Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alejandro Castillo

Dentist in North Adams, MA · enumerated 2022.

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

National Provider Identifier

1689321176

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Registry record

Entity type Individual (Type 1)

Name Alejandro Castillo

Sex Male

Practice address 77 Hospital Ave Ste 102, North Adams, MA, 01247

Phone (413) 346-4242

Enumeration date Mar 4, 2022

Last updated in NPPES Mar 4, 2022

Taxonomy & licenses

122300000X Dentist Dental Providers · License DL15086 (MA) 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 Alejandro Castillo?

Alejandro Castillo is registered in NPPES with the primary taxonomy of Dentist. 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 2022-03-04.