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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

PSYCHIATRY AND MENTAL HEALTH, A PHYSICIAN ASSISTANT CORPORATION
NPI 1538044565
Physician Assistant in Northridge, CA

Active since August 08, 2025
17074 DEVONSHIRE ST, NORTHRIDGE, CA 91325(818) 804-8227(888) 801-0607 Get Directions Write a Review

NPPES record last updated: September 22, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 22, 2026, Aug 14, 2025, Aug 8, 2025 (3 updates tracked since 2025).

About Psychiatry And Mental Health, A Physician Assistant Corporation NPPES

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

PSYCHIATRY AND MENTAL HEALTH, A PHYSICIAN ASSISTANT CORPORATION (NPI 1538044565) is a healthcare organization registered as a physician assistant in Northridge, California and active in the NPI registry since August 2025. The organization lists Erwin Hernandez, Vice President, as its authorized official.

NPPES Registry Identity

NPI1538044565
Entity TypeOrganization
Primary Taxonomy363A00000X
Legal Business NamePSYCHIATRY AND MENTAL HEALTH, A PHYSICIAN ASSISTANT CORPORATION
Location Address17074 DEVONSHIRE STNorthridge, CA 91325-1617
Mailing Address17074 Devonshire StNorthridge, CA 91325-1617 · (818) 804-8227
Phone(818) 804-8227
Fax(888) 801-0607
Organization SubpartNo
Authorized OfficialErwin HernandezVice President · (818) 804-8227
Enumeration DateAugust 8, 2025
Last NPPES UpdateSeptember 22, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 22, 2026
✔ NPI 1538044565 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Also ListedMarriage & Family TherapistTaxonomy 106H00000X
17074 DEVONSHIRE ST, Northridge, CA 91325
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Psychiatry And Mental Health, A Physician Assistant Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

3

Medicare enrollment records show 3 clinicians reassign Medicare billing to Psychiatry And Mental Health, A Physician Assistant Corporation, which bills Medicare for the services they deliver. They are listed nearest first.

Clinicians, nearest first (3)

Tiran Ambartsumyan, PSY. D
Marriage and Family Therapist
NPI 1770149213
100 N BRAND BLVD STE 210
Glendale, CA 91203
(818) 399-1214
✔ PECOS16 mi
Ethel Antonio, NP
Nurse Practitioner
NPI 1386778967
31194 LA BAYA DR
Westlake Village, CA 91362
(805) 341-3416
✔ PECOS✔ Accepts Medicare18 mi
Leslie Tsang, D.O.
Psychiatry
NPI 1013045129
900 COLUSA AVE STE 205A
Berkeley, CA 94707
(415) 706-4509
✔ PECOS328 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 Psychiatry And Mental Health, A Physician Assistant Corporation's NPI number?

The NPI number for Psychiatry And Mental Health, A Physician Assistant Corporation is 1538044565. It was assigned to this organization in the NPPES registry on August 8, 2025.

Where is Psychiatry And Mental Health, A Physician Assistant Corporation located?

Psychiatry And Mental Health, A Physician Assistant Corporation is located at 17074 Devonshire St, Northridge, CA 91325. The listed phone number is (818) 804-8227.

What is Psychiatry And Mental Health, A Physician Assistant Corporation's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Psychiatry And Mental Health, A Physician Assistant Corporation enrolled in Medicare?

Yes. Psychiatry And Mental Health, A Physician Assistant Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Psychiatry And Mental Health, A Physician Assistant Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Psychiatry And Mental Health, A Physician Assistant Corporation, in Marriage and Family Therapist, Nurse Practitioner and Psychiatry. 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 Psychiatry And Mental Health, A Physician Assistant Corporation was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days 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.