JANET M STIER PHD CLINICAL PSYCHOLOGIST PC
NPI 1861206781
Clinic/Center - Adolescent and Children Mental Health in Valencia, CA

Q: What is Janet M Stier Phd Clinical Psychologist PC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Adolescent and Children Mental Health, with taxonomy code 261QM0855X.

Active since February 03, 2025

23822 VALENCIA BLVD STE 203, VALENCIA, CA 91355(661) 310-8410(661) 678-0711 Get Directions Write a Review

NPPES record last updated: September 2, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 2, 2025, Feb 3, 2025 (2 updates tracked since 2025).

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About Janet M Stier Phd Clinical Psychologist Pc NPPES

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

JANET M STIER PHD CLINICAL PSYCHOLOGIST PC (NPI 1861206781) is a healthcare organization registered as an adolescent and children mental health in Valencia, California and active in the NPI registry since February 2025. The organization lists Janet M Stier, Clinical Psychologist/president, as its authorized official.

NPPES Registry Identity

NPI1861206781

Entity TypeOrganization

Primary Taxonomy261QM0855X

Legal Business NameJANET M STIER PHD CLINICAL PSYCHOLOGIST PC

Location Address23822 VALENCIA BLVD STE 203Valencia, CA 91355-5344

Mailing Address23822 Valencia Blvd Ste 203Valencia, CA 91355-5344 · (661) 310-8410 · Fax (661) 678-0711

Phone(661) 310-8410

Fax(661) 678-0711

Organization SubpartNo

Authorized OfficialJanet M StierClinical Psychologist/president · (661) 310-8410

Enumeration DateFebruary 3, 2025

Last NPPES UpdateSeptember 2, 20252 updates tracked since enumeration

NPPES CertifiedSeptember 2, 2025

✔ NPI 1861206781 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyClinic/Center · Adolescent and Children Mental HealthAmbulatory Health Care Facilities

Taxonomy Code261QM0855X

Definition

An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to mental and behavioral disorders in children and adolescents. Services may be provided to parents and family members of the patient in the form of conjoint, group, or individual therapy, and education and/or training.

Also ListedClinic/Center · Adult Mental HealthTaxonomy 261QM0850X

23822 VALENCIA BLVD STE 203, Valencia, CA 91355

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Other Providers at the Same Location NPPES

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

CHELSEA SPAGNOLA MS, LMFT

Marriage & Family Therapist

23822 VALENCIA BLVD STE 203
VALENCIA, CA 91355

Los Angeles County (661) 857-0335

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 Janet M Stier Phd Clinical Psychologist PC's NPI number?

The NPI number for Janet M Stier Phd Clinical Psychologist PC is 1861206781. It was assigned to this organization in the NPPES registry on February 3, 2025.

Where is Janet M Stier Phd Clinical Psychologist PC located?

Janet M Stier Phd Clinical Psychologist PC is located at 23822 Valencia Blvd Ste 203, Valencia, CA 91355. The listed phone number is (661) 310-8410.

What is Janet M Stier Phd Clinical Psychologist PC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Adolescent and Children Mental Health, with taxonomy code 261QM0855X.

When was this NPI record last updated?

The NPPES record for Janet M Stier Phd Clinical Psychologist PC was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.