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

Miss Allison Lentulus Stein, MSW, LSW

Social Worker in Winnetka, IL · enumerated 2018 · practices at Counseling Center of the North Shore, Inc..

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

National Provider Identifier

1548736812

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Registry record

Entity type Individual (Type 1)

Name Miss Allison Lentulus Stein

Credential MSW, LSW

Sex Female

Practice address Winnetka, IL, 60093

Phone (847) 446-8060

Enumeration date Oct 15, 2018

Last updated in NPPES Jun 18, 2024

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

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 150.101243 (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

What specialty is Allison Stein?

Allison Stein is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-18.