Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Hei Sun Leslie Ahn
Pharmacist in Watsonville, CA · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1578095659
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Registry record
Entity type Individual (Type 1)
Name Hei Sun Leslie Ahn
Sex Female
Practice address 1931 Main St, Watsonville, CA, 95076
Phone (831) 768-6700
Enumeration date Mar 29, 2017
Last updated in NPPES Mar 29, 2017
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 Hei Sun Ahn?
Hei Sun Ahn 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.
Other providers at this practice address
Browse all → Victor Salazar Castillo Family Medicine Physician · Watsonville, CA NPI 1619263993 Kristen Smith Psychologist · Watsonville, CA NPI 1861747446 Alexander Friedman Surgery Physician · Watsonville, CA NPI 1205332079 Abraham Vela Family Medicine Physician · Watsonville, CA NPI 1043717283 Mark Mendiola Ambulatory Care Pharmacist · Watsonville, CA NPI 1114492022
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-03-29.