Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Ellen F Rittenberg, MSW ACSW

Mental Health Counselor in Valencia, CA · enumerated 2008.

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

National Provider Identifier

1508029810

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Registry record

Entity type Individual (Type 1)

Name Mrs. Ellen F Rittenberg

Credential MSW ACSW

Sex Female

Practice address 25736 Player Dr Unit R8, Valencia, CA, 91355

Phone (310) 617-0154

Fax (661) 288-1480

Enumeration date Jul 7, 2008

Last updated in NPPES Oct 21, 2022

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Ellen Rittenberg?

The National Provider Identifier (NPI) for Ellen Rittenberg is 1508029810, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ellen Rittenberg practice?

The practice location on file with NPPES is in Valencia, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-21.