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THE THRESHOLDS
NPI 1457508749
Clinic/Center - Mental Health (Including Community Mental Health Center) in Chicago, IL

Active since August 19, 2008
1541-1545 E MARQUETTE RD, CHICAGO, IL 60637(773) 572-5500 Get Directions Write a Review

NPPES record last updated: January 9, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jan 9, 2026, Jul 14, 2022, Sep 9, 2021 and 2 more (5 updates tracked since 2018).

About The Thresholds NPPES

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

THE THRESHOLDS (NPI 1457508749), doing business as Southside Housing Mazza House, is a healthcare organization registered as a mental health (including community mental health center) in Chicago, Illinois and active in the NPI registry since August 2008. The organization lists Marcella Klauer, Executive Assistant, as its authorized official.

NPPES Registry Identity

NPI1457508749
Entity TypeOrganization
Primary Taxonomy261QM0801X
Legal Business NameTHE THRESHOLDS
Location Address1541-1545 E MARQUETTE RDChicago, IL 60637
Mailing Address4101 N Ravenswood AveChicago, IL 60613-2193 · (773) 572-5500 · Fax (773) 572-5240
Phone(773) 572-5500
Organization SubpartYes
Authorized OfficialMarcella KlauerExecutive Assistant · (773) 572-5480
Enumeration DateAugust 19, 2008
Last NPPES UpdateJanuary 9, 20265 updates tracked since enumeration
NPPES CertifiedJanuary 9, 2026
✔ NPI 1457508749 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyClinic/Center · Mental Health (Including Community Mental Health Center)Ambulatory Health Care Facilities
Taxonomy Code261QM0801X
Also ListedCommunity Based Residential Treatment Facility, Mental IllnessTaxonomy 320800000X
1541-1545 E MARQUETTE RD, Chicago, IL 60637
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Other Names 1

Doing Business AsSouthside Housing Mazza House

Other Identifiers 1

Medicaid04133IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

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 The Thresholds's NPI number?

The NPI number for The Thresholds is 1457508749. It was assigned to this organization in the NPPES registry on August 19, 2008. The provider is doing business as Southside Housing Mazza House.

Where is The Thresholds located?

The Thresholds is located at 1541-1545 E Marquette Rd, Chicago, IL 60637. The listed phone number is (773) 572-5500.

What is The Thresholds's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Mental Health (Including Community Mental Health Center), with taxonomy code 261QM0801X.

What insurance does The Thresholds accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list The Thresholds 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 The Thresholds was last updated on January 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.