Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katarzyna Olbrycht-Ciszewski, ST

Speech-Language Pathologist in Chicago, IL · enumerated 2007.

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

National Provider Identifier

1659496321

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Registry record

Entity type Individual (Type 1)

Name Katarzyna Olbrycht-Ciszewski

Credential ST

Sex Female

Practice address 1467 N Elston Ave Ste 103, Chicago, IL, 60642

Phone (773) 443-7454

Enumeration date Mar 20, 2007

Last updated in NPPES Sep 18, 2023

Taxonomy & licenses

2355S0801X Speech-Language Assistant Speech, Language and Hearing Service Providers · License 217000126 (IL) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 242005550 (IL) Primary

Other identifiers

Identifier	Type	State	Issuer
103034	Medicaid	IL	-

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 Katarzyna Olbrycht-Ciszewski practice?

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

What is the NPI number for Katarzyna Olbrycht-Ciszewski?

The National Provider Identifier (NPI) for Katarzyna Olbrycht-Ciszewski is 1659496321, 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 2023-09-18.