Patrick Chiasson, MD, MA, FACS

Tucson Weight Loss Surgeon

Minimally Invasive Surgery Specialist performing Laparoscopic Bariatric surgery, Endoscopic Sleeve Gastroplasty, and Hiatal Hernia / LINX procedures.



Ready for a Fresh Start? It’s time to take Control.

Patrick Chiasson, MD, MA, FACS

Tucson Weight Loss Surgeon

Minimally Invasive Surgery Specialist performing Laparoscopic Bariatric surgery, Endoscopic Sleeve Gastroplasty, and Hiatal Hernia / LINX procedures.

Ready for a Fresh Start? It’s time to take Control.

Dr. Patrick Chiasson, Tucson Bariatric Surgeon, Foregut Surgeon,
According to the National Institute of Health,


1 in 5 adults suffers from Gastroesophageal reflux disease (GERD).

Fighting A Modern Day Epidemic

According to a recent New England Journal of Medicine article, 50% of American adults will have Class I obesity (defined as being 50 lbs overweight) by the year 2030.  We now understand that obesity is associated with multiple medical conditions such as GERD, diabetes, heart disease, and cancer.  Dr. Chiasson has championed cutting-edge, minimally invasive surgical procedures throughout his career to give people a fighting chance at saving their lives.


Dr. Patrick Chiasson, the premier Tucson Weight Loss Surgeon, treats a number of digestive diseases, each with a minimally invasive technique that lends to faster recovery and less scar tissue. Each of the digestive disorders shown below is a serious condition and requires immediate attention. Understanding there is a period of time to educate oneself prior to taking the leap and setting an appointment, we want to provide you with as much useful information as possible. Click on the conditions below to learn even more.

Dr. Chiasson strongly believes in the importance of providing service to all members of our diverse community.


MDsave is available to anyone paying out-of-pocket, uninsured or insured, and looking to save money on Bariatric procedures with upfront pricing. Click on the MDsave button below for more information., dr. patrick chiasson, Bariatric Surgeon Tucson


Dr. Chiasson believes that the newly evolving field of Endo-Bariatrics is poised to play a significant role in the management of obesity.

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Orbera Intra-Gastric Balloon is a non-surgical out-patient solution designed to temporarily (six months) augment and accelerate weight loss when combined with dieting.

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Endoscopic Sleeve Gastroplasty is an “Incisionless” non-surgical out-patient procedure that decreases the volume of the stomach by 70-80%.

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Endoscopic Revision procedures provide a second chance for patients who have had a Sleeve Gastrectomy or Gastric Bypass to attain their weight loss goals.

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The Sleeve Gastrectomy is a surgical procedure in which about 85% of the stomach is removed.  It is often performed as an outpatient and is the most popular surgical weight loss procedure.

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Gastric Bypass is the ideal surgical procedure for obese patients with severe heartburn (GERD). The Gastric Bypass is generally performed as an in-patient procedure.

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Single Anastomosis Duodenal Switch (SADI-S) is the ideal surgical procedure for our heaviest patients or those with severe diabetes.

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Laparoscopic Revision procedures provide a second chance for patients who have had a Sleeve Gastrectomy, Gastric Bypass, or the Single Anastomosis Duodenal Switch to attain their weight loss goals.

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Hiatal Hernias are very commonly associated with severe heartburn. They are not all the same and sometimes can be life-threatening. It is important to know that Hiatal Hernias do not go away over time.

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The “TIF” procedure is an “Incisionless” non-surgical solution designed to treat moderate heartburn in patients without a hiatal hernia.

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The LINX device is designed to decrease heartburn by improving the function of the muscle/sphincter that separates the stomach from the esophagus. The LINX device works has a two-way reinforcement of the lower esophageal sphincter (LES).

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The Toupet fundoplication is a procedure that decreases heartburn by partially re-enforcing the muscle/sphincter that separates the stomach from the esophagus in patients who have a poorly functioning esophagus.

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New Offering Section



Tucson Bariatric Surgeon, Dr. Patrick Chiasson, believes that the newly evolving field of Endo-Bariatrics is poised to play a significant role in the management of obesity.

The U.S. Food and Drug Administration (FDA) recently authorized the “Apollo ESGTM System” to perform this groundbreaking procedure.  ESG is an endoscopic weight loss procedure involving a small suturing device attached to the end of a GI endoscope. The endoscopist uses the suturing device to reduce the size of the stomach from the inside significantly. The procedure involves no incisions or scars and does not remove any of the stomach.

Over 25,000 patients have undergone the Endoscopic Sleeve Gastroplasty (ESG) procedure worldwide, and there is ample published evidence that the weight loss effects of the procedure are long-lasting.  The ESG is indicated for adult patients with obesity who have not been able to lose weight or maintain weight loss through more conservative methods.  “I feel that this procedure will help to bridge the treatment gap for individuals who are fearful of invasive bariatric surgery.” Read More


Due to COVID-19 we are putting our Bariatric Events on hold for the forseeable future. We will update our website and the Event Calendar once we have new dates available. Thank you for your understanding and patience.


Start your journey to better health with a simple call to the office of Dr. Patrick Chiasson, your premier Tucson Weight Loss Surgeon.


Dr. Chiasson, your experienced non-invasive Tucson Weight Loss Surgeon and Foregut Surgeon is committed to educating the public about the very real outcomes that come with digestive disorders and diseases. He has attracted an entire community of people that come from all over the country to take action and fight for their lives.


“After suffering from Gastroesophageal Reflux Disease (GERD) for many years and achieving only short-term relief from a variety of medications, I realized that I needed to find a permanent cure for my illness and help me to regain a normal, functional lifestyle.

I checked the Internet for area surgeons that specialized in GERD-related issues and, after thoroughly vetting each of the doctors listed, made an appointment to meet with Dr. Patrick Chiasson.  During my initial visit Dr. Chiasson listened carefully to my concerns and took the time to discuss the best available options that could manage and hopefully resolve my condition.  After discussing options with Dr. Chiasson I was interested in learning more about the Linx Reflux Management System. Dr. Chiasson demonstrated the simple device made of interlinked titanium beads and explained that it is installed at the junction of the esophagus and the stomach through a minimally invasive laparoscopic procedure. As an engineer I was intrigued by the device’s simplicity of design and its significant record of proven effectiveness. After some additional study of the Linx Reflux Management System I advised Dr. Chiasson that I would like to move forward with the procedure.

Over the next three weeks I underwent several tests designed to determine the severity of my condition and to generate data that would be used to determine if the Linx Reflux Management System was appropriate for me. After the test results were reviewed I was scheduled for surgery. From the minute I entered the Northwest Medical Center I was provided with immediate attention and care. The in-processing procedure was quick and efficient and within a very short time I was taken back to the pre-op area. Once again the professional staff was efficient and attentive and through their professionalism and humor placed me at ease. I obviously don’t have any memory of what happened next, but when I awoke I was taken to my room where at team of caring professionals assured that I received all the attention and care that I needed. The next morning I was discharged and was able to complete my short recovery at home.

Today marks two months since my surgery and I can honestly say that my life has changed for the better. The proton pump inhibitor medications that I had been taking for the past five years are no longer needed. I have not taken any medication since my surgery and I have not experienced even one episode of pain or discomfort that was a daily occurrence prior to my surgery.

Dr. Chiasson and his team provided me with an opportunity to enjoy the rest of my life without pain and without medication.  His staff is friendly, knowledgeable and professional and always greeted me with a smile.  I would like to thank Dr. Chiasson for his skill and compassion for his profession. I fully endorse Dr. Chiasson for anyone who needs relief from recurrent pain.”


"I would highly recommend Dr. Patrick Chiasson. He is very kind, caring, and listens to you. Dr. Chiasson will spend as much time as necessary explaining everything and answering all questions. After my gastric bypass 10 years ago, I gained the weight back. Dr. Chiasson explained all of my options very thoroughly, and we agreed on the Enteroenterostomy Anastomosis to revise my Gastric Bypass procedure. It was laparoscopic and performed as an outpatient procedure. Dr. Chiasson spent time talking with me prior to the procedure in pre-op, and again offered support, reassurance, and answered my questions. I was home within a few hours after surgery. Recovery was fast and went very well. As A Registered Nurse, I see the great care Dr. Chiasson gives to his patients. As a patient, I received the same wonderful care."


"Prior to attending the informational seminar about weight loss surgery, I was unaware that gastric surgery could be done with a single incision. After learning that indeed it can be done if one meets certain size requirements, I was still ambivalent about having one or many incisions because I knew that for vanity reasons, I wouldn’t be showing off my scars either way. When Dr. Chiasson approached me with the option of doing the spider incision, I decided to go along with this method. After my surgery, I was very happy that I just had one incision instead of multiple. With just one incision that needed to heal, I felt that my recovery time was easier and shorter compared to others who had many incisions that needed to heal. I would recommend this approach to anyone who is considering it."


"Dr. Chiasson, I wanted to let you know how happy I am with my outpatient vertical sleeve surgery. You changed my life, for the better! Everyone I encountered was kind, helpful, and knowledgeable. Both you and your staff took the extra time with me to answer all my questions and to make sure I had everything I needed. I was pleasantly surprised this could be done as outpatient surgery and I could recuperate in my own home the very same day. It was such a comforting feeling. The surgery went smooth, my time in the recovery room was with exceptional care before being discharged. You can tell that you and your staff really care. I would highly recommend Dr. Chiasson if you are looking to do VGS and look into it as an outpatient, you will be glad you did."


"(Dr. Chiasson’s) bedside manner is impeccable and he has an uncanny way of making you feel like you’re the MOST IMPORTANT person in the world to him; that he would do anything for you he possibly could…Dr. Chiasson is the BEST doctor I’ve ever had the privilege of knowing. He removed my gallbladder a year after my weight loss surgery and I entrusted him with my life twice… I am at goal now… He literally gave me back my life! Both his surgical competence and bedside manner are SUPER."


"Dr. Patrick Chiasson is an excellent doctor who took the time to really understand my medical needs and did a great job of listening. From the initial appointment, the follow-up appointment, the surgery, and the post-op appointment, I knew I was in caring and knowledgeable hands. I would recommend Dr. Chiasson to anyone who may need his services. Thank you Dr. Chiasson!"


"I am so grateful and so lucky to have been referred to Dr. Chiasson who has a great bedside manner and fully explains and answers questions. He never seems pressed for time on office visits and it is a relaxed and engaging experience with the staff at the office. The entire experience was a good one with a really good outcome. I h ave a new lease on life and I want to thank Dr. Chiasson for his help and skill. I fully endorse Dr. Chiasson for anyone considering bariatric surgery."


"I want to thank Dr. Chiasson for giving me a second chance in life. I would not be able to handle being over 400 lbs. I had surgery Nov.12, 2014 and currently down a total of 190 lbs. I was asked to speak at a national weight loss surgery conference a couple of weeks ago and never thought that I would stand up in front of a crowd of people from across the county and talk about my success. Thank you so much again, Dr. Chiasson. I am living life again to the fullest."


"As someone who has a master's in nursing and someone who has had 22 operations in the last five years, I can attest to the fact that I have never experienced a more hands-on, involved Dr in my life. Dr. Chiasson seeks to not only help his patients but improve their quality of life. His compassion and considerate nature are unmatched. Though he does many bariatric surgeries, I saw him for a medical condition that few Doctors are willing to treat and he exceeded all of my expectations."


"Dr. Chiasson was part of the team that literally saved my life when I was diagnosed with cancer of the gastric/esophageal junction. His surgery was nothing short of miraculous. There are no signs of cancer and I am now having follow-up chemo and radiation therapy. I have a very well-founded hope of complete and long-lasting recovery. I’ve been told that this particular surgery if done in the traditional manner, requires at least two to three weeks of hospitalization and a prolonged period of recovery. I went home on the fifth day, already starting to eat on my own, and continued to add foods daily, in conjunction with a feeding tube for a short while."


"I had a Gastric Sleeve surgery in December 2014. Dr. Chiasson and his team provided outstanding care prior to the surgery, on the day of the surgery, and for the last year and a half. Everyone has been highly professional and caring. My surgery has been a success and I appreciate the continued support offered by his team as I continue to live my new healthy life. Thank you, Dr. Chiasson, for being there when I really needed assistance with my healthcare. You have given me my life back with my husband and children — I’ve lost 140 lbs and I’ve never felt better!"


“I had laparoscopic Roux-en-Y gastric bypass in 2004 performed by Dr. Chiasson and it was the best medical experience for me. I have kept the weight off after 10 years and have not had a re-occurrence of high blood pressure nor diabetes. If you decide bariatric surgery is for you, I would recommend having your gall gladder removed at the same time, as this was the only complication from the initial surgery."

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In 2016, more than 1.9 billion adults, 18 years and older, were overweight. Of these over 650 million were obese. You are not alone and you do not need to feel any less of a person if you are overweight or obese. Take action now and increase your quality of life with Dr. Patrick Chiasson, the leading Tucson Bariatric Surgeon.