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MR. JOHN WILLIAMS
NPI 1649533829
Social Worker - Clinical in Chicago, IL

Active since June 21, 2012Opted out of Medicare · through Sep 3, 2027
5209 N CLARK ST, 2ND FLOOR, CHICAGO, IL 60640(773) 575-1792 Get Directions Write a Review

NPPES record last updated: June 21, 2012. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mr. John Williams NPPES

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

MR. JOHN WILLIAMS (NPI 1649533829) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (149.015250) and active in the NPI registry since June 2012. He has opted out of Medicare through September 3, 2027.

NPPES Registry Identity

NPI1649533829
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMR. JOHN WILLIAMS
Location Address5209 N CLARK ST, 2ND FLOORChicago, IL 60640-2101
Mailing Address5415 N Sheridan Rd, Apt. 5308Chicago, IL 60640-1954 · (773) 575-1792
Phone(773) 575-1792
Sole ProprietorYes
Enumeration DateJune 21, 2012
✔ NPI 1649533829 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 · 149.015250
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.
5209 N CLARK ST, Chicago, IL 60640
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Mr. John Williams 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 September 3, 2021 through September 3, 2027.

Opt-Out Effective DateSeptember 3, 2021
Opt-Out In Effect ThroughSeptember 3, 2027Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 2

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

SALLY SUE LINDBERG MA
Counselor (Mental Health)
5209 N CLARK ST, SECOND FLOOR
CHICAGO, IL 60640
Cook County (773) 761-5328
MR. JON CHENCINSKI LCSW
Social Worker (Clinical)
5209 N CLARK ST, 2M
CHICAGO, IL 60640
Cook County (773) 858-8061

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 John Williams's NPI number?

The NPI number for John Williams is 1649533829. It was assigned to this individual provider in the NPPES registry on June 21, 2012.

Where is John Williams located?

John Williams practices at 5209 N Clark St 2nd Floor, Chicago, IL 60640. The listed phone number is (773) 575-1792.

What is John Williams's specialty?

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

Is John Williams enrolled in Medicare?

No. John Williams has opted out of Medicare through September 3, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for John Williams was last updated on June 21, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.