Michael Hemmersmeier, DO

Family Medicine

1101 Highway K

O'Fallon, MO 63366 Directions

636-379-6363

www.getcare.ssmhealth.com

4.9 out of 5

527 verified ratings

2 Locations


SSM Health Medical Group

1101 Highway K

O’Fallon, MO 63366

(636) 379-6363 Directions


527 Ratings, 193 Comments


The following ratings and reviews are based on verified feedback collected from independently administered patient experience surveys. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy.
May 7, 2026
I have been coming here for many years, and even when I’m in the lab for a blood draw, I am treated with care and kindness. I would not go anywhere else.

May 7, 2026
If he were to leave, I would follow.

May 5, 2026
He made a decision that saved me years ago.

May 5, 2026
Fantastic doctor who cares, listens and is knowledgeable about medical procedures and medicine

May 5, 2026
He listens carefully and thoughtfully provides advice which he explains completely

May 5, 2026
Great Physician! Been a patient 30 yrs and he has a great persona with me. Trust him explicitly for my personal health!

May 4, 2026
Very good experience

May 2, 2026
He's the best. Takes his time to get to know his patients and has their best interest in mind.

May 1, 2026
Caring and making sure that I understand my care

Apr 28, 2026
Professional, knowledgeable.

Apr 28, 2026
He's a great listner and really cares about you.

Apr 22, 2026
Like I stated great physician great practice great location

Apr 22, 2026
Heather the MA is always so positive and nice. She always makes patients smile. Dr. Mike is also very friendly and kind. He makes me feel comfortable and I can tell he cares about my health. Always enjoy coming here.

Apr 17, 2026
Very personal and caring!

Apr 17, 2026
I already have refered a patient

Apr 16, 2026
Skilled, compassionate, approachable, good listener, dependable. I have years of history with Dr. Mike. I feel confident that he will be there for me in times of trouble. He is a true blessing and I am thankful to have him for my PCP.

Apr 15, 2026
Exceptional care. Knows my condition well.

Apr 10, 2026
Superb provider and great relationship with me as a patient and partner in my medical well-being

Apr 8, 2026
Dr. Hemmersmeier is a very caring Doctor. He explains everything very well and gets you the help and care that I need.

Apr 8, 2026
Mike is a straight shooter with information, extremely knowledgeable and very down to earth. Highly recommended!

Apr 8, 2026
Always very easy-going and simple to speak to

Apr 2, 2026
Dr. Mike is a great guy and really helps make you feel at ease. He asked about my family and lifestyle and asked if there was anything else that I needed to talk to him about before I left. He also had me go to the lab and have bloodwork done. I had my results in MYCHART less than 12 hours after my appointment and my appointment was in the afternoon. I couldn’t have asked for anything more.

Apr 2, 2026
He is the best!!!

Apr 1, 2026
He’s been my PCP for more than 20 years and I’m thankful to have him as my initial point of contact into the HC system.

Apr 1, 2026
Great physician and have recommended him to multiple friends.

Mar 28, 2026
My family and I have been with Dr Mike for at least 25 years. It's nice to have a doctor who cares as much for our health and well being as he does. Thank you Dr Mike.

Mar 27, 2026
Best doctor anyone can have!

Mar 25, 2026
He is very friendly and listens well.

Mar 24, 2026
Dr. Mike has been my primary physician for over 20 years. I like that he pays attention and remembers everything. I trust Mike.

Mar 24, 2026
He listened to and answered all my concerns.

Mar 24, 2026
Great doctor!

Mar 24, 2026
I love Dr. Mike!! He's very thorough and treats you like family.

Mar 22, 2026
I enjoy going to Doctor Mike

Mar 22, 2026
Excellent MD

Mar 20, 2026
He is awesome!!

Mar 19, 2026
He’s the Best!!!

Mar 17, 2026
He is always very nice and professional . I’ve been seeing him a very long time . .

Mar 17, 2026
Thank you for providing such great service

Mar 12, 2026
An awesome doctor!

Mar 12, 2026
excellent care

Mar 11, 2026
I've been a patient of Dr. Hemmersmeier since he joined SSM, (about 27 yrs). He really cares about you as a person and patient. I drive over hour for my appointments with him.

Mar 11, 2026
Always polite & listens to my concerns

Mar 11, 2026
He knows my history and I trust him applicably!

Mar 10, 2026
I was very happy overall I spent several months looking for a new doctor since mine had left the area and Dr. Hemmersmeier was recommended by a friend and I really like him. I’m glad I found a new doctor.

Mar 10, 2026
Dr. Mike, is a doctor that I trust! He is always very friendly and welcoming. He takes whatever time is necessary to deal with the reason for my visit. He listens to my problem as well as including me in any diagnosis and treatment he makes. I know that when I see him for a visit, my health is his top concern and he will do whatever it takes to resolve my health issue. Simply put, he is an outstanding doctor!

Mar 10, 2026
Thorough and informative of my lab updated my medication In-N-Out in a timely manner

Mar 6, 2026
He’s very interested in all aspects of my health and is willing to discuss & explain everything

Mar 5, 2026
He’s obviously an excellent doctor and extremely likable as a person.

Mar 5, 2026
Dr Hemmersmeier always makes me comfortable and at ease when talking with him about my health issues.

Mar 4, 2026
One of the best care givers I have ever known.