Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alvaro Castellar

Behavior Analyst in Ozone Park, NY · enumerated 2023.

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

National Provider Identifier

1548036668

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Registry record

Entity type Individual (Type 1)

Name Alvaro Castellar

Sex Male

Practice address 10450 102nd St Apt 2e, Ozone Park, NY, 11417

Phone (929) 354-1829

Enumeration date Nov 29, 2023

Last updated in NPPES Nov 29, 2023

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers 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.

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Frequently asked questions

What specialty is Alvaro Castellar?

Alvaro Castellar is registered in NPPES with the primary taxonomy of Behavior Analyst. 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 2023-11-29.