Dr. Koo is board certified in family medicine. She completed her internship at Deaconess Health System and completed her residency at Forest Park Hospital. Her medical degree was earned at Kirksville College of Osteopathic Medicine. Dr. Koo has a special medical interest in musculoskeletal injuries and preventative medicine.

Dr. Hemmersmeier is board certified in family medicine. He completed his residency at Deaconess Hospital – St. Louis after earning his medical degree at Kirksville College of Osteopathic Medicine. Dr. Hemmersmeier has been in practice in O’Fallon, MO since 1998. He has a special interest in sports medicine and has volunteered as a coach in the community and at his... Read More about Michael Hemmersmeier, DO