What is Derin Tosun's NPI number?

Derin Tosun's National Provider Identifier (NPI) is 1255275855, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Derin Tosun's specialty?

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

Where is Derin Tosun located?

Derin Tosun's practice location on file with NPPES is 3419 Valle Verde Dr, Napa, CA 94558-2414.

What is Derin Tosun's phone number?

The practice phone number listed in the NPPES registry for Derin Tosun is (707) 299-8250.

Is Derin Tosun's NPI active?

Yes — Derin Tosun's NPI (1255275855) is active in the NPPES registry as of the last update on 2026-04-15.

IndividualActive

Derin Tosun

NPI 1255275855 · Behavior Technician · Napa, CA

Derin Tosun is a Behavior Technician provider in Napa, CA (NPI 1255275855).

Provider details

NPI number: 1255275855
Entity type: Individual
Primary specialty: Behavior TechnicianBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: No

Specialties & taxonomies

Behavior TechnicianPrimary106S00000X
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

3419 Valle Verde Dr

Napa, CA 94558-2414

Phone: (707) 299-8250

Fax: (707) 635-8215

Street-level locationGet directions

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Mailing address