HAE SEUNG LEE MD INC
NPI 1073296372
Internal Medicine - Endocrinology, Diabetes & Metabolism in Torrance, CA

Q: What is Hae Seung Lee MD Inc's NPI number?

The NPI number for Hae Seung Lee MD Inc is 1073296372. It was assigned to this organization in the NPPES registry on August 11, 2023. The provider is doing business as South Bay Endocrine Specialists.

Q: What is Hae Seung Lee MD Inc's specialty?

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

Active since August 11, 2023

4201 TORRANCE BLVD STE 390, TORRANCE, CA 90503(424) 210-5484(424) 435-0033 Get Directions Write a Review

NPPES record last updated: September 16, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 16, 2025, Aug 11, 2023 (2 updates tracked since 2023).

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About Hae Seung Lee Md Inc NPPES

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

HAE SEUNG LEE MD INC (NPI 1073296372), doing business as South Bay Endocrine Specialists, is a healthcare organization registered as an endocrinology, diabetes & metabolism in Torrance, California and active in the NPI registry since August 2023. The organization lists Hae Seung Lee, Owner, as its authorized official.

NPPES Registry Identity

NPI1073296372

Entity TypeOrganization

Primary Taxonomy207RE0101X

Legal Business NameHAE SEUNG LEE MD INC

Location Address4201 TORRANCE BLVD STE 390Torrance, CA 90503-4541

Mailing Address4201 Torrance Blvd Ste 390Torrance, CA 90503-4541 · (424) 210-5484 · Fax (424) 435-0033

Phone(424) 210-5484

Fax(424) 435-0033

Organization SubpartNo

Authorized OfficialHae Seung LeeOwner · (424) 210-5484

Enumeration DateAugust 11, 2023

Last NPPES UpdateSeptember 16, 20252 updates tracked since enumeration

NPPES CertifiedSeptember 16, 2025

✔ NPI 1073296372 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ 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.

4201 TORRANCE BLVD STE 390, Torrance, CA 90503

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Other Names 1

Doing Business AsSouth Bay Endocrine Specialists

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE 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)

Hae Seung Lee Md Inc 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 Hae Seung Lee MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Hae Seung Lee, M.D.

Endocrinology

NPI 1477971331

4201 TORRANCE BLVD STE 390
Torrance, CA 90503

(424) 210-5484

✔ 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 Hae Seung Lee MD Inc's NPI number?

The NPI number for Hae Seung Lee MD Inc is 1073296372. It was assigned to this organization in the NPPES registry on August 11, 2023. The provider is doing business as South Bay Endocrine Specialists.

Where is Hae Seung Lee MD Inc located?

Hae Seung Lee MD Inc is located at 4201 Torrance Blvd Ste 390, Torrance, CA 90503. The listed phone number is (424) 210-5484.

What is Hae Seung Lee MD Inc's specialty?

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

Is Hae Seung Lee MD Inc enrolled in Medicare?

Yes. Hae Seung Lee MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Hae Seung Lee MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Endocrinology) reassigns their Medicare billing to Hae Seung Lee MD Inc. 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 Hae Seung Lee MD Inc was last updated on September 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.