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

DR. JANET KATHERINE WILLER PH.D.
NPI 1982686531
Psychologist - Clinical in Chicago, IL

Q: What is Janet Willer's NPI number?

The NPI number for Janet Willer is 1982686531. It was assigned to this individual provider in the NPPES registry on November 18, 2005.

Q: What is Janet Willer's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: Is Janet Willer enrolled in Medicare?

No. Janet Willer has opted out of Medicare through May 29, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

Q: When was this NPI record last updated?

The NPPES record for Janet Willer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 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.

Active since November 18, 2005Opted out of Medicare · through May 29, 2027

4753 N BROADWAY ST, SUITE 530, CHICAGO, IL 60640(774) 859-1822(773) 275-2252 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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About Dr. Janet Katherine Willer Ph.d. NPPES

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

DR. JANET KATHERINE WILLER PH.D. (NPI 1982686531) is an individual clinical provider in Chicago, Illinois and active in the NPI registry since November 2005. She has opted out of Medicare through May 29, 2027.

NPPES Registry Identity

NPI1982686531

Entity TypeIndividualFemale

Primary Taxonomy103TC0700X

Provider Legal NameDR. JANET KATHERINE WILLERCredential: PH.D.

Location Address4753 N BROADWAY ST, SUITE 530Chicago, IL 60640-5266

Mailing Address4753 N Broadway St, Suite 530Chicago, IL 60640-5266 · (774) 859-1822 · Fax (773) 275-2252

Phone(774) 859-1822

Fax(773) 275-2252

Sole ProprietorNo

Enumeration DateNovember 18, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1982686531 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

4753 N BROADWAY 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

Dr. Janet Katherine Willer Ph.d. 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 May 29, 2023 through May 29, 2027.

Opt-Out Effective DateMay 29, 2023

Opt-Out In Effect ThroughMay 29, 2027Opt-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.

KAMRAN NASEEM MALIK QMHP

Clinic/Center (Mental Health (Including Community Mental Health Center))

4753 N BROADWAY ST
CHICAGO, IL 60640

Cook County (773) 293-8430

TRANSFORMATIVE PSYCHOTHERAPY LLC

Social Worker (Clinical)

4753 N BROADWAY ST, 830
CHICAGO, IL 60640

Cook County (773) 484-5186

MS. SUSANA MONTENEGRO MCLELLAN LCPC, NCC, CADC

Counselor (Professional)

4753 N BROADWAY ST, SUITE 720
CHICAGO, IL 60640

Cook County (773) 899-3245

DR. KRISTINA EUNJOO CHUNG-HELLINGA D.C.

Chiropractor

4753 N BROADWAY ST, SUITE 101
CHICAGO, IL 60640

Cook County (773) 271-8284

MR. DENNIS DELFOSSE LCPC

Counselor (Professional)

4753 N BROADWAY ST, SUITE 900, 910, 925
CHICAGO, IL 60640

Cook County (773) 989-2780

JOANNA VERGOTH LCSW

Social Worker (Clinical)

4753 N BROADWAY ST, SUITE 509
CHICAGO, IL 60640

Cook County (917) 796-8213

JOANNE MARWIL, PSY.D. AND ASSOCIATES

Psychologist (Clinical)

4753 N BROADWAY ST, SUITE 826
CHICAGO, IL 60640

Cook County (773) 317-3949

MS. SUSAN M. MULLEN LCSW, CADC

Social Worker (Clinical)

4753 N BROADWAY ST, SUITE 608
CHICAGO, IL 60640

Cook County (847) 638-4234

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 Janet Willer's NPI number?

The NPI number for Janet Willer is 1982686531. It was assigned to this individual provider in the NPPES registry on November 18, 2005.

Where is Janet Willer located?

Janet Willer practices at 4753 N Broadway St Suite 530, Chicago, IL 60640. The listed phone number is (774) 859-1822.

What is Janet Willer's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Janet Willer enrolled in Medicare?

No. Janet Willer has opted out of Medicare through May 29, 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 Janet Willer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 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.