What is William Swift's NPI number?

William Swift's National Provider Identifier (NPI) is 1265360234, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Swift's specialty?

William Swift is listed in the NPPES registry with a primary specialty of Assistant Behavior Analyst (Behavioral Health & Social Service Providers).

Where is William Swift located?

William Swift's practice location on file with NPPES is 2978 Sunbird Dr, Fairfield, CA 94533-1243.

What is William Swift's phone number?

The practice phone number listed in the NPPES registry for William Swift is (707) 908-9800.

Is William Swift's NPI active?

Yes — William Swift's NPI (1265360234) is active in the NPPES registry as of the last update on 2026-05-11.

IndividualActive

William Swift

NPI 1265360234 · Assistant Behavior Analyst · Fairfield, CA

William Swift is a Assistant Behavior Analyst provider in Fairfield, CA (NPI 1265360234).

Provider details

NPI number: 1265360234
Entity type: Individual
Primary specialty: Assistant Behavior AnalystBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Assistant Behavior AnalystPrimary106E00000X
Behavioral Health & Social 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

2978 Sunbird Dr

Fairfield, CA 94533-1243

Phone: (707) 908-9800

Street-level locationGet directions

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Mailing address