What is Gustavo Sierra's NPI number?

Gustavo Sierra's National Provider Identifier (NPI) is 1265294037, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Gustavo Sierra's specialty?

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

Where is Gustavo Sierra located?

Gustavo Sierra's practice location on file with NPPES is 1633 Paloma St, Barstow, CA 92311-5614.

What is Gustavo Sierra's phone number?

The practice phone number listed in the NPPES registry for Gustavo Sierra is (442) 309-6244.

Is Gustavo Sierra's NPI active?

Yes — Gustavo Sierra's NPI (1265294037) is active in the NPPES registry as of the last update on 2026-02-05.

IndividualActive

Gustavo Sierra

NPI 1265294037 · Behavior Technician · Barstow, CA

Gustavo Sierra is a Behavior Technician provider in Barstow, CA (NPI 1265294037).

Provider details

NPI number: 1265294037
Entity type: Individual
Primary specialty: Behavior TechnicianBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No
License: RBT-25-481176 (CA)

Specialties & taxonomies

Behavior TechnicianPrimary106S00000XLicense RBT-25-481176 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(57/100 index)

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

Registry tenure38% of score
2 yrs in NPPES 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

1633 Paloma St

Barstow, CA 92311-5614

Phone: (442) 309-6244

Street-level locationGet directions

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Mailing address