1. Home
  2. Directory
  3. Illinois
  4. Chicago
  5. Psychologist
  6. NPI Profile

DREAS & BRENNAN, LTD.
NPI 1104831643
Psychologist - Clinical in Chicago, IL

Active since July 31, 2006
2500 W FARWELL AVE, CHICAGO, IL 60645(773) 743-2466 Get Directions Write a Review

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

About Dreas & Brennan, Ltd. NPPES

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

DREAS & BRENNAN, LTD. (NPI 1104831643) is a healthcare organization registered as a clinical in Chicago, Illinois and active in the NPI registry since July 2006. The organization lists Thomas P. Brennan, Vice President, as its authorized official.

NPPES Registry Identity

NPI1104831643
Entity TypeOrganization
Primary Taxonomy103TC0700X
Legal Business NameDREAS & BRENNAN, LTD.
Location Address2500 W FARWELL AVEChicago, IL 60645-4618
Mailing Address2500 W Farwell AveChicago, IL 60645-4618 · (773) 743-2466
Phone(773) 743-2466
Organization SubpartNo
Authorized OfficialThomas P. BrennanVice President · (773) 743-2466
Enumeration DateJuly 31, 2006
Last NPPES UpdateAugust 22, 2020
✔ NPI 1104831643 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.
2500 W FARWELL AVE, Chicago, IL 60645
Open in Google Maps ↗

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)

Dreas & Brennan, Ltd. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Dreas & Brennan, Ltd., which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Thomas Brennan, PH.D.
Clinical Psychologist
NPI 1720090731
2500 W FARWELL AVE
Chicago, IL 60645
(773) 743-2466
✔ PECOS✔ Accepts MedicareSame address
Gale Dreas, L.C.S.W.
Clinical Social Worker
NPI 1659464022
2500 W FARWELL AVE
Chicago, IL 60645
(774) 743-2466
✔ 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 Dreas & Brennan, Ltd.'s NPI number?

The NPI number for Dreas & Brennan, Ltd. is 1104831643. It was assigned to this organization in the NPPES registry on July 31, 2006.

Where is Dreas & Brennan, Ltd. located?

Dreas & Brennan, Ltd. is located at 2500 W Farwell Ave, Chicago, IL 60645. The listed phone number is (773) 743-2466.

What is Dreas & Brennan, Ltd.'s specialty?

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

Is Dreas & Brennan, Ltd. enrolled in Medicare?

Yes. Dreas & Brennan, Ltd. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Dreas & Brennan, Ltd.?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Dreas & Brennan, Ltd., in Clinical Psychologist and Clinical Social Worker. 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. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Dreas & Brennan, Ltd. 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.