A cardiologist in San Diego, CA, Dr. Karl Sun is trained to care for your cardiovascular system & heart, treating conditions such as heart disease.


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Karl Sun MD Inc.  

Accepting New Patients?

Yes, Dr. Karl T. Sun is accepting new patients at this office.


(619) 287-7078


5555 Reservoir Drive, Suite 112, San Diego, CA 92120

Office Hours

  Open Lunch Close
Mon 12:00 - 1:30 pm
Tue 12:00 - 1:30 pm
Wed 12:00 - 1:30 pm
Thu 12:00 - 1:30 pm
Fri 12:00 - 1:30 pm

Office Details

Doctor Specialties Cardiology & Internal Medicine
Accepting New Patients? Yes
Practice Specialty Cardiology
Hospital Affiliations
  • Alvarado Hospital Medical Center
  • Sharp Grossmont Hospital
Languages Spoken Chinese, English, German, Mandarin

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Insurance Accepted  

  • Aetna
  • Blue Shield
  • Cigna
  • Coventry Health Care
  • Health Net
  • Medicare
  • Please contact the office
  • Self-pay
  • United Healthcare
  • Other

About Dr. Sun
Dr. Sun



Dr. Karl Sun graduated from University of Zurich Faculty of Medicine in 1982 before completing a residency in Internal Medicine at University of Texas at San Antonio in San Antonio, TX. He then completed a fellowship in Cardiovascular Disease at University of California, Los Angeles.

Dr. Sun has one office in California where he specializes in Cardiology and Internal Medicine.


Conditions Treated 

  • Atrial Fibrillation
  • Chronic Heart Failure
  • Pulmonary Hypertension

Services & Procedures

  • Chemical Stress Test
  • Cholesterol Management
  • Exercise Stress Testing
  • Holter Monitoring
  • Nuclear Medicine Studies
  • Vascular (Venous) Ultrasound
  • Weight Management

Education & Training  

Medical School


  • University of Texas at San AntonioSan Antonio, TX
    Residency in Internal Medicine


  • University of California, Los AngelesLos Angeles, California
    Fellowship in Cardiovascular Disease


Hospital Affiliations

  • Grossmont Hospital Corporation
  • Alvarado Hospital Medical Center

Languages Spoken  

  • English
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