Dr. James Ong, MD

Dr. James Ong, MD

Clinical Cardiac ElectrophysiologyMale

Accepting new patients
Telehealth services available

Make an Appointment

(818) 722-9749

Dr. James Ong, MD is a Clinical Cardiac Electrophysiologist in Tarzana, CA. He is affiliated with medical facilities such as West Hills Hospital & Medical Center and Los Robles Regional Medical Center. He is accepting new patients and has indicated that he accepts telehealth appointments. Be sure to call ahead with Dr. Ong to book an appointment.

Office Hours

18372 Clark St Ste 218 Tarzana, CA 91356

Mon

Open Now
to
5 pm

Tue

9 am
to
5 pm

Wed

9 am
to
5 pm

Thu

9 am
to
5 pm

Fri

9 am
to
5 pm

Sat

Office
closed

Sun

Office
closed
Call to Book

Locations

Heart Rhythm Specialists of Southern California

Tarzana18372 Clark St Ste 218 Tarzana, CA 91356
1
  • 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
Heart Rhythm Specialists of Southern California32144 Agoura Rd Ste 218 Westlake Village, CA 91361
2

At a Glance

  • Explains Conditions Well Patients said this doctor explains conditions well. See reviews
  • Offers Telehealth This provider offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital America’s 100 Best Hospitals for Cardiac Care Award™ See hospitals

Dr. Ong's Reviews

Likelihood to recommend Dr. Ong

5.0

Based on 207 ratings

5 Stars
98.06763285024155%
(203)
4 Stars
0.966183574879227%
(2)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
0.966183574879227%
(2)
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Leave a review

How likely are you to recommend
Dr. Ong
(Select your rating)
What went well
No reviews yet
What could be improved
No reviews yet
RecentHighestLowestMost Helpful
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
3 people found this helpful
Helpful
Kathy P. – Jun 17, 2020
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
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
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
4 people found this helpful
Helpful
Oct 24, 2019
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
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
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
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
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
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
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
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
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
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
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
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
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
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
GREAT DOCTOR! HAVE COMPLETE CONFIDENCE IN HIS DECISIONS
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
Jun 30, 2018
he is the best ! did my oblation and am all good thanks to him!
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
ron in simi valley, ca – May 12, 2018

Leave a review

How was your experience with Dr. Ong?

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
  • Angina and Acute Coronary Syndrome
  • Angiography
  • Aortic Aneurysm
  • Aortic Ectasia
  • Aortic Valve Disease
  • Arrhythmias
  • Arrhythmogenic Right Ventricular Dysplasia, Familial, 1
  • 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
  • Congenital Heart 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
  • Mobitz, Type 2, Heart Block
  • 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
  • Second Degree Heart Block
  • Septal Defect
  • Sudden Arrhythmia Death Syndrome
  • Supraventricular Tachycardia
  • Syncope
  • Third Degree Heart Block
  • 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) 839-2608

Dr. Ong accepts the following insurance:

Aetna
Aetna HMO
Anthem
Advantage-CA HMO
Advantage-CA PPO
Balanced (Prudent Buyer)-CA PPO
Blue Cross (CACare) - Individual-CA HMO
Blue Cross (CACare) - Large Group-CA HMO
Blue Cross (CACare) - Small Group-CA HMO
Blue Cross (Prudent Buyer) - Individual-CA PPO
Blue Cross (Prudent Buyer) - Large Group-CA PPO
Blue Cross (Prudent Buyer) - Small Group-CA PPO
Blue Cross (Prudent Buyer) - Student Health-CA PPO
Blue Cross-CA HMO-POS
Bronze (Prudent Buyer PPO/ Small Grp)-CA PPO
Bronze EPO (Prudent Buyer / Small Grp)-CA PPO
Bronze EPO (Prudent Buyer EPO/ Small Grp)-CA
Bronze w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Dignity Health Custom Advantage-CA HMO
Dignity Health EPO / PPO-CA
Dignity Health PHC EPO & HDP/HSA-CA
Dignity Health Ventura EPO/PPO-CA
EPO-CA
Gold (CaliforniaCare HMO/ Small Grp) HMO
Gold (Prudent Buyer PPO/ Small Grp)-CA PPO
Gold Advantage-CA PPO
Gold EPO (Prudent Buyer / Small Grp)-CA PPO
Gold EPO (Prudent Buyer EPO/ Small Grp)-CA
Gold Priority Select-CA HMO
Gold Select (Select / Small Grp)-CA HMO
Lumenos Plans-CA PPO
Major Risk Medical Insurance Program (MRMIP) - Prudent Buyer-CA PPO
MemorialCare Custom-CA PPO
National (BlueCard Basic) PPO
National (BlueCard) PPO
PERS Choice / PERSCare Providers-CA PPO
PERS Traditional-CA HMO
Platinum (CaliforniaCare HMO/ Small Grp) HMO
Platinum (Prudent Buyer PPO/ Small Grp)-CA PPO
Platinum Priority Select-CA HMO
Platinum Select (Select / Small Grp)-CA HMO
Priority Select-CA HMO
Select Plus-CA HMO
Select-CA HMO
Silver (CaliforniaCare HMO/ Small Grp) HMO
Silver (Prudent Buyer PPO/ Small Grp)-CA PPO
Silver Advantage-CA PPO
Silver EPO (Prudent Buyer EPO/ Small Grp)-CA
Silver EPO w/ H.S.A (Prudent Buyer/Small Grp)-CA PPO
Silver Priority Select-CA HMO
Silver Select (Select / Small Grp)-CA HMO
Silver w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Tenet Network-CA PPO
Traditional
Traditional PPO
UC Care-CA PPO
UC CORE-CA PPO
UC Health Savings Plan-CA
UC High Option Supplement to Medicare-CA
UC Medicare with Prescription Drugs-CA PPO
UC Medicare without Prescription Drugs-CA PPO
UC Resident and Fellows-CA PPO
UCSHIP-CA PPO
USC Plan (Two Tiered Network)-CA HMO
Blue Cross Blue Shield
Blue Card PPO
Blue Cross Blue Shield of California
Advantage Preferred DirectAccess Plus PPO
Priority Select HMO
Blue Shield of California
Access Plus Savenet
Local Access Plus HMO
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
Cigna
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

Dr. James Ong, board certified in cardiology and electrophysiology, received his medical education from the University of California San Diego School of...Read more

Specialties

  • Clinical Cardiac Electrophysiology

Board Certifications

  • Cardiovascular Disease
  • Clinical Cardiac Electrophysiology

Education

Cedars Sinai Medical Center | Cedars Sinai Medical Center
Fellowship Hospital
University Of California
Residency Hospital
University Of California
Internship Hospital
University Of California
Medical School
1984
U.C. Berkeley
Undergraduate School
,

Languages

  • English
  • Chinese
  • French
  • Mandarin
  • Mandarin
  • Spanish

Awards

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

Media & Publications

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

Frequently Asked Questions

How can I make an appointment with Dr. James Ong, MD?

Call (818) 722-9749 to make an appointment as a new patient. Click here for more information.

Does Dr. James Ong, MD offer telehealth services?

Dr. Ong has indicated that they offer telehealth. Contact the office to check for eligibility for your needs.

Is Dr. James Ong, MD accepting new patients?

Dr. James Ong, MD generally accepts new patients on Healthgrades. You can see Dr. Ong's profile to make an appointment.

Does Dr. James Ong, MD accept my insurance?

Use the Healthgrades insurance check to verify if Dr. Ong accepts your insurance.

What are Dr. James Ong, MD's top areas of care?

Dr. Ong frequently treats Atrial Fibrillation, Heart Disease, and Cardioversion, Elective. See all procedures and conditions Dr. Ong treats.

Where is Dr. James Ong, MD's office located?

Dr. Ong's office is located at 18372 Clark St Ste 218, Tarzana, CA 91356. Find other locations and directions on Healthgrades.

What languages does Dr. James Ong, MD speak?

Dr. Ong speaks Spanish, Taiwanese, and Chinese. View profile to see all.

Affiliated Hospitals

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

Learn more about how Healthgrades measuresHospital Quality.

West Hills Hospital & Medical Center

West Hills, CA

66% Patient Experience Rating, 3% lower than the national average

4 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2019)

Los Robles Regional Medical Center

Thousand Oaks, CA

72% Patient Experience Rating, 3% higher than the national average

10 Awards Received

Encino Hospital Medical Center

Encino, CA

69% Patient Experience Rating, Equal to the national average

3 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2021)

Providence Cedars-Sinai Tarzana Medical Center

Tarzana, CA

65% Patient Experience Rating, 4% lower than the national average

14 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2020)

Sherman Oaks Hospital

Sherman Oaks, CA

64% Patient Experience Rating, 5% lower than the national average

8 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2021)