SSM Health Medical Group
Wan In Koo, DO Family Medicine in O Fallon, MO
SSM Health Medical Group
301 Caledonia Parkway, Suite 150 O Fallon, MO 63368
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.
About Me
Specialties
Family Medicine
Gender
Female
Education
Forest Park Hospital/Deaconess
Internship, 2000
Forest Park Hospital/Deaconess
Residency, 2002
A.T. Still University (Kirksville College Osteopathic Med)
Medical School, 1998
Hospital Affiliations
SSM Health DePaul Hospital - St. Louis
SSM Health St. Joseph Hospital - Lake Saint Louis
SSM Health St. Joseph Hospital - St. Charles
Certifications
American Board of Family Medicine
Drug Enforcement Administration
Missouri Dept of Health/Narcotics&Dangerous Drugs
Missouri State Board of Registration
Medical Interests
Acute care
Osteopathic medicine
Preventive care
Primary care
Reviews
Rating Breakdown
Reviews are measured on a scale of 1 to 5, with 5 being the best score.
Question Breakdown
4.6Overall Experience4.6Listened Carefully4.8Explained Things Clearly4.7Knew Medical History4.7Involved in Care Decisions4.8Showed Courtesy & Respect
Patient Reviews
SSM Health only displays patient satisfaction data for providers included in our survey process and who have a minimum of 30 returned surveys. The overall rating is an average of all responses to the survey questions listed below. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy. Learn more about our survey.
4.7 out of 5
97 ratings,
46 reviews
8/25/2026
Fantastic!
8/22/2026
Dr.Koo is the best doctor, I have been going to her for many years, she listens and guides me through all the health issues.
8/21/2026
Quick but not rushed. Kind, attentive and compassionate.
8/5/2026
Dr Koo is so helpful and understanding
8/2/2026
She is very thorough and patient with elderly patients.
Map & Directions
SSM Health Medical Group
301 Caledonia Parkway, Suite 150 O Fallon, MO 63368
Mon
7:30 am - 5:00 pm
Tue
7:30 am - 5:00 pm
Wed
7:30 am - 5:00 pm
Thu
7:30 am - 5:00 pm
Fri
7:30 am - 5:00 pm
Sat
Closed
Sun
Closed
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