SSM Health Medical Group
Michael Hemmersmeier, DO Family Medicine in O Fallon, MO
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 church in conjunction with his children's athletic interests. Dr. Hemmersmeier has been awarded recognition from the National Committee for Quality Assurance (NCQA) Diabetes and Stroke Physician Recognition Programs for meeting national standards for diabetes and stroke care.
Dr. Hemmersmeier is part of a Patient-Centered Medical Home.
Dr. Hemmersmeier uses telehealth services to conduct video office visits with current, established patients for: upper respiratory infection, sore throat, cough, seasonal allergies, skin rashes or lesions, mouth and cold sores, flu symptoms, conjunctivitis, UTI, gout, yeast infection and travel medication.
_A forward-facing camera and internet access are required, and a tablet or computer/laptop may be used. Telehealth appointments can be scheduled online through MyChart._
Dr. Hemmersmeier is part of a Patient-Centered Medical Home.
Dr. Hemmersmeier uses telehealth services to conduct video office visits with current, established patients for: upper respiratory infection, sore throat, cough, seasonal allergies, skin rashes or lesions, mouth and cold sores, flu symptoms, conjunctivitis, UTI, gout, yeast infection and travel medication.
_A forward-facing camera and internet access are required, and a tablet or computer/laptop may be used. Telehealth appointments can be scheduled online through MyChart._
About Me
Specialties
Family Medicine
Gender
Male
Education
A.T. Still University (Kirksville College Osteopathic Med)
Medical School, 1995
Forest Park Hospital (facility closed)
Internship, 1996
Forest Park Hospital (facility closed)
Residency, 1998
Hospital Affiliations
SSM Health DePaul Hospital - St. Louis
SSM Health St. Clare Hospital - Fenton
SSM Health St. Joseph Hospital - Lake Saint Louis
SSM Health St. Joseph Hospital - St. Charles
SSM Health St. Mary's Hospital - St. Louis
Certifications
American Board of Family Medicine
Drug Enforcement Administration
Missouri Dept of Health/Narcotics&Dangerous Drugs
Missouri State Board of Registration
Medical Interests
Abdominal pain
Abnormal uterine bleeding
Acne
Acute and chronic hepatitis
Acute sinusitis
Addictive personality
Adolescent gynecology
Adrenal disorders
Age spots
Alcoholism alcohol treatment
Allergy treatment
Reviews
Rating Breakdown
Reviews are measured on a scale of 1 to 5, with 5 being the best score.
Question Breakdown
4.9Overall Experience4.9Listened Carefully4.9Explained Things Clearly4.9Knew Medical History4.9Involved in Care Decisions4.9Showed 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.
4.9 out of 5
566 ratings,
221 reviews
10/30/2026
Very caring. Love that he will see children the same day if they are sick.
10/28/2026
Hope he doesn’t retire soon!!! I need his knowledge, help, and support on my twisty cancer journey towards my heavenly home.
10/27/2026
I feel very comfortable leaving my health issues in the hands of Dr Hemmersmeier.
10/21/2026
He is a OUTSTANDING Doctor. Very Caring. Always goes Above and beyond. The BEST!!!
10/21/2026
Dr. Hemmersmeier is very knowledgeable, kind, understanding and explains things for me to understand easily.
Map & Directions
SSM Health Medical Group
1101 Highway KO Fallon, MO 63366
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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