Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Peace of Mind Psychological Services Inc

Clinical Psychologist in Warrenville, IL · enumerated 2020 · authorized official Olesia Shalayska, Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1427661685

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Registry record

Entity type Organization (Type 2)

Legal business name Peace of Mind Psychological Services Inc

Practice address 4320 Winfield Rd Ste 200, Warrenville, IL, 60555

Phone (630) 465-9030

Fax (630) 686-5445

Enumeration date Aug 27, 2020

Last updated in NPPES Apr 15, 2026

Taxonomy & classification

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers Primary

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers Secondary

103TF0000X Family Psychologist Behavioral Health & Social Service Providers Secondary

103TP2701X Group Psychotherapy Psychologist Behavioral Health & Social Service Providers Secondary

Authorized official

Name Olesia Shalayska

Title Owner

Phone (630) 686-8875

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Peace of Mind Psychological Services Inc?

Peace of Mind Psychological Services Inc is registered in NPPES as a Clinical Psychologist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-15.