GM PSYCHOLOGICAL SERVICES, INC.
NPI 1437288735
Psychologist - Clinical in Oak Park, IL

Q: What is Gm Psychological Services, Inc.'s NPI number?

The NPI number for Gm Psychological Services, Inc. is 1437288735. It was assigned to this organization in the NPPES registry on March 4, 2007.

Q: What is Gm Psychological Services, Inc.'s specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Active since March 04, 2007

1108 LINDEN AVE, OAK PARK, IL 60302(773) 750-3819(708) 383-6948 Get Directions Write a Review

NPPES record last updated: August 22, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Gm Psychological Services, Inc. NPPES

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

GM PSYCHOLOGICAL SERVICES, INC. (NPI 1437288735) is a healthcare organization registered as a clinical in Oak Park, Illinois and active in the NPI registry since March 2007. The organization lists Erika L. Gilyot-montgomery, President, as its authorized official.

NPPES Registry Identity

NPI1437288735

Entity TypeOrganization

Primary Taxonomy103TC0700X

Legal Business NameGM PSYCHOLOGICAL SERVICES, INC.

Location Address1108 LINDEN AVEOak Park, IL 60302-1243

Mailing Address1108 Linden AveOak Park, IL 60302-1243 · (773) 750-3819 · Fax (708) 383-6948

Phone(773) 750-3819

Fax(708) 383-6948

Organization SubpartNo

Authorized OfficialErika L. Gilyot-montgomeryPresident · (773) 750-3819

Enumeration DateMarch 4, 2007

Last NPPES UpdateAugust 22, 2020

✔ NPI 1437288735 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

1108 LINDEN AVE, Oak Park, IL 60302

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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)

Gm Psychological Services, Inc. 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 Gm Psychological Services, Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Erika Gilyot-Montgomery, PSY.D.

Clinical Psychologist

NPI 1700091121

7001 NORTH AVE STE 201
Oak Park, IL 60302

(773) 750-3819

✔ PECOS✔ Accepts Medicare0.5 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 Gm Psychological Services, Inc.'s NPI number?

The NPI number for Gm Psychological Services, Inc. is 1437288735. It was assigned to this organization in the NPPES registry on March 4, 2007.

Where is Gm Psychological Services, Inc. located?

Gm Psychological Services, Inc. is located at 1108 Linden Ave, Oak Park, IL 60302. The listed phone number is (773) 750-3819.

What is Gm Psychological Services, Inc.'s specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Gm Psychological Services, Inc. enrolled in Medicare?

Yes. Gm Psychological Services, Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gm Psychological Services, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Psychologist) reassigns their Medicare billing to Gm Psychological Services, Inc.. 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 Gm Psychological Services, Inc. was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.