DR MARGOT GAY MAHAN & ASSOC PC
NPI 1083929327
Psychologist - Clinical in Naperville, IL

Q: What is Dr Margot Gay Mahan & Assoc PC's NPI number?

The NPI number for Dr Margot Gay Mahan & Assoc PC is 1083929327. It was assigned to this organization in the NPPES registry on August 11, 2010.

Q: What is Dr Margot Gay Mahan & Assoc PC's specialty?

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

Active since August 11, 2010

1555 NAPERVILLE WHEATON RD, SUITE 115, NAPERVILLE, IL 60563(312) 719-1360(773) 751-2250 Get Directions Write a Review

NPPES record last updated: August 11, 2010. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Dr Margot Gay Mahan & Assoc Pc NPPES

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

DR MARGOT GAY MAHAN & ASSOC PC (NPI 1083929327) is a healthcare organization registered as a clinical in Naperville, Illinois and active in the NPI registry since August 2010. The organization lists Margot Gay Mahan, President, as its authorized official.

NPPES Registry Identity

NPI1083929327

Entity TypeOrganization

Primary Taxonomy103TC0700X

Legal Business NameDR MARGOT GAY MAHAN & ASSOC PC

Location Address1555 NAPERVILLE WHEATON RD, SUITE 115Naperville, IL 60563-1557

Mailing Address1555 Naperville Wheaton Rd, Suite 115Naperville, IL 60563-1557 · (312) 719-1360 · Fax (773) 751-2250

Phone(312) 719-1360

Fax(773) 751-2250

Organization SubpartNo

Authorized OfficialMargot Gay MahanPresident · (312) 719-1360

Enumeration DateAugust 11, 2010

✔ NPI 1083929327 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

License✔ Licensed in IL · 071006277

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.

1555 NAPERVILLE WHEATON RD, Naperville, IL 60563

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Other Identifiers 1

Other4098289017IL · Bc/bs

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr Margot Gay Mahan & Assoc 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 Dr Margot Gay Mahan & Assoc PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Margot Mahan, PSY.D.

Clinical Psychologist

NPI 1669568077

1555 NAPERVILLE-WHEATON RD SUITE 113
Naperville, IL 60563

(312) 719-1360

✔ PECOS✔ Accepts MedicareSame 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 Dr Margot Gay Mahan & Assoc PC's NPI number?

The NPI number for Dr Margot Gay Mahan & Assoc PC is 1083929327. It was assigned to this organization in the NPPES registry on August 11, 2010.

Where is Dr Margot Gay Mahan & Assoc PC located?

Dr Margot Gay Mahan & Assoc PC is located at 1555 Naperville Wheaton Rd Suite 115, Naperville, IL 60563. The listed phone number is (312) 719-1360.

What is Dr Margot Gay Mahan & Assoc PC's specialty?

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

Is Dr Margot Gay Mahan & Assoc PC enrolled in Medicare?

Yes. Dr Margot Gay Mahan & Assoc PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Dr Margot Gay Mahan & Assoc PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Psychologist) reassigns their Medicare billing to Dr Margot Gay Mahan & Assoc 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 Dr Margot Gay Mahan & Assoc PC was last updated on August 11, 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.