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

Dr. Silvia Sandoval, PHD

Clinical Social Worker in San Francisco, CA · enumerated 2011.

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

National Provider Identifier

1821380668

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Registry record

Entity type Individual (Type 1)

Name Dr. Silvia Sandoval

Credential PHD

Sex Female

Practice address San Francisco, CA, 94103

Phone (415) 437-3418

Enumeration date May 12, 2011

Last updated in NPPES Jun 26, 2025

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 006938 (CT) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW-6938 (CT) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW-73954 (CA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
004236338	Medicaid	CT	-

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 specialty is Silvia Sandoval?

Silvia Sandoval 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-26.