Alexandra Castro

Alexandra Castro is a Behavior Analyst provider (Behavior Analyst) practicing in Freeport, NY, registered in the NPPES registry with NPI 1558139105 since 2023.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1558139105
Entity type	Individual (Type 1)
Name	Alexandra Castro
Sex	Female
Practice address	Freeport, NY, 11520
Phone	5166681815
Enumeration date	2023-12-13
Last updated in NPPES	2023-12-13

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103K00000X	Behavior Analyst	Primary	—	—

Copy-ready billing details

Provider: Alexandra Castro
NPI: 1558139105
Taxonomy: 103K00000X (Behavior Analyst)
Address: Freeport, NY, 11520

Verify this record

Cross-check NPI 1558139105 against the authoritative CMS record: view Alexandra Castro on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

Where does Alexandra Castro practice?

The practice location on file with NPPES is in Freeport, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alexandra Castro?

The National Provider Identifier (NPI) for Alexandra Castro is 1558139105, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-12-13.