COLLEEN ANNE O'SULLIVAN LSW
NPI 1659225530
Social Worker - Clinical in Chicago, IL

Active since February 25, 2026
10801 S WESTERN AVE STE 2B, CHICAGO, IL 60643(708) 586-7357 Get Directions Write a Review

NPPES record last updated: February 25, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Colleen Anne O'sullivan Lsw NPPES

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

COLLEEN ANNE O'SULLIVAN LSW (NPI 1659225530) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (150118375) and active in the NPI registry since February 2026.

NPPES Registry Identity

NPI1659225530
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameCOLLEEN ANNE O'SULLIVANCredential: LSW
Location Address10801 S WESTERN AVE STE 2BChicago, IL 60643-3223
Mailing Address2737 Union StBlue Island, IL 60406-1926 · (773) 351-0519
Sole ProprietorNo
Enumeration DateFebruary 25, 2026
NPPES CertifiedFebruary 25, 2026
NPI 1659225530 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in IL · 150118375
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
10801 S WESTERN AVE STE 2B, Chicago, IL 60643

Other Providers at the Same Location NPPES 17

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

Counselor (Professional)
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643
Social Worker (Clinical)
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643
Social Worker (Clinical)
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643
Counselor (Mental Health)
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643
Counselor (Mental Health)
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643
Psychologist (Clinical)
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643
Counselor (Mental Health)
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643
Counselor
10801 S WESTERN AVE STE 2B
CHICAGO, IL 60643

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 Colleen O'sullivan's NPI number?

The NPI number for Colleen O'sullivan is 1659225530. It was assigned to this individual provider in the NPPES registry on February 25, 2026.

Where is Colleen O'sullivan located?

Colleen O'sullivan practices at 10801 S Western Ave Ste 2B, Chicago, IL 60643. The listed phone number is (708) 586-7357.

What is Colleen O'sullivan's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Colleen O'sullivan was last updated on February 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.