NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Marykatherine Proietta

Clinical Social Worker in Redondo Beach, CA · enumerated 2022.

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

National Provider Identifier

1740931351

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Marykatherine Proietta
Sex Female
Practice address Redondo Beach, CA, 90278
Phone (424) 261-8085
Enumeration date Jan 14, 2022
Last updated in NPPES Jan 14, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 103179 (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

Where does Marykatherine Proietta practice?
The practice location on file with NPPES is in Redondo Beach, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marykatherine Proietta?
The National Provider Identifier (NPI) for Marykatherine Proietta is 1740931351, 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 2022-01-14.