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

Gary Dean Siela, LMFT

Marriage & Family Therapist in Windsor, CA · enumerated 2007.

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

National Provider Identifier

1538375159

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Registry record

Entity type Individual (Type 1)
Name Gary Dean Siela
Credential LMFT
Sex Male
Practice address Windsor, CA, 95492
Phone (707) 836-6350
Enumeration date May 14, 2007
Last updated in NPPES Feb 11, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License MFC47106 (CA) Secondary
106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 47106 (CA) Primary
LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

Other identifiers

Identifier Type State Issuer
1538375159 Medicaid CA -

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

Where does Gary Siela practice?
The practice location on file with NPPES is in Windsor, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gary Siela?
The National Provider Identifier (NPI) for Gary Siela is 1538375159, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-02-11.