STEPHAN SIMONIAN MD APC
NPI 1871810374
Psychiatry & Neurology - Child & Adolescent Psychiatry in Glendale, CA

Q: What is Stephan Simonian MD Apc's NPI number?

The NPI number for Stephan Simonian MD Apc is 1871810374. It was assigned to this organization in the NPPES registry on April 23, 2010.

Q: What is Stephan Simonian MD Apc's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Active since April 23, 2010

1141 N BRAND BLVD, SUITE # 306, GLENDALE, CA 91202(818) 551-1118(818) 551-1955 Get Directions Write a Review

NPPES record last updated: June 8, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Stephan Simonian Md Apc NPPES

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

STEPHAN SIMONIAN MD APC (NPI 1871810374) is a healthcare organization registered as a child & adolescent psychiatry in Glendale, California and active in the NPI registry since April 2010. The organization lists Stephan Simonian, President, as its authorized official.

NPPES Registry Identity

NPI1871810374

Entity TypeOrganization

Primary Taxonomy2084P0804X

Legal Business NameSTEPHAN SIMONIAN MD APC

Location Address1141 N BRAND BLVD, SUITE # 306Glendale, CA 91202-2511

Mailing Address1141 N Brand Blvd, Suite # 306Glendale, CA 91202-2511 · (818) 551-1118 · Fax (818) 551-1955

Phone(818) 551-1118

Fax(818) 551-1955

Organization SubpartNo

Authorized OfficialStephan SimonianPresident · (818) 551-1118

Enumeration DateApril 23, 2010

Last NPPES UpdateJune 8, 2010

✔ NPI 1871810374 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0804X

Definition

Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

1141 N BRAND BLVD, Glendale, CA 91202

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Stephan Simonian Md Apc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by November 30, 2026

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date

StateCaliforniaEnrollment IDO20100605000098Non-DME Part B · Clinic/Group PracticeDue dateNovember 30, 2026

Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Stephan Simonian MD Apc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Stephan Simonian, M.D.

Psychiatry

NPI 1104924208

1141 N BRAND BLVD SUITE # 306
Glendale, CA 91202

(818) 551-1118

✔ PECOSSame address

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 Stephan Simonian MD Apc's NPI number?

The NPI number for Stephan Simonian MD Apc is 1871810374. It was assigned to this organization in the NPPES registry on April 23, 2010.

Where is Stephan Simonian MD Apc located?

Stephan Simonian MD Apc is located at 1141 N Brand Blvd Suite # 306, Glendale, CA 91202. The listed phone number is (818) 551-1118.

What is Stephan Simonian MD Apc's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Stephan Simonian MD Apc enrolled in Medicare?

Yes. Stephan Simonian MD Apc is registered in the Medicare PECOS enrollment system.

When is Stephan Simonian MD Apc's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by November 30, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Stephan Simonian MD Apc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Psychiatry) reassigns their Medicare billing to Stephan Simonian MD Apc. 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 Stephan Simonian MD Apc was last updated on June 8, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.