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HAE SEUNG LEE M.D.
NPI 1477971331
Internal Medicine - Endocrinology, Diabetes & Metabolism in Torrance, CA

Active since March 28, 2014PECOS EnrolledAccepts Medicare Assignment
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 18, 2026.

Record update history: Sep 16, 2025, Aug 11, 2023, Jul 11, 2016 (3 updates tracked since 2016).

About Hae Seung Lee M.d. NPPES

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

HAE SEUNG LEE M.D. (NPI 1477971331) is an individual endocrinology, diabetes & metabolism provider in Torrance, California, licensed in California (171672) and active in the NPI registry since March 2014. She is enrolled in Medicare PECOS and is a graduate of Other (2003).

NPPES Registry Identity

NPI1477971331
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameHAE SEUNG LEECredential: M.D.
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
Sole ProprietorNo
Medical School CMSOtherGraduated 2003
Enumeration DateMarch 28, 2014
Last NPPES UpdateSeptember 16, 20253 updates tracked since enumeration
NPPES CertifiedSeptember 16, 2025
✔ NPI 1477971331 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 · 171672
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 Medicine · Obesity MedicineTaxonomy 207RB0002X · License 171672 (CA)
4201 TORRANCE BLVD STE 390, Torrance, CA 90503
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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

Hae Seung 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 ID4789965088
PECOS Enrollment IDI20231026000613
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 Reassignment

Medicare enrollment records show Hae Seung Lee reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Hae Seung Lee MD Inc
Same address
Endocrinology, Diabetes & Metabolism
4201 TORRANCE BLVD STE 390
Torrance, CA 90503
  • Reassigned Medicare billing, California enrollment
NPI 1073296372 (424) 210-5484

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
451 services58 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
49 services43 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90503 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 4

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

HAE SEUNG LEE MD INC
Internal Medicine (Endocrinology, Diabetes & Metabolism)
4201 TORRANCE BLVD STE 390
TORRANCE, CA 90503
Los Angeles County (424) 210-5484
PRATIVA RAJBHANDARI MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
4201 TORRANCE BLVD STE 390
TORRANCE, CA 90503
Los Angeles County (424) 210-5484
PRATIVA RAJBHANDARI MD INC
Internal Medicine (Endocrinology, Diabetes & Metabolism)
4201 TORRANCE BLVD STE 390
TORRANCE, CA 90503
Los Angeles County (424) 210-5484
LESLEY J LUK MD INC
Otolaryngology
4201 TORRANCE BLVD STE 390
TORRANCE, CA 90503
Los Angeles County (310) 540-0018

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's NPI number?

The NPI number for Hae Seung Lee is 1477971331. It was assigned to this individual provider in the NPPES registry on March 28, 2014.

Where is Hae Seung Lee located?

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

What is Hae Seung Lee'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 enrolled in Medicare?

Yes. Hae Seung 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 organization bills Medicare for Hae Seung Lee's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hae Seung Lee reassigns Medicare benefits to Hae Seung Lee MD Inc (Torrance, CA). The 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 Hae Seung 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 Hae Seung Lee 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.