Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Mateusz Stanislaw Barczyk, PSY.D.

Clinical Psychologist in Niles, IL · enumerated 2008.

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

National Provider Identifier

1053580951

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Registry record

Entity type Individual (Type 1)

Name Dr. Mateusz Stanislaw Barczyk

Credential PSY.D.

Sex Male

Practice address Niles, IL, 60714

Phone (773) 727-6982

Fax (847) 983-0004

Enumeration date Feb 25, 2008

Last updated in NPPES Jan 14, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 071008713 (IL) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

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

Where does Mateusz Barczyk practice?

The practice location on file with NPPES is in Niles, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mateusz Barczyk?

The National Provider Identifier (NPI) for Mateusz Barczyk is 1053580951, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-14.