1. Home
  2. Directory
  3. California
  4. Los Angeles
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

GREGORY K HONG MEDICAL CORPORATION
NPI 1336244565
Internal Medicine - Cardiovascular Disease in Los Angeles, CA

Active since September 13, 2006
520 S VIRGIL AVE, SUITE 501, LOS ANGELES, CA 90020(213) 381-0700(213) 381-8700 Get Directions Write a Review

NPPES record last updated: October 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gregory K Hong Medical Corporation NPPES

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

GREGORY K HONG MEDICAL CORPORATION (NPI 1336244565), doing business as Good Heart Cardiology Medical Associates, is a healthcare organization registered as a cardiovascular disease in Los Angeles, California and active in the NPI registry since September 2006. The organization maintains a secondary practice location in Torrance and lists Gregory K Hong, President, as its authorized official.

NPPES Registry Identity

NPI1336244565
Entity TypeOrganization
Primary Taxonomy207RC0000X
Legal Business NameGREGORY K HONG MEDICAL CORPORATION
Location Address520 S VIRGIL AVE, SUITE 501Los Angeles, CA 90020-1416
Mailing Address520 S Virgil Ave, Suite 501Los Angeles, CA 90020-1416 · (213) 381-0700 · Fax (213) 381-8700
Phone(213) 381-0700
Fax(213) 381-8700
Organization SubpartNo
Authorized OfficialGregory K HongPresident · (213) 381-0700
Enumeration DateSeptember 13, 2006
Last NPPES UpdateOctober 13, 2026
NPPES CertifiedOctober 13, 2026
✔ NPI 1336244565 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
520 S VIRGIL AVE, Los Angeles, CA 90020
Open in Google Maps ↗

Other Names 1

Doing Business AsGood Heart Cardiology Medical Associates

Secondary Practice Location 1

Location 12055 Torrance Blvd Ste 1Torrance, CA 90501-2642 · Phone (424) 358-1136

Other Identifiers 1

Medicaid00A539900CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory K Hong Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Gregory K Hong Medical Corporation, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (4)

Gregory Hong, MD
Cardiovascular Disease (Cardiology)
NPI 1578668703
520 S VIRGIL AVE SUITE 501
Los Angeles, CA 90020
(213) 381-0700
✔ PECOSSame address
Kien Quang Vuu, MD
Diagnostic Radiology
NPI 1477755635
1200 S BRAND BLVD STE 188
Glendale, CA 91204
(626) 673-5436
✔ PECOS✔ Accepts Medicare7.1 mi
Basil Younes, D.O.
Interventional Cardiology
NPI 1669674933
4201 TORRANCE BLVD. SUITE 420
Torrance, CA 90503
(310) 540-1953
✔ PECOS✔ Accepts Medicare16 mi
Sendhil Krishnan, MD, FACC
Internal Medicine
NPI 1376693325
1234 W CHAPMAN AVE STE 101
Orange, CA 92868
(714) 984-0548
✔ PECOS✔ Accepts Medicare31 mi

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 Gregory K Hong Medical Corporation's NPI number?

The NPI number for Gregory K Hong Medical Corporation is 1336244565. It was assigned to this organization in the NPPES registry on September 13, 2006. The provider is doing business as Good Heart Cardiology Medical Associates.

Where is Gregory K Hong Medical Corporation located?

Gregory K Hong Medical Corporation is located at 520 S Virgil Ave Suite 501, Los Angeles, CA 90020. The listed phone number is (213) 381-0700.

What is Gregory K Hong Medical Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Gregory K Hong Medical Corporation enrolled in Medicare?

Yes. Gregory K Hong Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gregory K Hong Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians reassign their Medicare billing to Gregory K Hong Medical Corporation, in Cardiovascular Disease (Cardiology), Diagnostic Radiology, Internal Medicine and Interventional Cardiology. 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. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Gregory K Hong Medical Corporation was last updated on October 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.