Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marian Elizabeth Castelluccio, LCSW

Social Worker in Fremont, CA · enumerated 2007.

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

National Provider Identifier

1710198643

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Registry record

Entity type Individual (Type 1)

Name Marian Elizabeth Castelluccio

Credential LCSW

Sex Female

Practice address 39155 Liberty St Ste G710, Fremont, CA, 94538

Phone (510) 795-2434

Fax (510) 793-3972

Enumeration date May 24, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 19641 (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

Is NPI 1710198643 active?

Yes, as of the latest NPPES snapshot, NPI 1710198643 is active (record last updated 2007-07-08).

How do I verify Marian Castelluccio's NPI record?

Cross-check NPI 1710198643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Maureen Orphanos Clinical Social Worker · Fremont, CA NPI 1437287646 John Cotrufo Psychiatry Physician · Fremont, CA NPI 1295945467 Philie Chan Clinical Social Worker · Fremont, CA NPI 1063623569 Wendy Zastawney Clinical Social Worker · Fremont, CA NPI 1548461452 Louis Esparza Case Manager/Care Coordinator · Fremont, CA NPI 1013118504 Hetal Africawala Clinical Social Worker · Fremont, CA NPI 1730375163 Julia Aplin Case Manager/Care Coordinator · Fremont, CA NPI 1992978548 Sophia Yu Clinical Social Worker · Fremont, CA NPI 1326310327

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.