What is Sydney Gagnier's NPI number?

Sydney Gagnier's National Provider Identifier (NPI) is 1659217321, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Sydney Gagnier's specialty?

Sydney Gagnier is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).

Where is Sydney Gagnier located?

Sydney Gagnier's practice location on file with NPPES is 5681 Tanner Ridge Ave, Westlake Village, CA 91362-5236.

What is Sydney Gagnier's phone number?

The practice phone number listed in the NPPES registry for Sydney Gagnier is (818) 425-3468.

Is Sydney Gagnier's NPI active?

Yes — Sydney Gagnier's NPI (1659217321) is active in the NPPES registry as of the last update on 2026-04-27.

IndividualActive

Sydney Gagnier

NPI 1659217321 · Social Worker · Westlake Village, CA

Sydney Gagnier is a Social Worker provider in Westlake Village, CA (NPI 1659217321).

Provider details

NPI number: 1659217321
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: Yes
License: ASW95812 (CA)

Specialties & taxonomies

Social WorkerPrimary104100000XLicense ASW95812 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(53/100 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

5681 Tanner Ridge Ave

Westlake Village, CA 91362-5236

Phone: (818) 425-3468

Street-level locationGet directions

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Mailing address