Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arianna Grassmann

Behavior Analyst in Temecula, CA · enumerated 2018.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1033614003

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Registry record

Entity type Individual (Type 1)

Name Arianna Grassmann

Sex Female

Practice address 27720 Jefferson Ave, Temecula, CA, 92590

Phone (951) 699-8640

Enumeration date Mar 29, 2018

Last updated in NPPES Mar 29, 2018

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Arianna Grassmann practice?

The practice location on file with NPPES is in Temecula, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Arianna Grassmann?

The National Provider Identifier (NPI) for Arianna Grassmann is 1033614003, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-29.