Individual provider Active NPI

Leah Wolff, LCSW

  • Clinical Social Worker
  • Winnetka, IL
National Provider Identifier
1366870651
Registry record updated Mar 18, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Social WorkerTaxonomy code 1041C0700X
License
59609 Issued in CA
Practice address
345 Auburn Ave
Winnetka, IL 60093-3603
Phone
(213) 590-4915
NPI assigned
Oct 23, 2013
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 18, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Social Worker 1041C0700X 149030133 IL
Clinical Social Worker 1041C0700X 59609 CA Primary

Addresses

Primary practice location

345 Auburn Ave
Winnetka, IL 60093-3603

Mailing address

345 Auburn Ave
Winnetka, IL 60093-3603
Phone (323) 783-2600

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

State licenses

LicenseStateTypeSpecialty
149030133ILMDClinical Social Worker

Practice roles

OrganizationSpecialtyStatusNew patients
Leah Wolff Pscychotherapy Inc Clinical Current Accepting new patients

Organizations & group practices 1

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1382486400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773792000000",
    "number": "1366870651",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "345 AUBURN AVE",
            "city": "WINNETKA",
            "state": "IL",
            "postal_code": "600933603",
            "telephone_number": "323-783-2600"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "345 AUBURN AVE",
            "city": "WINNETKA",
            "state": "IL",
            "postal_code": "600933603",
            "telephone_number": "213-590-4915"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WOLFF",
        "first_name": "LEAH",
        "name_prefix": "Ms.",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2013-10-23",
        "last_updated": "2026-03-18",
        "certification_date": "2026-03-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "IL",
            "license": "149030133",
            "primary": false
        },
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CA",
            "license": "59609",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Winnetka, IL

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 18, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.