HYUNJU LEE MD A PROFESSIONAL CORPORATION
NPI 1245103126
Internal Medicine - Endocrinology, Diabetes & Metabolism in La Palma, CA

Q: What is Hyunju Lee MD A Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Active since September 26, 2025

7851 WALKER ST STE 103, LA PALMA, CA 90623(714) 422-0440(714) 494-4210 Get Directions Write a Review

NPPES record last updated: August 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 13, 2026, Jul 10, 2026, May 7, 2026 and 2 more (5 updates tracked since 2025).

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About Hyunju Lee Md A Professional Corporation NPPES

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

HYUNJU LEE MD A PROFESSIONAL CORPORATION (NPI 1245103126) is a healthcare organization registered as an endocrinology, diabetes & metabolism in La Palma, California and active in the NPI registry since September 2025. The organization maintains a secondary practice location in Garden Grove and lists Hyunju Lee, Physician, as its authorized official.

NPPES Registry Identity

NPI1245103126

Entity TypeOrganization

Primary Taxonomy207RE0101X

Legal Business NameHYUNJU LEE MD A PROFESSIONAL CORPORATION

Location Address7851 WALKER ST STE 103La Palma, CA 90623-1734

Mailing Address12372 Garden Grove Blvd Ste BGarden Grove, CA 92843-1805 · (714) 583-8569 · Fax (714) 661-5371

Phone(714) 422-0440

Fax(714) 494-4210

Organization SubpartNo

Authorized OfficialHyunju LeePhysician · (714) 583-8569

Enumeration DateSeptember 26, 2025

Last NPPES UpdateAugust 13, 20265 updates tracked since enumeration

NPPES CertifiedAugust 13, 2026

✔ NPI 1245103126 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

Also ListedInternal MedicineTaxonomy 207R00000X

7851 WALKER ST STE 103, La Palma, CA 90623

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Secondary Practice Location 1

Location 112372 Garden Grove Blvd Ste BGarden Grove, CA 92843-1805 · Phone (714) 583-8569 · Fax (714) 661-5371

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hyunju Lee Md A Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Hyunju Lee MD A Professional Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Hyunju Lee, M.D.

Internal Medicine

NPI 1629483102

7851 WALKER ST STE 103
La Palma, CA 90623

(714) 422-0440

✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Hyunju Lee MD A Professional Corporation's NPI number?

The NPI number for Hyunju Lee MD A Professional Corporation is 1245103126. It was assigned to this organization in the NPPES registry on September 26, 2025.

Where is Hyunju Lee MD A Professional Corporation located?

Hyunju Lee MD A Professional Corporation is located at 7851 Walker St Ste 103, La Palma, CA 90623. The listed phone number is (714) 422-0440.

What is Hyunju Lee MD A Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Hyunju Lee MD A Professional Corporation enrolled in Medicare?

Yes. Hyunju Lee MD A Professional Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Hyunju Lee MD A Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Hyunju Lee MD A Professional Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Hyunju Lee MD A Professional Corporation was last updated on August 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.