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

Ms. Deanna Lee Darby, MFT

Marriage & Family Therapist in Grass Valley, CA · enumerated 2013.

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

National Provider Identifier

1457791477

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Registry record

Entity type Individual (Type 1)
Name Ms. Deanna Lee Darby
Credential MFT
Sex Female
Practice address Grass Valley, CA, 95945
Phone (530) 263-1914
Enumeration date Jul 5, 2013
Last updated in NPPES Jul 5, 2013

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 MFC 40985 (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 Deanna Darby practice?
The practice location on file with NPPES is in Grass Valley, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Deanna Darby?
The National Provider Identifier (NPI) for Deanna Darby is 1457791477, 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 2013-07-05.