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Dr. James Ong, MD

Dr. James Ong, MD

Clinical Cardiac Electrophysiology*
35+ years of experience

Dr. James Ong, MD is a clinical cardiac electrophysiologist in Tarzana, CA and has over 35 years of experience in the medical field. He graduated from University of California in 1989. He is affiliated with medical facilities Los Robles Regional Medical Center and West Hills Hospital and Medical Center. He is accepting new patients and telehealth appointments.

4.9 Star Rating
Based on 216 reviews 4.9 Star Rating (216 reviews)

Practice

18372 Clark St Ste 218 Tarzana, CA 91356
Telehealth available

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(805) 724-0488.

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Dr. Ong's Reviews

Likelihood to recommend Dr. Ong

4.9

216 ratings, 39 with a written review
5 Star
97%
97%
4 Star
2%
2%
3 Star
0%
0%
2 Star
0%
0%
1 Star
1%
1%

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RecentHighestLowestMost Helpful
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Apr 24, 2025
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What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Staff friendliness
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jan 02, 2025
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Yolanda S. – Nov 24, 2024
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Joyce Lederer – Nov 14, 2024
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What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
T Tholke – Oct 08, 2024
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Apr 04, 2023
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Eric B. – Sep 02, 2022
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Richard Tiong – Nov 22, 2021
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
4 people found this helpful
Helpful
Kathy P. – Jun 17, 2020
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
5 people found this helpful
Helpful
Jan 30, 2020
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Helpful
Oct 24, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
5 people found this helpful
Helpful
Oct 24, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
4 people found this helpful
Helpful
Oct 24, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
2 people found this helpful
Helpful
Oct 19, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
3 people found this helpful
Helpful
Oct 19, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Apr 24, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Feb 07, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
4 people found this helpful
Helpful
Jan 31, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Jan 22, 2019
×Post a ResponseAre you Dr. James Ong, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
9 people found this helpful
Helpful
Dec 11, 2018
×Post a ResponseAre you Dr. James Ong, MD?

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About Me

Watch Dr. Ong's Video

care philosophy

Education, education, education - Patients' understanding of their conditions is the most critical first step in their healing process. We emphasize patient teaching in every aspect of our encounters with our patients.

biography

Dr. James Ong, board certified in cardiology and electrophysiology, received his medical education from the University of California San Diego School of Medicine. His residencies were completed at UCLA Medical Center and UCLA Wadsworth VA Medical...read more
  • Clinical Cardiac Electrophysiology

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • University Of California

    Internship Hospital
  • Cedars Sinai Medical Center

    Fellowship Hospital, 1995
  • University Of California

    Residency Hospital, 1992
  • University Of California

    Medical School, 1989
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.
  • English

  • Chinese

  • French

  • Mandarin

  • Mandarin

  • Spanish

  • Relation between ligament of Marshall and adrenergic atrial tachyarrhythmia. Circulation. 1999 Aug 24;100(8):876-83., 1999

  • Website, 2004

  • 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

  • Atrial fibrillation ablation, 2009

  • Focal source hypothesis of atrial fibrillation. J Electrocardiol. 1998;31 Suppl:32-4., 1998

  • End Afib

  • Prevalence of Retrograde Accessory Pathway Conduction During Atrial Fibrillation. Journal of Cardiovascular Electrophysiology 1997;8(4);377-387., 1997

  • The Relation Between Atrial Fibrillation Wavefront Characteristics and Accessory Pathway Conduction. Journal of Clinical Investigation 1995;96:2284-96., 1995

  • Arrhythmias Following Cardioverter-Defibrillator Implantation: Comparison of Epicardial and Transvenous Systems. American Journal of Cardiology 1995;75:137-40., 1995

  • Merck Fellowship, 1995

  • National Institute of Health Research Grant, 1996

  • Solomon Scholar, 1992

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Locations

Practice

Unavail18372 Clark St Ste 218 Tarzana, CA 91356
1

Practice

Unavail32144 Agoura Rd Ste 218 Westlake Village, CA 91361
2