Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Patrick E Castro
Pharmacist in Danville, CA · enumerated 2026.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1710834353
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Registry record
Entity type Individual (Type 1)
Name Patrick E Castro
Sex Male
Practice address 158 Channi Loop, Danville, CA, 94506
Phone (510) 548-8777
Enumeration date Mar 12, 2026
Last updated in NPPES Mar 12, 2026
Taxonomy & licenses
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 Patrick Castro?
Patrick Castro is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-12.