Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diane Petersen, LCSW

Clinical Social Worker in Grayslake, IL · enumerated 2013 · practices at Community Youth Network, Inc.

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

National Provider Identifier

1306187117

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Registry record

Entity type Individual (Type 1)

Name Diane Petersen

Credential LCSW

Sex Female

Practice address 18640 W Il Route 120, Grayslake, IL, 60030

Phone (847) 548-6000

Fax (847) 548-6040

Enumeration date Mar 5, 2013

Last updated in NPPES Mar 5, 2013

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 149.005019 (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

Where does Diane Petersen practice?

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

What is the NPI number for Diane Petersen?

The National Provider Identifier (NPI) for Diane Petersen is 1306187117, 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 2013-03-05.