NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Yeonshin Regina Paik

Pharmacist in Naperville, IL · enumerated 2011 · practices at Walgreen Co.

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

National Provider Identifier

1821375429

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Registry record

Entity type Individual (Type 1)
Name Mrs. Yeonshin Regina Paik
Sex Female
Practice address Naperville, IL, 60565
Phone (630) 778-7645
Enumeration date Nov 9, 2011
Last updated in NPPES Oct 3, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 051.040403 (IL) 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.

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Frequently asked questions

Where does Yeonshin Paik practice?
The practice location on file with NPPES is in Naperville, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Yeonshin Paik?
The National Provider Identifier (NPI) for Yeonshin Paik is 1821375429, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-03.