What is Nayoung Song's NPI number?

Nayoung Song's National Provider Identifier (NPI) is 1306707930, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Nayoung Song's specialty?

Nayoung Song is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).

Where is Nayoung Song located?

Nayoung Song's practice location on file with NPPES is 20655 Maria Ct, Castro Valley, CA 94546-4462.

What is Nayoung Song's phone number?

The practice phone number listed in the NPPES registry for Nayoung Song is (415) 985-5933.

Is Nayoung Song's NPI active?

Yes — Nayoung Song's NPI (1306707930) is active in the NPPES registry as of the last update on 2025-11-21.

IndividualActive

Nayoung Song, RD

NPI 1306707930 · Registered Dietitian · Castro Valley, CA

Nayoung Song, RD is a Registered Dietitian provider in Castro Valley, CA (NPI 1306707930).

Provider details

NPI number: 1306707930
Entity type: Individual
Primary specialty: Registered DietitianDietary & Nutritional Service Providers
Credential: RD
Sex: Female
Sole proprietor: Yes

Specialties & taxonomies

Registered DietitianPrimary133V00000X
Dietary & Nutritional Service Providers

Profile Score

Basic profile(47/100 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

20655 Maria Ct

Castro Valley, CA 94546-4462

Phone: (415) 985-5933

Street-level locationGet directions

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Mailing address