Mario Morales, MD
General Surgery

SSM Health Weight Management Services
12266 DePaul Drive, Suite 210 Bridgeton, MO 63044
Meet Dr. Mario Morales, medical director and weight-loss surgeon for SSM Health Weight Management Services. His holistic approach to patient care ensures the best treatment for each individual patient. Dr. Morales and his team offer continuous support and encouragement for patients every step of their weight loss journey.
Dr. Mario P. Morales is a board-certified general surgeon who has additional laparoscopic certification. A graduate of the University of California at San Diego School of Medicine, Dr. Morales completed his residency in general surgery at the University of Missouri-Columbia. During his residency, he performed hundreds of bariatric surgeries and procedures under the direction of Dr. Roger de la Torre. He recently completed a fellowship in bariatric/minimally invasive surgery with the SSM Health Weight Management Services at SSM Health DePaul Hospital - St. Louis where he assisted Drs. Stephen Scott and Roger de la Torre in more than 200 cases. Dr. Morales regularly performs Single Incision Laparoscopic Surgery, which is the fast recovery care standard in weight-loss surgery.
As a mechanical engineer, Dr. Morales has contributed to the design of disposable laparoscopic devices and thorascopic instruments. As a program leader for Computer Motion Incorporated's laparoscopic New Product introduction group, he was responsible for all facets of the design and manufacture of disposable mechanical devices that interact with the ZEUS™ surgical robot.
Dr. Morales has written a wide range of publications, from peer-reviewed journals to chapters in surgery textbooks. He has also been a guest lecturer at the American Society of Metabolic and Bariatric Surgery National Meeting.
Learn more about SSM Health Weight Management Services.
Dr. Mario P. Morales is a board-certified general surgeon who has additional laparoscopic certification. A graduate of the University of California at San Diego School of Medicine, Dr. Morales completed his residency in general surgery at the University of Missouri-Columbia. During his residency, he performed hundreds of bariatric surgeries and procedures under the direction of Dr. Roger de la Torre. He recently completed a fellowship in bariatric/minimally invasive surgery with the SSM Health Weight Management Services at SSM Health DePaul Hospital - St. Louis where he assisted Drs. Stephen Scott and Roger de la Torre in more than 200 cases. Dr. Morales regularly performs Single Incision Laparoscopic Surgery, which is the fast recovery care standard in weight-loss surgery.
As a mechanical engineer, Dr. Morales has contributed to the design of disposable laparoscopic devices and thorascopic instruments. As a program leader for Computer Motion Incorporated's laparoscopic New Product introduction group, he was responsible for all facets of the design and manufacture of disposable mechanical devices that interact with the ZEUS™ surgical robot.
Dr. Morales has written a wide range of publications, from peer-reviewed journals to chapters in surgery textbooks. He has also been a guest lecturer at the American Society of Metabolic and Bariatric Surgery National Meeting.
Learn more about SSM Health Weight Management Services.
About Me
Specialties
General Surgery
Gender
Male
Languages
Spanish
Education
Santa Barbara Cottage Hospital
Internship, 2005
SSM Health DePaul Hospital - St. Louis
Fellowship, 2010
University of MO Hospital & Clinics
Residency, 2009
University of California - San Diego
Medical School, 2004
Hospital Affiliations
SSM Health Cardinal Glennon Children's Hospital
SSM Health DePaul Hospital - St. Louis
SSM Health St. Clare Hospital - Fenton
SSM Health St. Joseph Hospital - St. Charles
SSM Health St. Mary's Hospital - St. Louis
Certifications
American Board of Surgery
Drug Enforcement Administration
Missouri Dept of Health/Narcotics&Dangerous Drugs
Missouri State Board of Registration
Medical Interests
Antireflux surgery
Bariatric weight loss surgery
Duodenal switch
Gastric bypass
Gastric outlet and pouch repair
Hiatal hernia repair
Intragastric balloon
Lap band surgery
Laparoscopy
Sleeve gastrectomy
Ventral hernia repair
Reviews
Rating Breakdown
Reviews are measured on a scale of 1 to 5, with 5 being the best score.
Question Breakdown
4.9Overall Experience4.8Listened Carefully4.8Explained Things Clearly4.8Knew Medical History4.9Involved 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.
4.8 out of 5
119 ratings,
54 reviews
8/13/2026
Dr. Morales goes above and beyond! He makes you feel free to ask any questions.
8/11/2026
I have always been impressed with the level of care Dr Morales gives his patients. He is very busy, and always on the go because he takes care of so many different aspects of your journey when youre his patient, but when you need him, he spends the time necessary to make sure you're well taken care of. I've had many issues since my journey started and Dr Morales has done everything possible to make sure I get taken care of properly to get better with every issue that came up. I am getting ready for another procedure with him and would honestly not trust another surgeon with the procedure, no matter how routine it is.
8/5/2026
The best
8/5/2026
Thank you for your excellent care I know you are a busy person but you always make time for me
7/25/2026
Such a great dr!!
Map & Directions
SSM Health Weight Management Services
12266 DePaul Drive, Suite 210 Bridgeton, MO 63044
Mon
7:00 am - 4:00 pm
Tue
7:00 am - 4:00 pm
Wed
7:00 am - 4:00 pm
Thu
7:00 am - 4:00 pm
Fri
7:00 am - 4:00 pm
Sat
Closed
Sun
Closed
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