NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Hannah Jean Pasternak, LCSW

Clinical Social Worker in Fullerton, CA · enumerated 2022 · practices at Women'S Transitional Living Center.

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

National Provider Identifier

1770228645

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ms. Hannah Jean Pasternak
Credential LCSW
Sex Female
Practice address 201 E. Amerige Ave, Fullerton, CA, 92832
Phone (714) 992-1939
Enumeration date May 4, 2022
Last updated in NPPES Jun 9, 2022

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 107501 (CA) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Hannah Pasternak practice?
The practice location on file with NPPES is in Fullerton, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Hannah Pasternak?
The National Provider Identifier (NPI) for Hannah Pasternak is 1770228645, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-09.