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

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: November 08, 2026.

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

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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Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Janet M Stier Phd Clinical Psychologist Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Janet M Stier Phd Clinical Psychologist PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Janet Stier, PH.D.
Clinical Psychologist
NPI 1376809921
21545 CENTRE POINTE PKWY
Santa Clarita, CA 91350
(661) 259-9439
✔ PECOS✔ Accepts Medicare2.2 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

Is Janet M Stier Phd Clinical Psychologist PC enrolled in Medicare?

Yes. Janet M Stier Phd Clinical Psychologist PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Janet M Stier Phd Clinical Psychologist PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Psychologist) reassigns their Medicare billing to Janet M Stier Phd Clinical Psychologist PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 14 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.