Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Gloria Esther Castillo Diaz
Pharmacist in San Juan, PR · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821098831
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Registry record
Entity type Individual (Type 1)
Name Mrs. Gloria Esther Castillo Diaz
Sex Female
Practice address 19 Calle Acuario, Suite 16, San Juan, PR, 00926
Phone (787) 761-4990
Fax (787) 748-1935
Enumeration date Aug 1, 2005
Last updated in NPPES Jul 8, 2007
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
Where does Gloria Esther Diaz practice?
The practice location on file with NPPES is in San Juan, PR. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gloria Esther Diaz?
The National Provider Identifier (NPI) for Gloria Esther Diaz is 1821098831, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Fernando Padilla-Nazario General Practice Dentistry · San Juan, PR NPI 1306841663 Jessica Ivette Ruiz Pharmacy Technician · San Juan, PR NPI 1902806912 Farmacia Venus Inc Community/Retail Pharmacy · San Juan, PR NPI 1871594531 Aurea Delgado Rodriguez Dermatology Physician · San Juan, PR NPI 1649254657 San Antonio Medical,P.S.C. Primary Care Clinic/Center · San Juan, PR NPI 1912100140 Ramon Rodriguez Maldonado Optician · San Juan, PR NPI 1063871457
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.