Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Alexander David Horelick, LMSW, CASAC

Social Worker in Harrison, NY · enumerated 2014.

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

National Provider Identifier

1538568613

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Registry record

Entity type Individual (Type 1)

Name Mr. Alexander David Horelick

Credential LMSW, CASAC

Sex Male

Practice address 275 North St, Harrison, NY, 10528

Phone (914) 925-5309

Enumeration date Aug 14, 2014

Last updated in NPPES May 20, 2015

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 092901 (NY) Primary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 30240 (NY) Secondary

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

Is NPI 1538568613 active?

Yes, as of the latest NPPES snapshot, NPI 1538568613 is active (record last updated 2015-05-20).

How do I verify Alexander Horelick's NPI record?

Cross-check NPI 1538568613 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-05-20.