Dr. Mary Koumas, DO
Dr. Mary Koumas, DO is a family medicine physician in Lake Forest, CA and has over 45 years of experience in the medical field. She graduated from A. T. Still University Kirksville College of Osteopathic Medicine in 1978. She is affiliated with MemorialCare Saddleback Medical Center. She is accepting new patients and telehealth appointments.
Practice
24401 Muirlands Blvd Ste A Lake Forest, CA 92630Compare with other Family Medicine Physicians
Compare Dr. Koumas with our nearby Family Medicine Physicians at UCI Medical Center.
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Dr. Koumas' Reviews
Likelihood to recommend Dr. Koumas
| 5 star | 55% | 55% |
| 4 star | 9% | 9% |
| 3 star | 5% | 5% |
| 2 star | 5% | 5% |
| 1 star | 27% | 27% |
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- Office environment
- Listened & answered questions
- Explained conditions well
- Staff friendliness
- Appointment wasn't rushed
- Trusted the provider's decisions
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How was your experience with Dr. Koumas?Overall Patient Satisfaction
Likelihood of recommending Dr. Koumas to family and friends is 3.590909 out of 5
About Me
care philosophy
I am proud to be part of the Optum family of primary care doctors, specialists, and care teams focused on providing care for people ages 65+. At Optum, my team and I help you reach your personal health goals. We focus on your total well-being while...read moreFamily Medicine
Geriatric Medicine
*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
A. T. Still University Kirksville College Of Osteopathic Medicine
Medical School, 1978
Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.
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Affiliated Hospitals
- Recipient of 25
hospital awardsAmerica's 250 Best Hospitals Award™ (2025, 2024, 2023)
Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications
View all awardsPatient Safety Excellence Award™ (2025, 2024)
Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications
View all patient feedbackHow patients felt about the care they received at this hospital.
86%Patients said they were given information about recovering at home2% higher than the national average
77%Patients said that doctors always listened to them and explained things well1% higher than the national average
Compare with other Family Medicine Physicians
Compare Dr. Koumas with our nearby Family Medicine Physicians at UCI Medical Center.