NATHAN WILLIAM FLESSNER LCSW
NPI 1619688603
Social Worker - Clinical in Chicago, IL

Active since December 09, 2022
2755 N PINE GROVE AVE, CHICAGO, IL 60614(312) 259-2665 Get Directions Write a Review

NPPES record last updated: December 9, 2022. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Nathan William Flessner Lcsw NPPES

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

NATHAN WILLIAM FLESSNER LCSW (NPI 1619688603) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (149.025006) and active in the NPI registry since December 2022.

NPPES Registry Identity

NPI1619688603
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameNATHAN WILLIAM FLESSNERCredential: LCSW
Location Address2755 N PINE GROVE AVEChicago, IL 60614-6109
Mailing Address3138 W Lyndale St Unit 1Chicago, IL 60647-2824 · (309) 826-9552
Sole ProprietorNo
Enumeration DateDecember 9, 2022
NPPES CertifiedDecember 9, 2022
NPI 1619688603 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 · 149.025006
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.

2755 N PINE GROVE AVE, Chicago, IL 60614

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Opted out of Medicare

Nathan William Flessner Lcsw has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 1, 2024 through January 1, 2026.

Opt-Out Effective DateJanuary 1, 2024
Opt-Out In Effect ThroughJanuary 1, 2026Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 20

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

Social Worker (Clinical)
2755 N PINE GROVE AVE
CHICAGO, IL 60614
Psychologist
2755 N PINE GROVE AVE
CHICAGO, IL 60614
Counselor
2755 N PINE GROVE AVE
CHICAGO, IL 60614
Counselor (Professional)
2755 N PINE GROVE AVE
CHICAGO, IL 60614
Marriage & Family Therapist
2755 N PINE GROVE AVE
CHICAGO, IL 60614
Social Worker
2755 N PINE GROVE AVE
CHICAGO, IL 60614
Social Worker (Clinical)
2755 N PINE GROVE AVE
CHICAGO, IL 60614
Social Worker
2755 N PINE GROVE AVE
CHICAGO, IL 60614

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1619688603, enumerated as an "individual" on December 09, 2022.

The provider is located at 2755 N PINE GROVE AVE CHICAGO, IL 60614 and the phone number is (312) 259-2665.

Social Worker with taxonomy code 1041C0700X and a focus in Clinical.