Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Kolessar, PSY.D.

Clinical Neuropsychologist in Bridgeton, MO · enumerated 2009.

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

National Provider Identifier

1134458201

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Registry record

Entity type Individual (Type 1)

Name Michael Kolessar

Credential PSY.D.

Sex Male

Practice address 12380 De Paul Dr, Bridgeton, MO, 63044

Phone (314) 447-9705

Enumeration date Dec 18, 2009

Last updated in NPPES Oct 3, 2013

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers 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.

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Frequently asked questions

Where does Michael Kolessar practice?

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

What is the NPI number for Michael Kolessar?

The National Provider Identifier (NPI) for Michael Kolessar is 1134458201, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-03.