HYUNJU LEE M.D.
NPI 1629483102
Internal Medicine - Endocrinology, Diabetes & Metabolism in La Palma, CA

Q: What is Hyunju Lee's NPI number?

The NPI number for Hyunju Lee is 1629483102. It was assigned to this individual provider in the NPPES registry on June 24, 2014.

Q: What is Hyunju Lee's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Hyunju Lee 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.

Active since June 24, 2014PECOS EnrolledAccepts Medicare Assignment

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, Feb 5, 2026 and 2 more (5 updates tracked since 2025).

On this page

About Hyunju Lee M.d. NPPES

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

HYUNJU LEE M.D. (NPI 1629483102) is an individual endocrinology, diabetes & metabolism provider in La Palma, California, licensed in California (A146630) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, maintains a secondary practice location in Garden Grove, and is a graduate of Other (2005).

NPPES Registry Identity

NPI1629483102

Entity TypeIndividualFemale

Primary Taxonomy207RE0101X

Provider Legal NameHYUNJU LEECredential: M.D.

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

Sole ProprietorYes

Medical School CMSOtherGraduated 2005

Enumeration DateJune 24, 2014

Last NPPES UpdateAugust 13, 20265 updates tracked since enumeration

NPPES CertifiedAugust 13, 2026

✔ NPI 1629483102 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

License✔ Licensed in CA · A146630

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 · License 260347 (MA)

7851 WALKER ST STE 103, La Palma, CA 90623

Open in Google Maps ↗

Secondary Practice Location 1

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Hyunju Lee M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9032470422

PECOS Enrollment IDI20250219003627

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Hyunju Lee reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hyunju Lee MD A Professional Corporation

Same address

Endocrinology, Diabetes & Metabolism

7851 WALKER ST STE 103
La Palma, CA 90623

Reassigned Medicare billing, California enrollment

NPI 1245103126 (714) 422-0440

Pih Health Physicians

2.7 mi

Cardiovascular Disease

10601 WALKER STREET, SUITE 100
Cypress, CA 90630

Reassigned Medicare billing, California enrollment
840 clinicians in this Medicare group

NPI 1982360772 (714) 656-2140

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90623 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KARIS MEDICAL GROUP LA PALMA

Clinic/Center

7851 WALKER ST STE 103
LA PALMA, CA 90623

Orange County (714) 345-3023

HYUNJU LEE MD A PROFESSIONAL CORPORATION

Internal Medicine (Endocrinology, Diabetes & Metabolism)

7851 WALKER ST STE 103
LA PALMA, CA 90623

Orange County (714) 422-0440

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's NPI number?

The NPI number for Hyunju Lee is 1629483102. It was assigned to this individual provider in the NPPES registry on June 24, 2014.

Where is Hyunju Lee located?

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

What is Hyunju Lee's specialty?

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

Is Hyunju Lee enrolled in Medicare?

Yes. Hyunju Lee is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Hyunju Lee's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hyunju Lee reassigns Medicare benefits to 2 organizations: Hyunju Lee MD A Professional Corporation (La Palma, CA) and Pih Health Physicians (Cypress, CA). Each 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 Hyunju Lee's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Hyunju Lee 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.