Finally feel like yourself again.
Acid reflux. Trouble swallowing. Waking up at 3am. Living on medication. It doesn't have to be this way. Dr. Dunn helps patients get their lives back — for real.
This is what life feels like when reflux isn't running the show.
Before you had to scan every menu for "safe" foods. Before you checked which side of the bed was elevated. Before every meal came with anxiety.
What makes Dr. Dunn different from the rest.
Expert-Level Experience
Trained at top academic centers. Far past the learning curve in foregut surgery.
Private Practice, Personal Touch
You speak directly with Dr. Dunn — not a rotating team of strangers.
Patients Travel to See Him
People come from Nevada, Arizona, and across California.
Most Major Insurance Accepted
Cigna, Anthem, Blue Shield, Aetna, United, Medicare & more.
What we treat
Every condition below has one thing in common: it can keep you from living your normal life. We can help you get back to it.
A gut specialist you can actually talk to.
Dr. Dunn trained at top academic medical centers. He has done hundreds of foregut surgeries, far more than most surgeons in the region. He chose private practice so he could actually get to know his patients.
"My job isn't just to do a good surgery. It's to make sure you understand what's happening, feel comfortable, and that we do this right, together."
Patients travel from Nevada, Arizona, and across California to see Dr. Dunn. Not because there isn’t a doctor closer to home, but because they want someone who gets it right the first time.
We don’t hand you discharge papers and call it done. Here’s what we promise—in writing:
How our guarantee works
Off your meds
No more daily antacids or reflux medication within one month of surgery. Most patients are surprised by how quickly they stop reaching for the bottle.
Sleep flat again
Lying flat without reflux within one month, no more propped pillows or elevated bed frames at night. Wake up rested, the way you used to.
Eat your favorites
Enjoy your trigger foods again within one month of your surgery. Spicy food, coffee, wine, back on the table, without the worry.
Ready to stop managing it and start fixing it?
Most practices hand you discharge papers and wish you luck, we keep working with you, at no extra cost, until all three happen.
*Guarantee applies to GERD/hiatal hernia surgery patients. Some patients may have additional conditions that affect outcomes.
Real people. Real results.
Dr. Dunn was kind, professional, and very caring throughout my experience. Before my procedure, he took the time to explain everything clearly and made sure I understood what to expect. He also followed up afterward and explained everything thoroughly, which gave me a lot of reassurance. I truly appreciated his professionalism, compassion, and the way he made me feel comfortable and informed throughout the entire process. I highly recommend Dr. Dunn!
I'm so greatful to Dr. Colin Dunn for my 270 degree fundoplication and hernia repair. I've had 13 difficult years of GERD and LPR following my first pregnancy. I had tried western medication (PPIs) as well as naturopathy (HCL supplements) and a low acid and low fat diet but my issues continued to progress over the years until my LPR got so bad I was coughing after everything I ate no matter how light/healthy it was. I'm so happy there was a solution and that it worked! Only a week or two after surgery I was starting to eat things I couldn't before like peanut butter, chicken soup, and milkshakes. When I added peanut butter to my oatmeal and ate it my 9-year-old daughter started crying because she knew her momma was going to be okay. This surgery honestly gave me my life back. Before, I was starving and going insane with fear and worsening LPR, and now I can eat anything I want and get my strength back to raise my kids and have some fun! The interactions with his assistant were great as well and the pre-op and post-op experiences were clear and helpful. I also felt that the nurses at Good Samaritan were great. I would definitely recommend doing your surgery with Dr. Dunn because you are going to get talented people and all the best tech. Now time to go eat some cake for Mother's Day!
Dr. Dunn and his team were a blessing! Had to remove my gallbladder on emergency, he was heaven sent. Thank you again for taking care of me. My family and I can not thank you enough. His expertise and professionalism was truly appreciated.
I am very thankful to have found Dr Dunn. He is knowledgeable, compassionate, skilled, and easy to talk with and understand. He was accessible and responsive to my concerns and remembered small details that I was concerned about. Hernia repairs went smoothly. I highly recommend Dr Dunn. Thank you Dr Dunn.
Dr. Dunn was great and made me feel instantly comfortable. At age 55 and having my first surgery, I was nervous; but after our meeting I knew I was in good hands. Post surgery and recovery has been fantastic and successful! I highly recommend him.
Dr. Dunn performed an emergency gallbladder removal surgery less than a month ago. I feel great! Dr. Dunn is vey calm and very professional, explains everything clearly before the surgery. I highly recommend him. Thank, doctor.
I have suffered from GERD for years, and was determined to get off of PPIs (omeprazole) which I had been taking for years. Dr. Dunn and his staff navigated me through the process of testing and eventually corrective surgery which removed the need for me to be on any medication for this issue, aside from an occasional Tums. Nobody wants to have surgery and recovery, but they made it as easy as possible for me and the recovery was not difficult. Dr Dunn is amazingly knowledgeable and was with me all the way.
Excellent experience - first time under going surgery (hernia repair) and the process was seamless. He was very transparent and understanding from the beginning and thoroughly answered any questions. Procedure went great, recovery was smooth, and check up appointment was the easiest ever. Highly recommend!
Dr. Colin Dunn is truly my hero. I was admitted to the hospital from the emergency room on May 6, 2025, with a ruptured appendix. From the moment Dr. Dunn walked into my room, he showed genuine kindness, compassion, and even brought a much-needed sense of humor to a stressful situation. He clearly explained the findings from my CT scan and walked me through his surgical plan in detail, scheduled for the next day. What stood out most was his passion for his work and the calm confidence he carried, not only in explaining the procedure to me but especially in reassuring my wife that I would be okay. Dr. Dunn quite literally saved my life. I cannot thank him enough, but I am forever grateful for his skill, care, and dedication. I highly recommend Dr. Dunn for his exceptional surgical expertise and compassionate bedside manner. He truly has blessed my life. Thank you Dr. Dunn and your medical team.
Based in Los Gatos.
Patients from everywhere.
Our office is in Los Gatos, CA, right in the heart of Silicon Valley. But we regularly see patients from Nevada, Arizona, and all across California. Most patients tell us the trip was worth it.
