Dr. John Koumas, DO
Dr. John Koumas, DO is a family medicine physician in Lake Forest, CA and has over 35 years of experience in the medical field. He graduated from Western University of Health Sciences in 1987. He is affiliated with medical facilities MemorialCare Saddleback Medical Center and Emanate Health Inter-Community Hospital. He 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 | 60% | 60% |
| 4 star | 0% | 0% |
| 3 star | 20% | 20% |
| 2 star | 20% | 20% |
| 1 star | 0% | 0% |
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- I felt respected
- Appointment scheduling
- Listened & answered questions
- Explained conditions well
- Staff friendliness
- Appointment wasn't rushed
- Trusted the provider's decisions
- Wait times
- Office environment
- Appointment scheduling
- Listened & answered questions
- Explained conditions well
- Staff friendliness
- Trusted the provider's decisions
- Wait times
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How was your experience with Dr. Koumas?Overall Patient Satisfaction
Likelihood of recommending Dr. Koumas to family and friends is 4 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.
Western University Of Health Sciences
Medical School, 1987
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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Locations
Practice
Practice
Practice
Practice
- Call
- Fax
- Hours
- Mon: 8:00am - 5:00pm
- Tue: 8:00am - 5:00pm
- Wed: 8:00am - 5:00pm
- Thu: 8:00am - 5:00pm
- Fri: 8:00am - 5:00pm
- Sat: closed
- Sun: closed
- Directions
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
- Recipient of 1
hospital awardView all patient feedbackHow patients felt about the care they received at this hospital.
81%Patients said they were given information about recovering at home3% lower than the national average
71%Patients said that doctors always listened to them and explained things well5% lower than the national average
Compare with other Family Medicine Physicians
Compare Dr. Koumas with our nearby Family Medicine Physicians at UCI Medical Center.