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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

NESTOR DANIEL HERMOSILLO
NPI 1619802550
Marriage & Family Therapist in Ontario, CA

Active since June 13, 2026
3281 E GUASTI RD STE 600, ONTARIO, CA 91761(909) 323-7100 Get Directions Write a Review

NPPES record added: June 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Nestor Daniel Hermosillo NPPES

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

NESTOR DANIEL HERMOSILLO (NPI 1619802550) is an individual marriage & family therapist in Ontario, California and active in the NPI registry since June 2026.

NPPES Registry Identity

NPI1619802550
Entity TypeIndividualMale
Primary Taxonomy106H00000X
Provider Legal NameNESTOR DANIEL HERMOSILLO
Location Address3281 E GUASTI RD STE 600Ontario, CA 91761-7611
Mailing Address1831 N Greengrove StOrange, CA 92865-4618 · (562) 206-4178
Phone(909) 323-7100
Sole ProprietorNo
Enumeration DateJune 13, 2026
NPPES CertifiedJune 13, 2026
✔ NPI 1619802550 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers
Taxonomy Code106H00000X
Definition
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.
3281 E GUASTI RD STE 600, Ontario, CA 91761
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Other Providers at the Same Location NPPES 4

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

LORENA EGUIA
Social Worker (Clinical)
3281 E GUASTI RD STE 600
ONTARIO, CA 91761
San Bernardino County (877) 462-7735
SARAH THOMAS FAZELI AMFT
Counselor (Mental Health)
3281 E GUASTI RD STE 600
ONTARIO, CA 91761
San Bernardino County (877) 462-7735
JOSELINE GONZALEZ
Social Worker (Clinical)
3281 E GUASTI RD STE 600
ONTARIO, CA 91761
San Bernardino County (909) 760-4229
JANINE GARCIA CURIEL
Marriage & Family Therapist
3281 E GUASTI RD STE 600
ONTARIO, CA 91761
San Bernardino County (909) 841-2504

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 Nestor Hermosillo's NPI number?

The NPI number for Nestor Hermosillo is 1619802550. It was assigned to this individual provider in the NPPES registry on June 13, 2026.

Where is Nestor Hermosillo located?

Nestor Hermosillo practices at 3281 E Guasti Rd Ste 600, Ontario, CA 91761. The listed phone number is (909) 323-7100.

What is Nestor Hermosillo's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

When was this NPI record last updated?

The NPPES record for Nestor Hermosillo was last updated on June 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.