Ruth Karunananthan, M.D.

Internal Medicine

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8:00 AM - 5:00 PM


8:00 AM - 5:00 PM


8:00 AM - 5:00 PM


8:00 AM - 5:00 PM


8:00 AM - 5:00 PM





New Patients Accepted!


English, Tamil

Education + Accreditation:

  • Medical: Godfrey Huggins School of Medicine
  • Residency: University of Southern California
New Patients Accepted!


Dr. Karunananthan, Lakeside Community Healthcare and Regal Medical Group share one common purpose: To better every life we touch through the way we care. Dr. Karunananthan proudly serves West Covina and surrounding communities. She is a board-certified internist with more than 24 years of experience treating multi-generational patients. Her focus areas include adult preventive medicine and managing chronic conditions such as high cholesterol and hypertension. Dr. Karunananthan’s patients know her best for being compassionate, a good listener and applying best practices with up-to-date methods to find the best treatments possible. When not attending to patients, she enjoys traveling and spending time with her family. Through her close collaboration with Lakeside Community Healthcare and Regal Medical Group, Dr. Karunananthan has access to the best hospitals, specialists, labs, radiology facilities and support programs available. As a dedicated champion of health, she represents the Lakeside and Regal standards of accessible and compassionate healthcare.

Visit Ruth Karunananthan, M.D. at:

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Lakeside Community Healthcare

Lakeside Community Healthcare contracts with a large network of doctors to give you the best options to manage your health. We also provide best in class care at our Lakeside staff model doctor's offices, most locations offering one-stop primary and specialty care for a convenient, seamless experience.

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News & Events

We have free health education classes and events happening in your neighborhood, right at your fingertips! With HealthyWay, you can take steps to keep happy and healthy!

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Patient Resources

Get the most out of your doctors appointment! Make sure to bring your health plan membership card, list of current medicines you are taking, and written questions that you may have about your health.

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