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


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.

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

Verified by Opencare.com

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.

To help you feel more comfortable, we consistently inform you about every aspect of your dental treatments. We create the best experience for you by ensuring you are aware of what we are doing and why it is being done.

We are heavily invested into providing a dental care experience that is accommodating and flexible for your schedule. Your needs rank high on the top of our priorities list, and we are determined to meet them in the most outstanding manner. We can address your questions and have you ready to be treated by the outstanding talents of Dr. Lee. As a patient, you have the opportunity to enjoy first-class dental care from the hands of a superb professional.

Dr. Lee and his team look forward to creating a bright and smile-oriented relationship with you in order to protect your dental health. If you wish to attain a smile worth complimenting, you can call us today and reserve your appointment!.

We Accept All PPO Plans

We also offer an in-house dental savings plan.

Please contact us for details!

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What our patients are saying...

"Dr.Lee and his staff are the best! You can’t go wrong with a USC dentist!"

"I was very please with the service they provide me ,the doctor and staff,were on time and very good at explaining to me what to do to make everything work better for me. Thank you very much!"

"Highly recommend Dr. Gannon Lee and his very professional staff!"

"Went in for a filling and starting of crown. Dr. Lee is so patient with me and I appreciate it. Very aware of all COVID regulations. It’s like family when you go into the office by all staff."

"Great staff, friendly and thorough. Always a positive experience."

"They are adhering to covid guidelines which made me feel safer about going to get my teeth cleaned (after putting it off for 3 months). Their new hygienist was friendly, professional and competent. I am always nervous about trying a new hygienist because I have sensitive teeth and gums but she wa..."

"Dr Gannon and his staff are very professional, kind and compassionate. He does excellent work! I’ve been seeing him for over 8 months.. and there’s no other Dr would trust with my teeth. He provided me with a device for my obstructed airway. After wearing the new device at bedtime, I not only sle..."

"100% will go again👍"

"Dr. Lee and his staff are always professional, efficient and kind. I’d highly recommend them."

"Excellent experience in all ways, thorough, professional and explains well. I recommend Dr. Lee to everyone."

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

"Yesterday I received the go-ahead to schedule a sleep study as a final test to determine whether my mouth piece will treat my sleep apnoea. I wish to thank Dr. Lee and his staff for their professionalism in getting this achieved so quickly. I look forward to the future thanks to this wonderful op..."

"Very professional and knowledgeable team. Highly recommended"

"I had my teeth cleaned yesterday and I'm very pleased with the new hygienist! She's very nice and professional. (I'm sorry that I don't remember her name.)"

"Dr. Gannon's office staff are kind, professional and efficient. The hygienist did a great job cleaning my teeth."

"I had an urgent need to see Dr. Lee and he saw me immediately and answered all my questions. I was relieved that my condition was not as bad as I had thought. Thanks, Dr. Lee."

"My most recent visit to Dr. Lee was a followup. He fit me for oral devices that replace using a c-pap machine for sleep apnea. He made a necessary minor adjustment that has worked very well for me. The doctor is very professional, explains the technology expertly and is very thorough. I would hig..."

"Dr. Lee is amazingly kind and gentle! He is hands-down one of the best medical doctors I have seen in my life. He noticed immediately that there was a problem with a root-canal and sent me with the appropriate doctor. He took the time to check every single little detail of my jaw and explained ..."

"Dr. Lee is an outstanding dentist. I would highly recommend him. He goes above and beyond for his patients and his office staff are very friendly and efficient."

"Prompt, courteous, gentle and efficient service. The office staff is delightful too!"

"His staff are very attentive and he’s excellent in his skill! I recommend him all the time."

"I had a very good experience. Dr. saved a tooth that had a very iffy prognosis. He was gentle and thorough. He also adjusted my bite that has been off for many years and it is much more comfortable. I am a new patient and the staff was very friendly and welcoming. Also, he made me a new s..."

"Very professional, explained everything that he was going to do and what would happen and what to expect. He made sure I was comfortable and explained all procedures."

"Always feel Dr. Lee and his staff care about me as a person. I also am confident that Dr. Lee does not recommend treatment unless necessary."

"Dr. Lee is the most outstanding dentist I've ever encountered in my entire life!"

"Very personable. Knowledgeable staff. On time with appointments.."

"Friendly caring staff and Dr."

"Everyone at this practice was friendly, professional, and very conscientious. It was by far the best therapeutic experience I have had because each person in the practice was excellent at their jobs, knowledgeable, and compassionate. I highly recommend this practice!"

"Dr. Lee is the most fantastic dentist ever encountered in my entire life, along with his fantastic staff!"

"This place is great, from the staff at the front reception to the back area and Doctor Lee, they are all very friendly, professional and explain things very clear. Keep up the great work!"

"Dr. Lee always takes the time to explain the process and actions he is taking WRT the dental appliance he provided."

"Dr. Gannon Lee and his staff are just wonderful. I would highly recommend them. Dr. Lee is very caring and thorough. The dental hygienist, Sepi, is so considerate and kind I cannot say enough good things about her. 5 stars!"

"Dr Lee is amazingly kind and so gentle! Every single one of his wonderful staff are so very nice and always smiling. They never rush you and sincerely care enough to give you all the time you need!! Definitely recommend!!"

"Dr Lee had an appliance made for me to stop my snoring and interrupted sleep patterns, his chair side manner is great he absolutely knows his profession and when my Dentist retires Dr Lee will be my new Dentist, great experience and extremely thorough"

"Dr. Lee is the most outstanding dentist ever encountered in my entire life, along with his fantastic staff!"

"Was in for periodic teeth cleaning with Sepi. She is the best! She has helped improve my gum health considerably in the last year or so with her comprehensive cleaning technique. Dr. Lee and his staff are the best!"

"Very professional and never ever over “prescribes” what you need done. Very realistic about what to do and the options available."

"Easy to connect, friendly, knowledgeable. Thanks Doc!"

"Very informative and helpful"

"Less than 10 minutes wait. Staff friendly, knowledgeable. Dr. Lee very up to date, skilled and personable. Professional services very individualized to needs."

"I have been visiting Dr. Gannon Lee for a couple years now and he has always been friendly and professional. His staff is very personable and great. Dr. Lee built a special mouth guard for me that's noticeably helped me sleep. And his hygenist always helps me keep my teeth healthy/clean."

"I had a wonderful experience at my appointment. The staff was very nice and Dr. Lee answered all of my questions and concerns very clearly."

"Dr. Lee is a dental specialist I truly trust. He's also calm, patient and willing to answer questions."

"Dr. Gannon Lee and his staff are all warm, friendly people who made my husband and I feel at ease as soon as we met them. They are patient and show a real concern about our comfort. Dr. Lee clearly explains prospective treatment with possible options and offers plenty of chances to ask questions."

"I've been with Dr. Lee for over 10 years, even before he moved to this location and he has solved every dental problem I had with ease and comfort. Not only has he solved all my dental problems (including cleaning, crowns, cavities, dental implant referrals, bite misalignment) but he solved my hu..."

"Dr. Lee and staff are friendly and professional. I am super happy with my new veneers and have received many compliments. I highly recommend Dr. Lee for cosmetic dentistry or any other dental needs."

"Chipped my front tooth at 2pm at work, called Dr. Lee's office, was at home smiling by 6pm! Dr. Lee did an amazing job--fast, friendly and affordable!"

"Everyone efficient, informative, and professional!"

"Some people might not like going to the dentist. These fun people make it so I look forward to going."

"I am a new patient of Dr Lee. And even after just a few visits, I’ve found Dr Lee to be a wonderful professional. Last night was my first night with my new device and it fundamentally help me with my Obstructive Sleep Apnea issue. I slept WELL. And I was well rested and had an energy filled day I..."

"Wonderful doctor and staff. Very thorough, efficient and personable. I highly recommend this office."

"My husband and I really like Dr. Lee. By his verbal summary to me of the sleep study, I knew he had reviewed it completely; and he pointed out information of which I was not aware. I trust his recommendation and appreciated the adjustments he made to my oral appliance. He is a very sincere and kn..."

"Attentive, thorough, and takes whatever time is necessary to properly treat the conditions of his patients."

"I feel very fortunate to have found Dr. Lee and Dr. Riley when I did. I had been CPAP dependant for my severe sleep apnea for years, but so disliked the machine for various reasons. After my consultation and the fabrication of a well-designed oral appliance, I no longer require the machine. And, ..."

"Dr. Lee took his time and patiently considered my dental history. He explained options in understandable terms. He's friendly, professional, and not trying to rush."

"I love Dr. Riley! Such a nice, caring man. He's been treating me for my TMJ and has helped me tremendously. And the staff are amazing! Thank you!"

"The staff is very professional and friendly. Dr. Lee is great he explains each step of what he is doing."

"Both my husband and I received courteous and reassuring explanations of treatment plans. I was especially pleased with the skill and concern of Sepi who specializes in deep cleaning"

"Dr. Lee is always friendly and caring about his patient. I trust him 100% with his recommendations. Would recommend him unconditional to family and friends."

"Dr. Lee and his entire office staff were very helpful, friendly, professional, and knowledgeable. I feel confident that I will receive quality and ethical treatment."

"Excellent dentist in Orange county. Great service and friendly staff. I have been going there for over 10 years."

"Dr. Lee and staff are professional, attentive, and available in an emergency. I appreciate the personal care they provide."

"He's terrific and so is his staff; Sonia, Sepi, Shari and all of them."

"Dr. Lee and his staff are fabulous! They really care about you and your health and make you feel comfortable. They don’t talk down to you, but are very helpful in explaining things. Since he took over the practice, they have made a lot of improvements and brought in state of the art equipment......"

"Dr Lee and his staff are awesome. They are all very caring and helpful and they always have your best interest when caring for you. Dr Lee is very gentle and does a really good job to make his patients comfortable and informed to each step he is taking."

"Dr. Lee takes his time, explains what the required procedures and options are, and does great work. He is thorough and is concerned for his patients, doing whatever is necessary to complete the procedure properly. His staff is polite and willing to assist in explaining fees and insurance coverage..."

"As always Dr.Lee is a great dentist."

"Dr. Lee is very thorough and takes the time to explain everything that he is doing. You can tell he wants what is best for his patients and I feel very caring. His office staff is excellent so what else can you ask for. Dr. Lee will be my dentist."

"I have been going to Dr. Gannon Lee for several years now, when he took over the practice after my dentist retired. He has built a wonderful staff. They are very easy to work with! Safi, the hygienist, is very gentle, yet thorough and Dr. Lee is upfront with what needs to be done and what your op..."

"Caring, knowledgeable, trustworthy and professional. Couldn't recommended more!"

"Caring, knowledgeable, trustworthy and professional. Couldn't recommended more!"

"Excellent dentist and takes the time to get to know me and also explains things thoroughly in a way that I understand. I trust him with my dental care completely."

"Everything about Dr. Gannon Lee and his office is top notch. He is a caring, congenial, informative, and highly skilled professional. He has all of the latest equipment and everything is kept meticulously clean. His staff is very helpful and friendly. Highly recommended!!"

"care and feel like the dentist and hygentists are incredibly skilled and honest. I highly recommend this practice!"

"Dr. Lee really cares about his patients. He explains every;thing. My temporary crown became separated from my and I call his emergency number and he called right back and told me to come in. He met me at his office. This was on a Friday night after 7 in winter."

"Great dentist!"

"Very professional, thorough, and most importantly, courteous. You won't find a friendlier office that cares so much for their patients' comfort. I could not recommend them more!"

"Marie was friendly, gentle, and thorough. I enjoy running my tongue over my teeth after they're cleaned."

"Dr. Gannon Lee does an exceptional job as my dentist. He and his staff are very friendly and great at explaining issues and providing recommendations. He is thorough with exams and dental work and provides the best experience you can hope for when seeing a dentist. I have already recommended ..."

"Dr's Lee and Riley are amazing. My bite was way out of alignment after having a car accident and subsequent spine surgery to replace two of my cervical discs a couple years ago. They made a mouth appliance for me which is helping to correct my alignment. After less than two months of wearing the ..."

"Great dentist and staff."

"Dr. Lee remains professional and extremely competent. gentle, easy to communicate with. i highly recommend him for your dental needs."

"Dr. Lee was professional and courteous. He took time to explain the dental procedures and was very pleasant to be in his office. I am 100% satisfied."

"I hate going to the dentist but Dr. Lee made the experience so easy. He takes his time and always asks how I am feeling. I would definitely recommend him."

"Friendly and competent."

"Excellent service and friendly staff! Been visiting Dr. Lee's office for the past year and every visit is consistent with quality care. Dr. Lee will spend the time explaining the work to be done and always do the right thing for my treatments. Very pleased and happy with his service!"

"Dr. Lee and his office have been so accommodating. They are understanding and provide such great care. I feel so important and know that I'm getting the best dental care possible. I will never go anywhere else! The hygienist, Marie is truly the best!!!"

"I am very fortunate to be treated by Dr. Gannon Lee and his team of experts. He has always taken the time to make sure I understand my situation and the treatments. His staff is also very caring and professional. I definitely feel safe under his care and I highly recommend him."

"I've only been a patient for a short time now, but the thing I noticed immediately about Dr. Lee the most is that he is very meticulous and detailed. He recently did a tooth filling for me and every step of the way he told me what he was doing and explained why he was doing it. This level of tr..."

"Dr. Gannon Lee is the Best!!! He does just what needs to be done, and doesn't do more than what is necessary. Dr. Lee always tells you what he is doing before doing it. I Love that about him! He is so caring, gentle, and really listens. I feel safe when he is working on my teeth. That is the Best..."

"One of the best dentists in the area! Dr. Lee and his staff are extremely professional and caring. Dr. Lee always made sure to make me feel comfortable through all procedures. A huge shoutout also goes to Marie, who always made me feel like a winner after all my cleanings. Overall, I had a great ..."

"Dr. Lee and his office is extremely professional. No problems with scheduling. I had a great time and everyone is so warm and inviting. I highly recommend them for anyone looking for an honest and pain-free dentist."

"Wow, what an awesome dentist. Kind, caring and charismatic, Dr. Lee is one heck of a dentist. It's tough to find a doctor that cares about your well being during dental procedures, which are no fun anyway; but Dr. Lee is that person. Unbelievable satisfied with this dentist!"

"Wow, what an awesome dentist. Kind, caring and charismatic, Dr. Lee is one heck of a dentist. It's tough to find a doctor that cares about your well being during dental procedures, which are no fun anyway; but Dr. Lee is that person. Unbelievable satisfied with this dentist!"

"I love Dr. Lee and how caring he is. In fact I followed him from San Diego county to Orange County. I flossed more and brushed more! He is the only dentist I know that offers cell phone number to patients and follows up with a call to see how the patient is feeling. Five stars in my book."

"I have been a patient of Dr. Lee's since he took over the practice from Dr. Taylor who was very highly rated and retired. Dr. Lee has proven to be more than qualified as a dental expert, and I would encourage anyone looking for a quality dentist to consider Dr. Lee. If you want the best, Dr. Le..."

"I have been a slacker and haven't been to the dentist in about 5 years and Dr. Lee fixed all my worries. Everything was painless and my mouth feels amazing. Very clean environment and great friendly staff. Will recommend him to all my family and friends."

"I absolutely hate going to the dentist office. Many people can relate. They're always trying to upsell you for things you were never aware of. Everything they touch hurts you because they don't care. I have a high pain tolerance but sometimes it's just not ok. My husband and I went to Dr. Le..."

"Dr Lee takes his time to work on you and explain each processes instead of trying to rush through just to get the work done (like prior dentist experiences I had). He is a conservative dentist that tries to preserve your existing teeth and don't try to sell you this and that. The hygienist, Mar..."

"Dr. Lee is not only a great dentist he is a wonderful person and makes you feel very comfortable, because going to the dentist can be a scary thing. He is very professional but at the same time very warm and very good about explaining things so you don't get so nervous.......His staff is also ver..."

"Everyone hates the dentist but I have to say I actually enjoyed my experience here. I had a great experience at my previous dentist but had to switch because I moved. Dr. Lee came highly recommended and I have to say I was very impressed. The office is very clean and efficient. You don't have ..."

"When I chipped my front tooth early in May, I thought that the chip was small enough that I'd just get used to it. I hate going to the doctor or dentist, unless its for my scheduled bi-annual teeth cleaning. After trying to ignore the chip for several weeks, I felt that the chip was either increa..."

"Great experience. The office is easy to find, plenty of parking. Minimal wait time. I arrived at my scheduled appointment time and waited less than 5 minutes. Dr. Lee made me feel comfortable and is very knowledgeable. He explained what he was doing every step of the way, and recommended way..."

"Dr. Lee and staff are wonderful and caring and definitely take their time being detailed with the work. Dr. Lee is a conservative dentist that tries to preserve your teeth as much as possible. Marie, hygienist is also awesome. I don't even realize she is cleaning my teeth! It's a mini-spa tre..."

"I moved from Massachusetts about two years ago where I had (what I considered to be at the time) above average dental care. I didn't do much research before selecting Dr. Lee here in San Diego but boy am I glad that I stumbled upon him and his practice! I have already seen Dr. Lee for a few clea..."

"Dr. Lee's office is very accomodating with my busy schedule. The staff is very friendly and professional. I drive from Orange County to this office because of the care they provide. Dr. Lee's office is HIGHLY recommended."

"Amazing!!! Although I am usually afraid of dentists', the experience had been painless. I am so happy with the service and gentle touch. The dentist did such a great job, he is thorough and you will never want to go to another dentist again."

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

Dr. Gannon Lee DDS

26302 La Paz Rd Suite 210

Tel: (949) 380-0315

MON : 8:30 am - 6:00 pm

TUE - THU : 8:00 am - 5:30 pm

FRI : By appointments only.

SAT - SUN : Closed