Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Ester Marina Marin, MSW

Social Worker in Fontana, CA · enumerated 2024.

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

National Provider Identifier

1154142628

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Registry record

Entity type Individual (Type 1)

Name Mrs. Ester Marina Marin

Credential MSW

Sex Female

Practice address 14677 Merrill Ave, Fontana, CA, 92335

Phone (951) 643-2340

Fax (951) 543-9645

Enumeration date Oct 17, 2024

Last updated in NPPES Oct 17, 2024

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 124461 (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

How do I verify Ester Marin's NPI record?

Cross-check NPI 1154142628 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1154142628 active?

Yes, as of the latest NPPES snapshot, NPI 1154142628 is active (record last updated 2024-10-17).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-17.