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Ms. Karen Elizabeth Diaz, MFT

Marriage & Family Therapist in Vallejo, CA · enumerated 2006.

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

National Provider Identifier

1144386657

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Registry record

Entity type Individual (Type 1)
Name Ms. Karen Elizabeth Diaz
Credential MFT
Sex Female
Practice address 800 Sereno Dr, Vallejo, CA, 94589
Phone (707) 651-2589
Enumeration date Dec 29, 2006
Last updated in NPPES Oct 9, 2024

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License MFC 44450 (CA) Primary

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 Karen Diaz practice?
The practice location on file with NPPES is in Vallejo, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Karen Diaz?
The National Provider Identifier (NPI) for Karen Diaz is 1144386657, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-09.