We offer personalized care to our patients, and our primary concern is your health and comfort!

Meet Gannon Lee, D.D.S.

Dr. Gannon Lee is an Orange County native who has been practicing dentistry for twenty years. Dr. Lee earned his dental degree from the University of Southern California, after earning his bachelor's degree in Biological Sciences from the University of California, Irvine.

After nearly a decade in his private practice in Encinitas, California, Dr. Lee decided to relocate back to Orange County. It was a very difficult decision to leave good friends, patients, and relationships he has built up over the years. However, he and his wife had just welcomed a baby girl to their family and they realized it was the best choice to relocate back to be closer to family. Dr. Lee was a former Junior Olympic swimmer and in his free time, still enjoys swimming. He is also an avid Los Angeles Lakers fan and cheers for his USC Trojans. Aside from patient care, he and his wife are busy raising two wonderful girls: Elise and Kathryn.

Meet The Doctor
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Our Family Caring for Yours

Our commitment to excellent oral care is one of the ways in which we welcome patients to our office. We have a trained and dedicated staff that strives to create a pleasant and comfortable experience. Dr. Gannon Lee specializes in high quality cosmetic and preventive care that will help you maintain healthy teeth and gums throughout your life.

We are pleased to have you visit our office for dental care and will make sure your experience here is one you can smile about. At Dr. Gannon Lee’s office, you are a patient and a friend, because our dental care is dedicated towards fulfilling your personal and dental needs.

Meet The Team

We Accept All PPO Plans
We also offer an in-house dental savings plan.
Please contact us for details!Call Us For More Information!


A Mission Viejo winner of the 2015 Patients’ Choice Awards in Dentistry

Verified by Opencare.com


What our patients are saying...

"Dr Lee was excellent at taking good care of me!I would highly recommend him."

"Very friendly staff! Made the usual scary dentist experience pleasant. Dr. Lee was super thorough in his exam and explanations and a great listener to all my concerns and questions. Expertise and kindness! Special thanks to Maryann, my teeth have never felt cleaner and thanks for all the great flos…"

"I was so happy with my experience with Dr. Lee and his staff when they made an oral appliance for me to wear at night, I made an appointment and went in for routine care. I'm very glad I did. They took full x-rays, then Dr. Lee reviewed them. Next, he examined my mouth and under my tongue. He foun…"

"Great care and very solid team at Roar. Very happy with my results."

"I had a terrific experience with Dr.Lee. He took the time to explain everything to me. He asked me questions so that he could understand how to help me. I will definitely go back for further treatment!"

"Over the past three years, I have suffered from sleep apnea. In spite of trying all kinds of masks, I was constantly at war with them. I felt as if I were suffocating. It wasn't until I discovered Dr. Gannon Lee and Roar Associates that I found help for my sleep apnea. As a result of his close coop…"

"Great place. Dr. Lee is great."


"I have been to a lot of Dental Professionals and there’s no comparison with this office. The staff and Doctor Lee, are the best I’ve seen. Everyone is wonderful, compassionate and professional. I believe I have finally found a doctor that can help me!! Thank you Doctor Lee!"

"Friendly and efficient."

"Excellent, Friendly and Professional!!"

"Dr Lee and his staff are very prompt, knowledgeable and friendly."

"Called yesterday and was able to be seen today. Again, excellent service, everything explained and all questions answered. Dr. Lee and staff do a great job."

"Dr. Lee has been my dentist for over 5 years now and I've been very pleased. He has handled cavities, crowns and keeps an eye on pending problems. I always feel as though he has my best interests and health in mind. I appreciate his honesty and advice. His calm demeanor is extremely helpful to put …"

"The entire staff at Gannon Lee DDS is FANTASTIC! I love the “fun spirit” of everyone at the practice! All members of the staff are incredibly professional, and Dr. Lee spends personal time with all of his patients."

"Dr. Gannon Lee and his staff are the best! He is a perfectionist and that means everything he does is excellent. I worked in the dental field in the past and I understand what a skilled dentist he is. We have recommended a dozen friends to him. They have all been very impressed with him and his …"

"Highly recommend Dr. Lee for anybody looking for a dentist! The staff is professional and very friendly. The practice uses the latest tech for treatment."

"Great service. First class treatment. Very gentle.."

"Dr. Lee is very thorough, personable and genuinely cares about his patients. Had a temp crown done today and it went great. I have extreme TMJ pain and he was so patient with me when I needed to take breaks. Highly recommend."

"Dr. Lee is very knowledgable about sleep apnea."


26302 La Paz Rd Suite 210, Mission Viejo, CA 92691

Phone: (949) 380-0315

Office Hours

Monday : 8:00 am - 5:30 pm

Tuesday : 8:00 am - 5:30 pm

Wednesday : 8:00 am - 5:30 pm

Thursday : 8:00 am - 5:30 pm

Friday : Closed

Saturday : Closed

Sunday : Closed

Get in Touch

Email: info@gannonleedds.com

Phone: (949) 380-0315

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