Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Michael Samuel Gelbart, LCSW

Clinical Social Worker in San Leandro, CA · enumerated 2006.

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

National Provider Identifier

1992785042

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Registry record

Entity type Individual (Type 1)

Name Mr. Michael Samuel Gelbart

Credential LCSW

Sex Male

Practice address 333 Estudillo Ave, Suite#206, San Leandro, CA, 94577

Phone (510) 287-2527

Fax (510) 357-2527

Enumeration date Jan 17, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS#13607 (CA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier	Type	State	Issuer
CSW136070	Other	CA	MEDI-CAL PROVIDER NUMBER

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

What is the NPI number for Michael Gelbart?

The National Provider Identifier (NPI) for Michael Gelbart is 1992785042, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Gelbart practice?

The practice location on file with NPPES is in San Leandro, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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