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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Eddy A. Castillo

Specialist in Fairfield, CT · enumerated 2005.

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

National Provider Identifier

1225020134

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Registry record

Entity type Individual (Type 1)
Name Dr. Eddy A. Castillo
Sex Male
Practice address 425 Post Rd, Fairfield, CT, 06824
Phone (203) 292-9000
Fax (203) 292-1700
Enumeration date Aug 17, 2005
Last updated in NPPES Oct 30, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 039515 (CT) 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 Eddy Castillo?
Eddy Castillo is registered in NPPES with the primary taxonomy of Specialist. 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 2007-10-30.