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

Grazyna Gabriela Petersen, LCSW, CADC

Clinical Social Worker in Lisle, IL · enumerated 2019.

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

National Provider Identifier

1457814360

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Grazyna Gabriela Petersen

Credential LCSW, CADC

Sex Female

Practice address Lisle, IL, 60532

Phone (773) 739-0992

Fax (773) 733-4119

Enumeration date Apr 8, 2019

Last updated in NPPES Dec 15, 2020

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 33287 (IL) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 149.021092 (IL) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

What is the NPI number for Grazyna Petersen?

The National Provider Identifier (NPI) for Grazyna Petersen is 1457814360, a Type 1 (individual) record in the CMS NPPES registry.

Where does Grazyna Petersen practice?

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

Other providers at this practice address

Browse all →

Megan Kirkpatrick Social Worker · Lisle, IL NPI 1497472013

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-15.