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

STEPHEN THOMAS TREACY
NPI 1609456771
Dentist - Orthodontics and Dentofacial Orthopedics in Chicago, IL

Active since April 12, 2021
801 S PAULINA ST RM 131, CHICAGO, IL 60612(860) 372-0515 Get Directions Write a Review

NPPES record last updated: July 8, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 8, 2026, Jul 18, 2022, Apr 12, 2021 (3 updates tracked since 2021).

About Stephen Thomas Treacy NPPES

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

STEPHEN THOMAS TREACY (NPI 1609456771) is an individual orthodontics and dentofacial orthopedics provider in Chicago, Illinois, licensed in North Carolina (13650) and active in the NPI registry since April 2021. He maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1609456771
Entity TypeIndividualMale
Primary Taxonomy1223X0400X
Provider Legal NameSTEPHEN THOMAS TREACY
Location Address801 S PAULINA ST RM 131Chicago, IL 60612-7210
Mailing Address801 S Paulina St Rm 131Chicago, IL 60612-7210
Sole ProprietorNo
Enumeration DateApril 12, 2021
Last NPPES UpdateJuly 8, 20263 updates tracked since enumeration
NPPES CertifiedJuly 8, 2026
NPI 1609456771 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyDentist · Orthodontics and Dentofacial OrthopedicsDental Providers
Taxonomy Code1223X0400X
Licenses Licensed in NC · 13650 Licensed in SC · 10725
Definition
That area of dentistry concerned with the supervision, guidance and correction of the growing or mature dentofacial structures, including those conditions that require movement of teeth or correction of malrelationships and malformations of their related structures and the adjustment of relationships between and among teeth and facial bones by the application of forces and/or the stimulation and redirection of functional forces within the craniofacial complex. Major responsibilities of orthodontic practice include the diagnosis, prevention, interception and treatment of all forms of malocclusion of the teeth and associated alterations in their surrounding structures; the design, application and control of functional and corrective appliances; and the guidance of the dentition and its supporting structures to attain and maintain optimum occlusal relations in physiologic and esthetic harmony among facial and cranial structures.
Also ListedDentist · General PracticeTaxonomy 1223G0001X · License 019033126 (IL)
801 S PAULINA ST RM 131, Chicago, IL 60612

Secondary Practice Location 1

Location 15160 S Pulaski Rd Ste 102Chicago, IL 60632-4253 · Phone (773) 423-2810

Accepted Insurance

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Dentist
801 S PAULINA ST RM 131
CHICAGO, IL 60612
Dentist (Orthodontics and Dentofacial Orthopedics)
801 S PAULINA ST RM 131
CHICAGO, IL 60612
Dentist (Orthodontics and Dentofacial Orthopedics)
801 S PAULINA ST RM 131
CHICAGO, IL 60612
Dentist (Orthodontics and Dentofacial Orthopedics)
801 S PAULINA ST RM 131
CHICAGO, IL 60612
Dentist (General Practice)
801 S PAULINA ST RM 131
CHICAGO, IL 60612
Dentist (General Practice)
801 S PAULINA ST RM 131
CHICAGO, IL 60612

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 Stephen Treacy's NPI number?

The NPI number for Stephen Treacy is 1609456771. It was assigned to this individual provider in the NPPES registry on April 12, 2021.

Where is Stephen Treacy located?

Stephen Treacy practices at 801 S Paulina St Rm 131, Chicago, IL 60612. The listed phone number is (860) 372-0515.

What is Stephen Treacy's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Orthodontics and Dentofacial Orthopedics, with taxonomy code 1223X0400X.

What insurance does Stephen Treacy accept?

Health plans from Ambetter from Absolute Total Care, Ambetter of North Carolina, Ambetter of Tennessee, Blue Cross and Blue Shield of Montana and Blue Cross and Blue Shield of Oklahoma and 7 other insurers list Stephen Treacy as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Stephen Treacy was last updated on July 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 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.