PEACE OF MIND PSYCHOLOGICAL SERVICES INC
NPI 1427661685
Psychologist - Clinical in Warrenville, IL

Q: What is Peace Of Mind Psychological Services Inc's specialty?

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

Active since August 27, 2020

4320 WINFIELD RD STE 200, WARRENVILLE, IL 60555(630) 465-9030(630) 686-5445 Get Directions Write a Review

NPPES record last updated: April 15, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 15, 2026, Feb 9, 2024, Aug 18, 2023 and 1 more (4 updates tracked since 2020).

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About Peace Of Mind Psychological Services Inc NPPES

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

PEACE OF MIND PSYCHOLOGICAL SERVICES INC (NPI 1427661685) is a healthcare organization registered as a clinical in Warrenville, Illinois and active in the NPI registry since August 2020. The organization maintains a secondary practice location in Palos Heights and lists Olesia Shalayska, Owner, as its authorized official.

NPPES Registry Identity

NPI1427661685

Entity TypeOrganization

Primary Taxonomy103TC0700X

Legal Business NamePEACE OF MIND PSYCHOLOGICAL SERVICES INC

Location Address4320 WINFIELD RD STE 200Warrenville, IL 60555-4023

Mailing Address4320 Winfield Rd Ste 200Warrenville, IL 60555-4023 · (630) 465-9030 · Fax (630) 686-5445

Phone(630) 465-9030

Fax(630) 686-5445

Organization SubpartNo

Authorized OfficialOlesia ShalayskaOwner · (630) 686-8875

Enumeration DateAugust 27, 2020

Last NPPES UpdateApril 15, 20264 updates tracked since enumeration

NPPES CertifiedApril 15, 2026

✔ NPI 1427661685 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 5

★ 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.

Also ListedPsychologist · Cognitive & BehavioralTaxonomy 103TB0200X

Also ListedPsychologist · CounselingTaxonomy 103TC1900X

Also ListedPsychologist · FamilyTaxonomy 103TF0000X

Also ListedPsychologist · Group PsychotherapyTaxonomy 103TP2701X

4320 WINFIELD RD STE 200, Warrenville, IL 60555

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Secondary Practice Location 1

Location 17110 W 127th St Ste 150Palos Heights, IL 60463-1579 · Phone (630) 686-8875 · Fax (630) 686-5445

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Peace Of Mind Psychological Services Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Peace Of Mind Psychological Services Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Olesia Shalayska

Clinical Psychologist

NPI 1558816371

4320 WINFIELD RD STE 200
Warrenville, IL 60555

(630) 686-8875

✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Peace Of Mind Psychological Services Inc's NPI number?

The NPI number for Peace Of Mind Psychological Services Inc is 1427661685. It was assigned to this organization in the NPPES registry on August 27, 2020.

Where is Peace Of Mind Psychological Services Inc located?

Peace Of Mind Psychological Services Inc is located at 4320 Winfield Rd Ste 200, Warrenville, IL 60555. The listed phone number is (630) 465-9030.

What is Peace Of Mind Psychological Services Inc's specialty?

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

Is Peace Of Mind Psychological Services Inc enrolled in Medicare?

Yes. Peace Of Mind Psychological Services Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Peace Of Mind Psychological Services Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Psychologist) reassigns their Medicare billing to Peace Of Mind Psychological Services Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Peace Of Mind Psychological Services Inc was last updated on April 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.