Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mary Catherine Taylor Siebel, PHD

Clinical Psychologist in Daly City, CA · enumerated 2006.

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

National Provider Identifier

1083779508

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Registry record

Entity type Individual (Type 1)

Name Dr. Mary Catherine Taylor Siebel

Credential PHD

Sex Female

Practice address 1500 Southgate Ave, Suite 301, Daly City, CA, 94015

Phone (415) 455-9572

Fax (650) 755-0410

Enumeration date Dec 26, 2006

Last updated in NPPES Feb 23, 2015

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY7821 (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
PSY7821	Other	CA	PSYCHOLOGY

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.

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Frequently asked questions

How do I verify Mary Taylor Siebel's NPI record?

Cross-check NPI 1083779508 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1083779508 active?

Yes, as of the latest NPPES snapshot, NPI 1083779508 is active (record last updated 2015-02-23).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-23.