NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Caitlin Buck

Clinical Social Worker in Downey, CA · enumerated 2012 · practices at County of Los Angeles Auditor Controller.

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

National Provider Identifier

1164782587

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ms. Caitlin Buck
Sex Female
Practice address 7285 Quill Dr, Downey, CA, 90242
Phone (562) 940-6077
Enumeration date May 18, 2012
Last updated in NPPES Mar 17, 2018

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers Secondary
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 37140 (CA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Caitlin Buck?
Caitlin Buck is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-17.