Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. GREGORY K HONG MD
NPI 1578668703
Internal Medicine - Cardiovascular Disease in Los Angeles, CA

Q: What is Gregory Hong's NPI number?

The NPI number for Gregory Hong is 1578668703. It was assigned to this individual provider in the NPPES registry on September 13, 2006.

Q: What is Gregory Hong's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Gregory Hong was last updated on October 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.

Active since September 13, 2006PECOS Enrolled

20.37/100

CMS Quality Rating

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 14, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Gregory K Hong Md NPPES

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

DR. GREGORY K HONG MD (NPI 1578668703) is an individual cardiovascular disease provider in Los Angeles, California, licensed in California (A53990) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Torrance, and is a graduate of Tufts University School Of Medicine (1993).

NPPES Registry Identity

NPI1578668703

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameDR. GREGORY K HONGCredential: MD

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

Sole ProprietorNo

Medical School CMSTufts University School Of MedicineGraduated 1993

Enumeration DateSeptember 13, 2006

Last NPPES UpdateOctober 14, 2026

NPPES CertifiedOctober 14, 2026

✔ NPI 1578668703 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in CA · A53990

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 ↗

Secondary Practice Location 1

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

Other Identifiers 3

Medicaid00A539900CA

Other00A539900CA · Blue Shield

Other096843Champus

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

PECOS PAC ID2163324708

PECOS Enrollment IDI20040123000274

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 Gregory Hong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Gregory K Hong Medical Corporation

Same address

Cardiovascular Disease

520 S VIRGIL AVE, SUITE 501
Los Angeles, CA 90020

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

NPI 1336244565 (213) 381-0700

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 23

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

606 services264 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

467 services184 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

461 services207 patients

Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439

Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.

350 services58 patients

Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes 99458

This service involves analyzing your vital signs, like heart rate and blood pressure, remotely collected over a month. Each additional 20 minutes spent on management refers to extra time spent reviewing, interpreting your data, and planning your care. It's a critical part of ensuring your wellbeing.

346 services71 patients

Management using the results of remote vital sign monitoring per calendar month, first 20 minutes 99457

This service involves reviewing and managing your health data, which is remotely monitored and collected. Your vital signs like heart rate and blood pressure are tracked regularly throughout the month. The first 20 minutes of this data analysis per month is included in this service.

232 services72 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

167 services57 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

165 services144 patients

Ultrasound of heart blood flow, valves and chambers 93320

An ultrasound of your heart, also known as an echocardiogram, is a test that uses sound waves to create detailed images of your heart. It helps doctors check the health of your heart's chambers, valves, and blood flow.

115 services115 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

115 services115 patients

Ultrasound of heart with continuous electrocardiogram (ecg) during rest, exercise and/or drug induced stress with review and report 93351

This procedure involves using ultrasound technology to create images of your heart while you rest, exercise, or undergo drug-induced stress. An ECG continuously monitors your heart's electrical activity. It helps doctors assess heart health and function.

114 services114 patients

Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days 99454

This service involves using devices to remotely track body functions like heart rate or blood pressure. These devices, provided initially, record data daily or send alerts if readings are abnormal. The service is renewed every 30 days.

103 services43 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

89 services73 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

79 services79 patients

Remote monitoring of physiologic parameters, initial set-up and patient education on use of equipment 99453

Remote monitoring of physiologic parameters involves using special equipment to track vital signs like heart rate and blood pressure from a distance. The initial set-up includes installing the device and teaching the patient how to use it correctly for accurate readings.

62 services55 patients

Injection, dobutamine hydrochloride, per 250 mg J1250

Dobutamine hydrochloride is a medication that is injected into the body to improve heart function. It helps the heart pump blood more efficiently, which can be beneficial for conditions like heart failure or after a heart attack. It is administered per 250 mg dosage.

50 services50 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

36 services36 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

36 services36 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

27 services24 patients

Programming of dual lead pacemaker system 93280

Programming of a dual lead pacemaker system is a procedure to adjust your heart's pacemaker settings. This process involves a small device, called a programmer, that communicates with your pacemaker to ensure it's working optimally for your heart's needs.

24 services17 patients

Laser destruction of incompetent vein of arm or leg using imaging guidance 36478

Laser destruction of an incompetent vein is a non-invasive procedure where a laser is used to seal off a malfunctioning vein in the arm or leg. The process is guided by imaging technology to ensure precision and effectiveness. This helps alleviate symptoms like pain and swelling.

23 services17 patients

Telephone medical discussion with physician, 5-10 minutes 99441

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

23 services22 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

19 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90020 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

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

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

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

20.37/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

Improvement Activities

Cost

67.91

Other Providers at the Same Location NPPES 20

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

JAMES J KIM M.D.

Psychiatry & Neurology (Neurology)

520 S VIRGIL AVE, SUITE 307
LOS ANGELES, CA 90020

Los Angeles County (213) 386-2500

PILSOO OH MD

Internal Medicine (Gastroenterology)

520 S VIRGIL AVE, SUITE 202
LOS ANGELES, CA 90020

Los Angeles County (213) 368-0360

DR. INSOO KIM DC

Chiropractor

520 S VIRGIL AVE, #206
LOS ANGELES, CA 90020

Los Angeles County (213) 382-8300

JAMES J KIM MD INC

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

520 S VIRGIL AVE, SUITE 307
LOS ANGELES, CA 90020

Los Angeles County (213) 386-2500

CK SPINAL HEALTH CENTER

Chiropractor

520 S VIRGIL AVE, SUITE# 206
LOS ANGELES, CA 90020

Los Angeles County (213) 382-8300

SOUTHERN CALIFORNIA FOOT AND ANKLE MEDICAL CENTER

Podiatrist (Foot & Ankle Surgery)

520 S VIRGIL AVE, SUITE 105
LOS ANGELES, CA 90020

Los Angeles County (213) 352-1090

MIN YOUNG CHA MD INC

Internal Medicine

520 S VIRGIL AVE, 507
LOS ANGELES, CA 90020

Los Angeles County (213) 480-7770

JAI H LEE MD A PROFESSIONAL CORPORATION

Orthopaedic Surgery

520 S VIRGIL AVE, SUITE 103
LOS ANGELES, CA 90020

Los Angeles County (213) 380-0028

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 Hong's NPI number?

The NPI number for Gregory Hong is 1578668703. It was assigned to this individual provider in the NPPES registry on September 13, 2006.

Where is Gregory Hong located?

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

What is Gregory Hong's specialty?

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

Is Gregory Hong enrolled in Medicare?

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

Which organization bills Medicare for Gregory Hong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Hong reassigns Medicare benefits to Gregory K Hong Medical Corporation (Los Angeles, 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 Gregory Hong'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 Gregory Hong was last updated on October 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.