Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Anna Wiktoria Siepierska, RNFA

Registered Nurse First Assistant in Oak Lawn, IL · enumerated 2018.

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

National Provider Identifier

1356830681

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Anna Wiktoria Siepierska

Credential RNFA

Sex Female

Practice address 4220 W 95th St Ste 1000, Oak Lawn, IL, 60453

Phone (708) 226-3300

Enumeration date May 2, 2018

Last updated in NPPES May 2, 2018

Taxonomy & licenses

163WR0006X Registered Nurse First Assistant Nursing Service Providers · License 041392866 (IL) Primary

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 Anna Siepierska practice?

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

What is the NPI number for Anna Siepierska?

The National Provider Identifier (NPI) for Anna Siepierska is 1356830681, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-02.