Dr. Derek Wei-Feng Leong, MD

  • Los Angeles, CA
  • Cardiologist
NPI1194102921PAC ID0143576009
Medicare services, 2019
80
Part D claims, 2024
886
Publications
11
Hospital affiliations
2
Industry payments
$2,091
Practice address
4867 Sunset Blvd, Los Angeles, CA 90027
Practice phone
Call (323) 783-4011
Professional email
Get professional email
Personal email
Get personal email
Mobile number
Get mobile number
Social profiles

Primary practice

Kaiser Permanente Los Angeles Medical Center

Hospital · Los Angeles, California

See all 5 affiliations

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Dr. Derek Wei-Feng Leong is a cardiologist in Los Angeles, California

Dr. Leong practices at Kaiser Permanente Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente.

Dr. Leong's NPI, 1194102921, was assigned on April 30, 2015. Dr. Leong graduated from Georgetown University School Of Medicine in 2015. Dr. Leong holds California license A146264.

NPI and contact details
Medicare PAC ID
0143576009
NPI enumeration date
April 30, 2015
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(323) 783-4011
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
37
Medical school graduation
2015

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Derek Wei-Feng Leong practices at Kaiser Permanente Los Angeles Medical Center in Los Angeles, California

Dr. Leong's primary practice is Kaiser Permanente Los Angeles Medical Center, at 4867 Sunset Blvd, Los Angeles, CA 90027 in Los Angeles County. The practice phone is (323) 783-4011.

Source: Dmand AI Affiliation Data

Dr. Derek Wei-Feng Leong is affiliated with 3 sites of care and 2 medical groups

Dr. Leong's primary practice is Kaiser Permanente Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente. Dr. Leong is also affiliated with Cedars-Sinai Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Leong to 1 more group practice or clinic and 1 medical group, each named with a free account.

See all 5 affiliations for Dr. Leong

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Derek Wei-Feng Leong's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leong practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Kaiser Permanente Los Angeles Medical CenterAvailable with a free account
+2 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Derek Wei-Feng Leong is one of 2,375 cardiologists in California

Cardiovascular disease is Dr. Leong's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Leong is board certified in cardiovascular disease by the American Board of Internal Medicine. Dr. Leong is licensed in California.

Specialties and state licenses

  • Cardiovascular disease, CaliforniaPrimaryLicense A146264 · 2016 to 2026 · taxonomy 207RC0000X

Cardiologists near Dr. Leong

Counts of cardiologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Derek Wei-Feng Leong billed Medicare for 80 services in 2019

CMS data shows 80 Medicare services from Dr. Leong across 4 procedure codes in 2019. Medicare paid $8,173 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 201980
Paid by Medicare$8,173
Procedure codes4

Dr. Leong's Medicare services by type, 2018 to 2019

  • 2018
  • 2019
Office and hospital visits
2018: 552019: 8045%

Dr. Leong compared with the California median for cardiologists, 2019

  • Dr. Leong
  • California median
Medicare services
80vs 1,56095% below
Part D claims
773vs 1,41045% below

Medians across 2,237 cardiologists in California with Dmand AI profiles that report each measure.

Dr. Leong's most billed Medicare procedure codes, 2019

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Leong

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Derek Wei-Feng Leong's patients have a median age of 70

Across all payers, Dmand AI patient panel data puts Dr. Leong's median patient age at 70, with 47% women.

Dr. Leong's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 70

Patient panel by sex, all payers

  • Women47%
  • Men52%

Source: Dmand AI Patient Panel Data

Dr. Derek Wei-Feng Leong wrote 886 Medicare Part D claims in 2024

In 2024, Dr. Leong wrote 886 Medicare Part D claims for 320 patients. 78% of them were for generic drugs. CMS names the drug for 773 of them, across 25 drugs with 11 or more claims each, at $606,421 in total drug cost. In 2023, CMS named 370 claims across 11 drugs.

Part D claims, 2024886
Drugs named by CMS25
Total drug cost$606,421
Part D patients320

Dr. Leong's Part D claims by kind of drug, 2024

  • Generic691 claims78%
  • Brand-name195 claims22%

Dr. Leong's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 3702024: 773109%

Drugs named by CMS: 25 in 2024, 11 in 2023.

See all prescribing by Dr. Leong

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

How Dr. Derek Wei-Feng Leong takes part in Medicare

Dr. Leong accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Coronary angioplasty and stenting: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Dr. Derek Wei-Feng Leong has 11 publications on record

Dmand AI links 11 papers to Dr. Leong, published from 2019 to 2022. 2022 was the busiest year, with 2. The most frequent topics are Anticoagulants. Dr. Leong has published most often in CMAJ. Dr. Leong's most frequent co-authors are Daniel S. Berman, MD, Tarun Chakravarty, MD and Joseph E. Ebinger.

Papers11
Years published2019 to 2022

Dr. Leong's papers by year, 2019 to 2022

Topics Dr. Leong writes about most

  • Anticoagulants

Dr. Leong's most frequent co-authors

Recent publications by Dr. Leong

See all 11 publications and co-authors

See who Dr. Leong researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Leong works with, so you can find a warm path to the right cardiologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Derek Wei-Feng Leong received $2,091 in industry payments from 2022 to 2025

CMS Open Payments shows 18 general payments to Dr. Leong from 8 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 94% of the total. Boston Scientific Corporation paid the most, $769.

General payments to Dr. Leong by program year, 2022 to 2025

General payments to Dr. Leong by kind, 2022 to 2025

$2.1Kin total
  • Food and beverage$1,96694%
  • Grants$1256%

Companies that paid Dr. Leong the most, 2022 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Leong

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Derek Wei-Feng Leong graduated from Georgetown University School Of Medicine

Dr. Leong graduated from Georgetown University School Of Medicine in 2015.

  1. Medical schoolGeorgetown University School Of Medicine
  2. Board certified in cardiovascular diseaseAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine
  4. Board certified in interventional cardiologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Derek Wei-Feng Leong accepts plans from 8 insurance carriers

Dr. Leong is in network with 8 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.

  • Elevance
  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Kaiser Permanente
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • CMS Medicare

Plan types Dr. Leong accepts, by number of carriers

  1. Medicare7
  2. PPO6
  3. HMO4
  4. POS4
  5. EPO3
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Derek Wei-Feng Leong's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel Data
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Derek Wei-Feng Leong

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Derek Wei-Feng Leong's NPI number?

Dr. Derek Wei-Feng Leong's NPI number is 1194102921. It was assigned on April 30, 2015, and it is active in the NPI Registry.

What kind of doctor is Dr. Derek Wei-Feng Leong?

Dr. Derek Wei-Feng Leong is a cardiologist in Los Angeles, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).

Where does Dr. Derek Wei-Feng Leong practice?

Dr. Leong practices at 4867 Sunset Blvd, Los Angeles, CA 90027. Dr. Leong's primary practice is Kaiser Permanente Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente. Dmand AI also links Dr. Leong to 1 group practice or clinic and 1 medical group.

What is Dr. Derek Wei-Feng Leong's office phone number?

The practice phone on file for Dr. Leong is (323) 783-4011.

What is Dr. Derek Wei-Feng Leong's medical license number?

Dr. Leong holds California license A146264.

Which hospitals is Dr. Derek Wei-Feng Leong affiliated with?

Dr. Leong practices at Kaiser Permanente Los Angeles Medical Center in Los Angeles, California. Dr. Leong is also affiliated with Cedars-Sinai Medical Center.

What medical group is Dr. Derek Wei-Feng Leong part of?

Dr. Leong is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Leong to 1 more medical group.

Does Dr. Derek Wei-Feng Leong accept Medicare?

Yes. CMS data shows Dr. Leong billed Medicare for 80 services in 2019, and Dr. Leong accepts Medicare assignment.

Is Dr. Derek Wei-Feng Leong board certified?

Yes. Dr. Leong is board certified in cardiovascular disease by the American Board of Internal Medicine.

What services does Dr. Derek Wei-Feng Leong bill to Medicare?

In 2019, Dr. Leong's most billed Medicare services were hospital inpatient care (99223), office visit, established patient (99213) and office visit, established patient (99214).

Show 7 more questionsShow fewer questions

Where did Dr. Derek Wei-Feng Leong go to medical school?

Dr. Leong graduated from Georgetown University School Of Medicine in 2015.

What drugs does Dr. Derek Wei-Feng Leong prescribe most?

In 2024 Medicare Part D data, Dr. Leong's most prescribed drugs by claims were Metoprolol Tartrate, Furosemide and Bisoprolol Fumarate.

Has Dr. Derek Wei-Feng Leong received payments from drug or device companies?

CMS Open Payments shows $2,091 in general payments to Dr. Leong from 8 companies from 2022 to 2025. The largest total came from Boston Scientific Corporation.

How long has Dr. Derek Wei-Feng Leong been practicing?

Dr. Leong graduated from medical school in 2015, 11 years ago.

Does Dr. Derek Wei-Feng Leong do research?

Dmand AI links 11 publications to Dr. Leong, published from 2019 to 2022.

Who does Dr. Derek Wei-Feng Leong publish with?

Dr. Leong's most frequent co-authors are Daniel S. Berman, MD (1 shared paper), Tarun Chakravarty, MD (1 shared paper) and Joseph E. Ebinger (1 shared paper).

What insurance does Dr. Derek Wei-Feng Leong accept?

Dr. Leong is in network with 8 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.

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