What is William Perez's NPI number?

William Perez's National Provider Identifier (NPI) is 1538058003, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Perez's specialty?

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

Where is William Perez located?

William Perez's practice location on file with NPPES is 4401 Crenshaw Blvd Ste 215, Los Angeles, CA 90043-1200.

What is William Perez's phone number?

The practice phone number listed in the NPPES registry for William Perez is (323) 291-7100.

Is William Perez's NPI active?

Yes — William Perez's NPI (1538058003) is active in the NPPES registry as of the last update on 2025-06-30.

IndividualActive

William Perez

NPI 1538058003 · Behavior Technician · Los Angeles, CA

William Perez is a Behavior Technician provider in Los Angeles, CA (NPI 1538058003).

Provider details

NPI number: 1538058003
Entity type: Individual
Primary specialty: Behavior TechnicianBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Behavior TechnicianPrimary106S00000X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(48/100 index)

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

Registry tenure38% of score
1 yr in NPPES 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

4401 Crenshaw Blvd Ste 215

Los Angeles, CA 90043-1200

Phone: (323) 291-7100

Street-level locationGet directions

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Mailing address