NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Yi Yi Sun

Pharmacist in Fontana, CA · enumerated 2021 · practices at Walgreen Co.

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

National Provider Identifier

1750975876

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Yi Yi Sun
Sex Female
Practice address 16145 Sierra Lakes Pkwy, Fontana, CA, 92336
Phone (909) 356-9167
Enumeration date Mar 1, 2021
Last updated in NPPES Mar 1, 2021

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 54760 (CA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Yi Yi Sun?
The National Provider Identifier (NPI) for Yi Yi Sun is 1750975876, a Type 1 (individual) record in the CMS NPPES registry.
Where does Yi Yi Sun practice?
The practice location on file with NPPES is in Fontana, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-01.