Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Leah Petrak, LSW
Social Worker in Northbrook, IL · enumerated 2026.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285547489
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Registry record
Entity type Individual (Type 1)
Name Leah Petrak
Credential LSW
Sex Female
Practice address 3300 Dundee Rd, Northbrook, IL, 60062
Phone (773) 448-1565
Enumeration date Sep 28, 2026
Last updated in NPPES Sep 28, 2026
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 150.129963 (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.
Frequently asked questions
Where does Leah Petrak practice?
The practice location on file with NPPES is in Northbrook, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Leah Petrak?
The National Provider Identifier (NPI) for Leah Petrak is 1285547489, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-09-28.