro's specialty?

Karla Castro is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).

Where is Karla Castro located?

Karla Castro's practice location on file with NPPES is 33 Encina Ave Ste 103, Palo Alto, CA 94301-2343.

What is Karla Castro's phone number?

The practice phone number listed in the NPPES registry for Karla Castro is (650) 853-0321.

Is Karla Castro's NPI active?

Yes — Karla Castro's NPI (1609724301) is active in the NPPES registry as of the last update on 2026-03-18.

IndividualActive

Karla Castro

NPI 1609724301 · Specialist · Palo Alto, CA

Karla Castro is a Specialist provider in Palo Alto, CA (NPI 1609724301).

Provider details

NPI number: 1609724301
Entity type: Individual
Primary specialty: SpecialistOther Service Providers
Sex: Female
Sole proprietor: No

Specialties & taxonomies

SpecialistPrimary174400000X
Other Service Providers

Profile Score

Basic profile(46/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
1 documented practice location

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

33 Encina Ave Ste 103

Palo Alto, CA 94301-2343

Phone: (650) 853-0321

Street-level locationGet directions

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Mailing address