Gannon Lee Dentistry
Gannon Lee, DDS:
Practice Profile Page


Gannon Lee Dentisrty
Gannon K. Lee, DDS
Mission Viejo, CA













A list of major dental treatments which I offer my patients:

Dental cleaning

White fillings


Inlays & onlays


Pediatric dental care

Clear aligners

Porcelain veneers

Teeth whitening

Dentures & partials

Root canal treatment

Tooth extraction

TMJ treatment

Sleep apnea therapy

Dental implants


Offers Even28 at-home™? No

Offers Even28 at-dentist™? No

Offers Invisalign®? Yes


Monday: 8:00 am to 5:00 pm

Tuesday: 8:00 am to 6:00 pm

Wednesday: 8:00 am to 6:00 pm

Thursday: 8:00 am to 5:00 pm

Friday: Closed

Saturday: Closed

Sunday: Closed





Check out what some of our happy patients are saying about us:

Tim Lai (Source: Google)


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 many friends with very positive feedback that continues to see him. If you are looking for a new dentist, I would highly recommend Dr. Lee.

Marla Werschmidt (Source: Facebook)


This dentist office is professional and thorough. I have had excellent care and feel like the dentist and hygienists are incredibly skilled and honest. I highly recommend this practice!

Margo Y. from Aliso Viejo, CA (Source: Yelp)


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 very nice and Marie his hygienist is excellent !!
You will love Dr. Lee and his staff…

Traci Dawson (Source: Google)


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.

Jennifer Palmer (Source: Google)


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 of years ago. They made a mouth appliance for me which is helping to correct my alignment. After less than two months of wearing the appliance, my bite is almost back to normal!
They are truly honest, caring, and straight-forward professionals. I highly recommend them.

Joe W. from Orange, CA (Source: Yelp)


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!

Vivian L. from Irvine, CA (Source: Yelp)


(…) My husband and I went to Dr. Lee’s office not to long ago.  First of all, they were so accomodating to have our times back to back so that really helped us save on a lot of back and forth.  Then we were introduced to Dr. Lee.  He let us know that we would be meeting with his hygenist and that after we have done an Xray and some cleaning, we would be seen by him to take some pictures and overall review.  Growing up with cavities my whole life, I was expecting lots of mumbo jumbo about how I needed to do this procedure and that procedure.  It wasn’t like that at all.  After the hygenist did my x-rays, she proceeded to give me a cleaning.  I’m a bleeder and hate this part but she was so gentle!!!  I was stoked.  I told her that I would set up my next appt right away so I could get cleaned in 6 mos.  (I’m usually a once a year or two years girl, I know, it’s gross, but it usually hurts).  After Dr. Gannon met me and took pictures of possible problem areas in the future and EXPLAINED WHY I would need it.  It makes sense when someone is showing you visual evidence of what may need to be fixed.  
I let him know that I was looking forward to seeing him in 6mos.  
Honestly, it is HARD TO FIND good dentist that care and that are upfront and prepare you with expectations for your next trip.  I am looking forward to my cleaning in 6 mos.  =)

Eva J. from Encinitas, CA (Source: Yelp)


The office is a nice change from what I was used to. Dr. Lee and his staff greeted me right when I first walked through the door. I was really shocked at the first-class service they put to make you feel comfortable. I didn’t need much treatment, but from the filling I had done, I wouldn’t hesitate to return back for more cavities : P  No pain whatsoever. Now I am happily waiting for my next cleaning appointment. Excellent service and care! A+++

Jamie DeVries (Source: Google)


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…X-rays are much faster and easier! Overall a great experience, and I highly recommend them!

James Hilgers (Source: Google)


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!

Brooke F. from Rancho Santa Margarita, CA (Source: Yelp)


I highly recommend Dr. Lee to anyone looking for a dentist. He is kind, patient, precise and always ensures that you are comfortable. His entire staff is kind and always smiling. I’ve been looking for a long term dentist for a while and finally found it!

Kirsten D. from Encinitas, CA (Source: Yelp)


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.

Tricia Condon (Source: Google)


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!!

Joy Cogan (Source: Google)


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.

Jane T. from Orange, CA (Source: Yelp)


Dr Lee takes his time to work on you and explain each process 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, Marie, is also amazing.  Don’t really even feel the teeth being cleaned and feel relaxed.

Matty S. from Irvine, CA (Source: Yelp)


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.

Patti D. from Mission Viejo, CA (Source: Yelp)


I am 65 years old and Dr. Lee is the best dental experience I have ever had.  He is a caring, expert dental professional.  His staff is friendly, professional, and very efficient.  Marie the dental hygienist is friendly, caring, compassionate and very skilled. My experience with Marie is the best I have ever had and she makes you feel very comfortable.  I highly recommend Dr. Lee and his staff.

Jason W. from Irvine, CA (Source: Yelp)


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 treatment is actually pretty rare among the dentists I’ve been to. Even though it doesn’t quite have the same effect as Novocain, a few words of encouragement do help assuage the fear and discomfort typically associated with dental care.
Also, his team, from the assistant to the hygienist, also seems to share the same work ethic in providing great, comprehensive service.  The positive vibe of the office makes it all the more comfortable (…).

Sergio Rodriguez (Source: Google)


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 experience in this office and would highly recommend!

David B. from Irvine, CA (Source: Yelp)


(…) Dr. Lee was calm, patient, and knowledgable. I was really impressed by how politely he spoke to his front desk receptionist and his assistant, even when they needed his help for clarification – and this was past normal business hours had ended, so I’m sure he had a long day. A very kind guy. He even pointed out that my teeth were showing signs of wear at night, possibly from stress.  I’m going to look into getting a nightguard now.
To solve my chip issue, Dr. Lee took photos of my teeth and projected them onto the monitor at eye level. I got to see a clear, large image of my 2 front teeth. He then explained my options, we decided to grind them down little by little, and I got to hold a mirror to decide when my 2 front teeth matched. I was thrilled. So thrilled, that I asked to take a before and after photo of my teeth to show my friends, family, and coworkers.
Dr. Lee understands how customer service works. His knowledge, patience, and modesty would make any patient feel that they’re making the right choice by sitting in his office. I highly recommend!

Mike B. from Rancho Santa Margarita, CA (Source: Yelp)


You can’t go wrong with Dr. Lee. He is personable (he sent my wife and me handwritten cards after our first visits) and is detail-oriented. His dental hygienist, Marie, and front office receptionist, Kelly, are very friendly and thorough. I recommend this office to everyone.

Joanna J. from Solana Beach, CA (Source: Yelp)


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.

Brent Helton (Source: Google)


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, a great experience and extremely thorough

Lula G. from New York, NY (Source: Yelp)


Staff was friendly and Dr. Lee did a great job explaining everything in detail and sharing the reasoning behind his treatment plan by reviewing the records with me. If you are in search of a great dentist with integrity, skills, and a warm honest chairside demeanor, go see Dr. Lee.

Inho L. from Brea, CA (Source: Yelp)


(…) The office is very clean and efficient. You don’t have to wait around after you arrive on time. If they schedule you at 10:15 am, you are on the chair at 10:16 am unlike other dentists who try to cram as many patients as they can in a single day. I really appreciate the fact that they see their patients according to their scheduled appointment.
Dr. Lee and the staff are very knowledgeable and have a sense of pride when they are working, unlike other dentists who seem to just go through the daily routine. They explain each process of the visit and communicate very well with you what needs to be done and they educate you on how you can improve your dental health (…).

Shawn Linnert Teske (Source: Facebook)


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

Gretchen Lee (Source: Google)


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 ways to keep my teeth healthy to avoid dental problems in the future. Marie did my cleaning. She was gentle, and my teeth felt nice and clean afterward. I also like having the option of getting appointment reminders by text, very convenient.

Jessica R. from San Diego, CA (Source: Yelp)


They are excellent! I usually don’t rave about things, but this is something I feel needs a mention. Dr. Lee and his staff really focus on my personal attention. I’ve been to other offices where the dentist doesn’t spend the time with you or are whisked away. Not here! He spent a lot of time with me and answered all my questions. And the best thing was NO PAIN! I can’t say that for everyone, but my experience was great. I am definitely looking forward to my next visit.

Carol Bartos (Source: Google)


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 snore appliance. Years ago I was diagnosed with sleep apnea and this helps me avoid a c-pap machine. I would recommend this doctor.

Sara Y. from Los Angeles, CA (Source: Yelp)


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 husbands snoring problem with R.O.A.R!!! I was near kicking my husband out of our room because he snored so loudly every day but Dr. Lee’s treatment IMMEDIATELY solved it- no exaggeration. I haven’t heard a peep from him at night since being treated by Dr. Lee. Thank you Dr. Lee and staff!!!


The team at Gannon Lee DDS is pleased to serve patients and deliver the brightest smiles. We will make sure your experience here is one of the most satisfying and personalized in dentistry. Our efforts are invested towards creating an accommodating treatment plan that will help patients progress towards a healthier and lifelong-lasting smile. Dr. Gannon Lee is an experienced dentist who has served Mission Viejo for several decades. His experience has included treatments such as orthodontics, Lumineers, dental bonding, Invisalign, dental implants, teeth whitening, and cosmetic dentistry. As an Orange County native, he invests in the latest technology to deliver superb smiles that match the beauty of the Southern California weather. He is certified in Lumineers, Zoom, CEREC, and Invisalign