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DIANA SEIF
NPI 1942571344
Counselor - Mental Health in Ontario, CA

Active since January 18, 2012
1556 S SULTANA AVE, ONTARIO, CA 91761(909) 418-6923 Get Directions Write a Review

NPPES record last updated: January 18, 2012. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Diana Seif NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DIANA SEIF (NPI 1942571344) is an individual mental health provider in Ontario, California and active in the NPI registry since January 2012.

NPPES Registry Identity

NPI1942571344
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameDIANA SEIF
Location Address1556 S SULTANA AVEOntario, CA 91761-4238
Mailing Address1556 S Sultana AveOntario, CA 91761-4238 · (909) 418-6923
Phone(909) 418-6923
Sole ProprietorYes
Enumeration DateJanuary 18, 2012
✔ NPI 1942571344 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
1556 S SULTANA AVE, Ontario, CA 91761
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LESLIE SAMANTHA MORENO
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923
ALEXANDRIA ROSE HARVEY
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923
JENNIFER MICHAELS
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923
VANESSA QUINONES
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923
CASSANDRA CASTELLANO BECERRA
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923
ALEXANDRIA NOELLE KORHELY-DAY
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923
VICTORIA VALENZUELA
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923
MR. VICTOR R SANCHEZ JR.
Student in an Organized Health Care Education/Training Program
1556 S SULTANA AVE
ONTARIO, CA 91761
San Bernardino County (909) 418-6923

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Diana Seif's NPI number?

The NPI number for Diana Seif is 1942571344. It was assigned to this individual provider in the NPPES registry on January 18, 2012.

Where is Diana Seif located?

Diana Seif practices at 1556 S Sultana Ave, Ontario, CA 91761. The listed phone number is (909) 418-6923.

What is Diana Seif's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Diana Seif was last updated on January 18, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.