What is Preston Onwu's NPI number?

Preston Onwu's National Provider Identifier (NPI) is 1932075611, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Preston Onwu's specialty?

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

Where is Preston Onwu located?

Preston Onwu's practice location on file with NPPES is 12459 Lewis St Ste 201, Garden Grove, CA 92840-6606.

What is Preston Onwu's phone number?

The practice phone number listed in the NPPES registry for Preston Onwu is (800) 249-1266.

Is Preston Onwu's NPI active?

Yes — Preston Onwu's NPI (1932075611) is active in the NPPES registry as of the last update on 2025-11-18.

IndividualActive

Preston Onwu

NPI 1932075611 · Behavior Technician · Garden Grove, CA

Preston Onwu is a Behavior Technician provider in Garden Grove, CA (NPI 1932075611).

Provider details

NPI number: 1932075611
Entity type: Individual
Primary specialty: Behavior TechnicianBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: Yes

Specialties & taxonomies

Behavior TechnicianPrimary106S00000X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(47/100 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

12459 Lewis St Ste 201

Garden Grove, CA 92840-6606

Phone: (800) 249-1266

Street-level locationGet directions

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Mailing address