Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Jeff D. Kazmierczak, Psy.D., P.C.

Clinical Neuropsychologist in Bourbonnais, IL · enumerated 2012 · authorized official Jeffrey Kazmierczak, Psychologist.

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

National Provider Identifier

1316203896

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Registry record

Entity type Organization (Type 2)

Legal business name Jeff D. Kazmierczak, Psy.D., P.C.

Practice address 19 Heritage Dr, Suite 211, Bourbonnais, IL, 60914

Phone (815) 933-8760

Fax (815) 933-9061

Enumeration date Apr 9, 2012

Last updated in NPPES Nov 15, 2012

Taxonomy & classification

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers Primary

103TA0700X Adult Development & Aging Psychologist Behavioral Health & Social Service Providers Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers Secondary

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers Secondary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers Secondary

103TR0400X Rehabilitation Psychologist Behavioral Health & Social Service Providers · License 071008293 (IL) Secondary

Authorized official

Name Jeffrey Kazmierczak

Title Psychologist

Phone (773) 412-2778

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.

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Frequently asked questions

Where is Jeff D. Kazmierczak, Psy.D., P.C. located?

The practice location on file with NPPES is in Bourbonnais, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2012-11-15. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-15.