Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Hea Lan Yoon, R. N. CNS

Oncology Clinical Nurse Specialist in Los Angeles, CA · enumerated 2010.

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

National Provider Identifier

1285958256

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mrs. Hea Lan Yoon

Credential R. N. CNS

Sex Female

Practice address 11301 Wilshire Blvd, Los Angeles, CA, 90073

Phone (310) 478-3711

Fax (310) 268-4913

Enumeration date Mar 19, 2010

Last updated in NPPES Mar 19, 2010

Taxonomy & licenses

364SX0200X Oncology Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 3236 (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

How do I verify Hea Yoon's NPI record?

Cross-check NPI 1285958256 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1285958256 active?

Yes, as of the latest NPPES snapshot, NPI 1285958256 is active (record last updated 2010-03-19).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-19.