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

Alexandra Hyejoo Yoon

Child & Adolescent Psychiatry Physician in White Plains, NY · enumerated 2019.

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

National Provider Identifier

1427511237

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Registry record

Entity type Individual (Type 1)

Name Alexandra Hyejoo Yoon

Sex Female

Practice address White Plains, NY, 10605

Phone (888) 694-5700

Enumeration date Apr 9, 2019

Last updated in NPPES Aug 28, 2024

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

Taxonomy & licenses

2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License 33-0978 (NY) 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

Where does Alexandra Yoon practice?

The practice location on file with NPPES is in White Plains, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alexandra Yoon?

The National Provider Identifier (NPI) for Alexandra Yoon is 1427511237, 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 2024-08-28.