Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diane Sharon Gell, LMFT

Marriage & Family Therapist in Ontario, CA · enumerated 2011 · practices at West End Family Counseling Service.

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

National Provider Identifier

1699074641

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Registry record

Entity type Individual (Type 1)

Name Diane Sharon Gell

Credential LMFT

Sex Female

Practice address 855 N Euclid Ave, Ontario, CA, 91762

Phone (909) 983-2020

Fax (909) 983-6847

Enumeration date Mar 16, 2011

Last updated in NPPES Jul 5, 2018

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 49489 (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
951946482	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

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.

What specialty is Diane Gell?

Diane Gell is registered in NPPES with the primary taxonomy of Marriage & Family Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Angela Talbot Marriage & Family Therapist · Ontario, CA NPI 1164577342 Cecilia Johnson Clinical Social Worker · Ontario, CA NPI 1629191184 Jed Shafer Clinical Social Worker · Ontario, CA NPI 1326161795 Sara Nixon Counselor · Ontario, CA NPI 1730202169 Sherry Christensen Clinical Social Worker · Ontario, CA NPI 1629191093 West End Family Counseling Service Community/Behavioral Health Agency · Ontario, CA NPI 1942323563 Bryn Barkan Clinical Social Worker · Ontario, CA NPI 1538282991 Elizabeth Gatt-Auzenne Marriage & Family Therapist · Ontario, CA NPI 1174646574

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-05.