Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Rebecca Castro-Arias
Audiologist in Wilmington, DE · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1700457389
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Registry record
Entity type Individual (Type 1)
Name Rebecca Castro-Arias
Sex Female
Practice address 2205 Silverside Rd Ste 4, Wilmington, DE, 19810
Phone (302) 529-9103
Enumeration date Jul 6, 2021
Last updated in NPPES Jul 6, 2021
Taxonomy & licenses
231H00000X Audiologist Speech, Language and Hearing Service Providers · License O2-0010273 (DE) 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.
Frequently asked questions
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.
What specialty is Rebecca Castro-Arias?
Rebecca Castro-Arias is registered in NPPES with the primary taxonomy of Audiologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-06.