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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. YOON S. LEE PSY.D.
NPI 1366734477
Clinical Neuropsychologist in Irvine, CA

Active since May 07, 2011Opted out of Medicare · through Jul 1, 2027
4605 BARRANCA PKWY STE 101D, IRVINE, CA 92604(949) 825-8100 Get Directions Write a Review

NPPES record last updated: July 28, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Yoon S. Lee Psy.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. YOON S. LEE PSY.D. (NPI 1366734477) is an individual clinical neuropsychologist in Irvine, California, licensed in California (PSY23596) and active in the NPI registry since May 2011. She has opted out of Medicare through July 1, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1366734477
Entity TypeIndividualFemale
Primary Taxonomy103G00000X
Provider Legal NameDR. YOON S. LEECredential: PSY.D.
Location Address4605 BARRANCA PKWY STE 101DIrvine, CA 92604-1726
Mailing Address4605 Barranca Pkwy Ste 101dIrvine, CA 92604-1726 · (949) 825-8100
Phone(949) 825-8100
Sole ProprietorYes
Enumeration DateMay 7, 2011
Last NPPES UpdateJuly 28, 2026
NPPES CertifiedJuly 28, 2026
✔ NPI 1366734477 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers
Taxonomy Code103G00000X
License✔ Licensed in CA · PSY23596
Definition
A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PSY23596 (CA)
4605 BARRANCA PKWY STE 101D, Irvine, CA 92604
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Dr. Yoon S. Lee Psy.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 1, 2017 through July 1, 2027.

Opt-Out Effective DateJuly 1, 2017
Opt-Out In Effect ThroughJuly 1, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Yoon Lee's NPI number?

The NPI number for Yoon Lee is 1366734477. It was assigned to this individual provider in the NPPES registry on May 7, 2011.

Where is Yoon Lee located?

Yoon Lee practices at 4605 Barranca Pkwy Ste 101D, Irvine, CA 92604. The listed phone number is (949) 825-8100.

What is Yoon Lee's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Is Yoon Lee enrolled in Medicare?

No. Yoon Lee has opted out of Medicare through July 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Yoon Lee was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.