Dr. James Ong, MD

Dr. James Ong, MD

Clinical Cardiac ElectrophysiologyMaleAge 61

Clinical Cardiac Electrophysiology

Dr. James Ong, MD is a Clinical Cardiac Electrophysiologist in Westlake Village, CA. He is affiliated with medical facilities such as Los Robles Regional Medical Center and West Hills Hospital & Medical Center. His office accepts new patients and telehealth appointments.

Locations

Heart Rhythm Specialists of Southern California

Heart Rhythm Specialists of Southern California32144 Agoura Rd Ste 218 Westlake Village, CA 91361
1
Tarzana18372 Clark St Ste 218 Tarzana, CA 91356
2
  • Call
  • Fax
  • Hours
    • Mon: 9:00am - 5:00pm
    • Tue: 9:00am - 5:00pm
    • Wed: 9:00am - 5:00pm
    • Thu: 9:00am - 5:00pm
    • Fri: 9:00am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions

At a Glance

  • Explains Conditions WellPatients said this doctor explains conditions well. See reviews
  • Offers TelehealthThis provider offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top HospitalPatient Safety Excellence Award™ See hospitals

More Clinical Cardiac Electrophysiologists at Los Robles Regional Medical Center

Dr. Ong's Reviews

Likelihood to recommend Dr. Ong

5.0

Based on 209 ratings

5 Star
98%
98%
4 Star
1%
1%
3 Star
0%
0%
2 Star
0%
0%
1 Star
1%
1%
What went well
No reviews yet
What could be improved
No reviews yet

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RecentHighestLowestMost Helpful
Reply
Exceptional!
I have been a patient of Dr. Ong's for nearly 2 years. I found him through this website when searching for a electrophysiologist for my wife a couple of years prior. I was impressed with his rating and reviews. I recently had a cardiac ablation procedure to treat AFib and I am VERY pleased with the outcome. Although I live >40 miles from Dr. Ong's office, he is worth and I would (and have) recommended him to others.
What went well
  • Appointment scheduling
  • Staff friendliness
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Eric B. – Sep 02, 2022
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Reply
I flew from Malaysia to seek experienced EP for my SVT condition in November 2021. Dr Ong acted quickly to squeeze me into his packed schedule at short notice. Catheter ablation was accomplished within a week of evaluation/consultation. Another of my concern was my high calcium score (2000+). Dr. Ong recommended a nuclear cardiac stress test instead of proceeding directly to invasive angiogram. I achieved the twin objectives of treating SVT and determining the functionality of my coronary arteries about 10 days, a wonderful journey of healing!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Richard Tiong – Nov 22, 2021
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Reply
I had a very bad and dangerous case of Afib. It took two ablations to find all of the bad nerve sites, but he did it! (More than one ablation is common about 40% of the time.) No Afib for 2 1/2 years and perfectly normal nuclear stress tests and EKGs. Lucky a friend told me about Dr. Ong! It could have ended much differently.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Helpful
Kathy P. – Jun 17, 2020
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Reply
Everyone in the office is very friendly and courteous . I like coming here.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
5 people found this helpful
Helpful
Jan 30, 2020
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Reply
Zoe is great to work with
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Helpful
Oct 24, 2019
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Reply
Experienced Dr we can trust and always recommend to all my relatives. He has a magic hand since I came to his office I feel younger and healthier
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
5 people found this helpful
Helpful
Oct 24, 2019
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Reply
I have trust in Dr. Ong's skills
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Helpful
Oct 24, 2019
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Reply
I have the utmost confidence and trust in Dr. Ong. I wouldn't see anyone else.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
2 people found this helpful
Helpful
Oct 19, 2019
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Reply
Dr.Ong is a miracle worker. His level of expertise is awesome. He s wonderfully caring, dedicated, and talented. I owe my improved health and vitality to Dr. Ong. He saved my life. Thank you again Dr. Ong
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
2 people found this helpful
Helpful
Oct 19, 2019
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Reply
WONDERFUL DOCTOR, I FEEL WELL CARED FOR.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Apr 24, 2019
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Reply
THE OFFICE STAFF IS KIND, PERSONABLE, PLEASANT AND FRIENDLY AT ALL TIMES
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
2 people found this helpful
Helpful
Feb 07, 2019
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Reply
GREAT DOCTOR & HUMAN BEING!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Helpful
Jan 31, 2019
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Reply
FEEL GREAT AFTER PROCEDURE THANK YOU!!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
2 people found this helpful
Helpful
Jan 22, 2019
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Reply
Dr James Ong IS the Doctor you want to go to if you have A Fib! Hands down the BEST! He took an extra 2 hours to make sure he hit every area of my heart that was causing issues with Rhythm, I have complete confidence in Dr Ong and his team at West Hills Hospital was truly amazing! I feel like I have a second chance at life after having a 6 hour ablation. Dr Ong takes the time to explain and answers your questions in a manner that is comforting and concise. I highly recommend Dr Ong. CA IN WH
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
9 people found this helpful
Helpful
Dec 11, 2018
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Reply
EXCELLENT TREATMENT
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Nov 29, 2018
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Reply
He saved my life a couple times!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Nov 01, 2018
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Reply
Love Dr. Ong & his help , they go above and beyond, always with a smile on their face!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Nov 01, 2018
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Reply
Dr. Ong you are steller, you personify what bedside manner is- kind, patient & compassionate . We Love You!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Oct 31, 2018
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Reply
CHRISTINA & ZOE ARE FABULOUS AND VERY PROFESSIONAL. I HIGHLY RECOMMEND THIS OUTSTANDING TEAM
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Oct 24, 2018
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Reply
VERY PLEASED AND SATISFIED WITH MY TREATMENT BY DR. OMG AND HIS STAFF
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Sep 26, 2018
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Experience and Background Checks

Experience
Background

Background Check

No malpractice claims found for California
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Experience Check

Check Dr. Ong's experience treating your condition or procedure

Dr. Ong's Top Procedures and Conditions

Treatment Frequency
Atrial Fibrillation
very high
very high

Treatment Frequency

Dr. Ong treats Atrial Fibrillation more than 99% of his peers

Dr. Ong treats this condition more than 99% of his peers

Rating Includes other areas of care:

  • Familial Atrial Fibrillation
Heart Disease
very high
very high

Treatment Frequency

Dr. Ong treats Heart Disease more than 98% of his peers

Dr. Ong treats this condition more than 98% of his peers

Cardioversion, Elective
very high
very high

Treatment Frequency

Dr. Ong performs Cardioversion, Elective more than 98% of his peers

Dr. Ong performs this procedure more than 98% of his peers

Dr. Ong's conditions and procedures:

  • Ablation
  • Ablation for Treatment of Atrial Fibrillation
  • Ablation for Treatment of Cardiac Arrhythmias
  • Adult Congenital Heart Disease
  • Angina and Acute Coronary Syndrome
  • Angiography
  • Aortic Aneurysm
  • Aortic Diseases
  • Aortic Ectasia
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Fibrillation Surgery
  • Atrial Flutter
  • Automatic Implantable Cardioverter Defibrillator (ICD) Implantation
  • Brugada Syndrome
  • Cardiac Catheterization (incl. Coronary Angiography)
  • Cardiac Imaging
  • Cardiac Resynchronization Therapy
  • Cardiomegaly
  • Cardiomyopathy
  • Cardioversion
  • Cardioversion, Elective
  • Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
  • Carotid Artery Disease
  • Congestive Heart Failure
  • Coronary Angioplasty, Atherectomy and Stent
  • Coronary Artery Disease (CAD)
  • Defibrillator Implantation
  • Ebstein's Anomaly
  • Echocardiography
  • Electrophysiological Study
  • Endocarditis
  • Heart Attack (Acute Myocardial Infarction)
  • Heart Block
  • Heart Disease
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Heart and Chronic Kidney Disease
  • Hypertensive Heart Disease
  • Hypotension
  • Long QT Syndrome
  • Mitral Valve Disease
  • Nonthoracotomy ICD Implantation
  • Pacemaker Insertion or Replacement
  • Paroxysmal Atrial Tachycardia
  • Paroxysmal Supraventricular Tachycardia
  • Pericardial Disease
  • Pulmonary Hypertension
  • Pulmonary Valve Disease
  • Radiofrequency Catheter Ablation
  • Removal or Revision of Pacemaker or Cardioverter and-or Defibrillator
  • Septal Defect
  • Sudden Arrhythmia Death Syndrome
  • Supraventricular Tachycardia
  • Syncope
  • Tilt Table Testing
  • Tilt Testing or Cardiac Event Monitors
  • Tricuspid Valve Disease
  • Ultrasound, Cardiac
  • Ventricular Fibrillation
  • Wolff-Parkinson-White Pattern

Insurance Check

Search for your insurance provider

Dr. Ong accepts

Accepted insurance can change. Please double-check when making an appointment.

(818) 722-9749

Dr. Ong accepts the following insurance:

Aetna
Blue Cross Blue Shield
Blue Cross Blue Shield of California
Priority Select HMO
Blue Shield of California
Access Plus Savenet
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
Cigna
Medicare
Motion Picture Industry Health Plan
Providence Health Plans
UnitedHealthCare
United Healthcare

About Me

Care Philosophy

Education, education, education - Patients' understanding of their conditions is the most critical first step in their healing process. We emphasize patient...Read more

Biography

A board-certified Cardiac Electrophysiologist, Dr. James Ong has been performing complex arrhythmia ablation since 1993. He is currently certified...Read more

Specialties

  • Clinical Cardiac Electrophysiology

Board Certifications

  • Cardiovascular Disease
  • Internal Medicine

Education

1995
Cedars-Sinai Cardiac Electrophysiology Fellowship|Cedars-Sinai Medical Center Cardiology Fellowship
Fellowship Hospital
1990
UCLA/West La Va Medical Center|University Of California
Internship Hospital

Languages

  • English
  • French
  • Mandarin
  • Mandarin
  • Spanish

Awards

  • Healthgrades Honor Roll
  • Solomon Scholar, 1992
  • Merck Fellowship, 1995
  • National Institute of Health Research Grant, 1996

Media & Publications

  • Prevalence of Retrograde Accessory Pathway Conduction During Atrial Fibrillation. Journal of Cardiovascular Electrophysiology 1997;8(4);377-387., 1997
  • Arrhythmias Following Cardioverter-Defibrillator Implantation: Comparison of Epicardial and Transvenous Systems. American Journal of Cardiology 1995;75:137-40., 1995
  • Focal source hypothesis of atrial fibrillation. J Electrocardiol. 1998;31 Suppl:32-4., 1998
  • Pulmonary veins and ligament of Marshall as sources of rapid activations in a canine model of sustained atrial fibrillation. Circulation. 2001 Feb 27;103(8):1157-63., 2001
  • The Relation Between Atrial Fibrillation Wavefront Characteristics and Accessory Pathway Conduction. Journal of Clinical Investigation 1995;96:2284-96., 1995
  • Relation between ligament of Marshall and adrenergic atrial tachyarrhythmia. Circulation. 1999 Aug 24;100(8):876-83., 1999
  • End Afib,
  • Atrial fibrillation ablation, 2009
  • Website, 2004

Frequently Asked Questions

What is the best way to schedule an appointment with Dr. James Ong, MD?

New patients may call (818) 722-9747 to make an appointment.

Does Dr. James Ong, MD accept any insurance plans?

A list of accepted insurance providers is available on the Healthgrades insurance check. It is always a good idea to verify your insurance when making an appointment.

Does Dr. James Ong, MD accept new patients?

New patients are generally accepted by Dr. James Ong, MD on Healthgrades. To arrange an appointment, call the number on Dr. Ong's profile.

What conditions does Dr. James Ong, MD treat?

Dr. Ong frequently treats the following conditions: Atrial Fibrillation, Heart Disease, and Adult Congenital Heart Disease. See more on Healthgrades.

What is Dr. James Ong, MD's office address?

Dr. Ong's office is located at 32144 Agoura Rd Ste 218, Westlake Village, CA 91361. You can find other locations and directions on Healthgrades.

What languages is Dr. James Ong, MD fluent in?

Dr. Ong is able to speak Spanish, Taiwanese, and French. View profile to see all.

Is Dr. James Ong, MD able to provide telehealth services?

Dr. Ong provides telehealth services. Please contact the office to determine whether you are eligible.

Is Dr. James Ong, MD affiliated with any hospitals?

Dr. James Ong, MD is affiliated with Los Robles Regional Medical Center and West Hills Hospital & Medical Center.

Is Dr. James Ong, MD a board-certified professional?

Yes, Dr. James Ong, MD holds board certifications in Cardiovascular Disease and Internal Medicine.

Does Dr. James Ong, MD receive good ratings from patients?

There is a star rating of 5/5 for Dr. James Ong, MD. Patients say that they trusted the provider's decisions and the provider explained conditions well. See all patient feedback on Healthgrades.

Affiliated Hospitals

Dr. Ong is affiliated with the following hospitals. Select a hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Los Robles Regional Medical Center

Thousand Oaks, CA

74% Patients that would definitely recommend, 4% higher than the national average

20 Awards Received

Award Highlight: State Ranking Award - Surgical Care™ (2023)

West Hills Hospital & Medical Center

West Hills, CA

62% Patients that would definitely recommend, 8% lower than the national average

4 Awards Received

Encino Hospital Medical Center

Encino, CA

62% Patients that would definitely recommend, 8% lower than the national average

3 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2022)

Providence Cedars-Sinai Tarzana Medical Center

Tarzana, CA

67% Patients that would definitely recommend, 3% lower than the national average

2 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2020)

Sherman Oaks Hospital

Sherman Oaks, CA

50% Patients that would definitely recommend, 20% lower than the national average

5 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2022)