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

Mrs. Diane Snell Offner, MSW LCSW

Clinical Social Worker in Claremont, CA · enumerated 2017 · practices at Complete Counseling Services, Inc.

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

National Provider Identifier

1588185284

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Registry record

Entity type Individual (Type 1)

Name Mrs. Diane Snell Offner

Credential MSW LCSW

Sex Female

Practice address Claremont, CA, 91711

Phone (909) 624-0995

Enumeration date Jul 3, 2017

Last updated in NPPES Jul 3, 2017

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS12091 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
LCS12091	Other	CA	CALIFORNIA STATE LICENSE SOCIAL WORK
881822817	Other	CA	NATIONAL ASSOCIATION OF SOCIAL WORKERS

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

What specialty is Diane Offner?

Diane Offner is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Bernard Karmatz Professional Counselor · Claremont, CA NPI 1396892923 John Pellitteri Clinical Neuropsychologist · Claremont, CA NPI 1285857029 Dragana Pitargue Clinical Social Worker · Claremont, CA NPI 1891020202 Complete Counseling Services, Inc Community/Behavioral Health Agency · Claremont, CA NPI 1649594409 Gina Beaman Marriage & Family Therapist · Claremont, CA NPI 1336587427 Theodore Bartholomew Counseling Psychologist · Claremont, CA NPI 1285334029 Sara Masland Psychologist · Claremont, CA NPI 1063385904

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-07-03.