What is Viviane Chang's NPI number?

Viviane Chang's National Provider Identifier (NPI) is 1023900123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Viviane Chang's specialty?

Viviane Chang is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).

Where is Viviane Chang located?

Viviane Chang's practice location on file with NPPES is 115 Town and Country Dr Ste a, Danville, CA 94526-3960.

What is Viviane Chang's phone number?

The practice phone number listed in the NPPES registry for Viviane Chang is (731) 393-9386.

Is Viviane Chang's NPI active?

Yes — Viviane Chang's NPI (1023900123) is active in the NPPES registry as of the last update on 2025-07-15.

IndividualActive

Viviane Chang, PH.D.

NPI 1023900123 · Psychologist · Danville, CA

Viviane Chang, PH.D. is a Psychologist provider in Danville, CA (NPI 1023900123).

Provider details

NPI number: 1023900123
Entity type: Individual
Primary specialty: PsychologistBehavioral Health & Social Service Providers
Credential: PH.D.
Sole proprietor: No
License: 35925 (CA)

Specialties & taxonomies

PsychologistPrimary103T00000XLicense 35925 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(54/100 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
100% 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

115 Town and Country Dr Ste a

Danville, CA 94526-3960

Phone: (731) 393-9386

Street-level locationGet directions

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Mailing address