OC Healthy Smiles
Mark Nguyen, DDS:
Practice Profile Page


OC Healthy Smiles
Mark K. Nguyen, DDS
Costa Mesa, 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

Dental implants

Sleep apnea therapy


Offers Even28 at-home™? No

Offers Even28 at-dentist™? No

Offers Invisalign®? Yes


Monday: 7:00 am to 7:00 pm

Tuesday: 7:00 am to 7:00 pm

Wednesday: 7:00 am to 7:00 pm

Thursday: 10:00 am to 7:00 pm

Friday: 8:00 am to 1:00 pm

Saturday: 8:00 am to 1:00 pm (by appointment only)

Sunday: Closed



Check out some of my treatment photos:



Check out what some happy patients are saying about us:

Alisa T. from San Diego, CA (Source: Yelp)


(…) Every person I interacted with was just a peach and I thoroughly enjoyed chatting with Patty and Stephanie. Dr. Nguyen was fully transparent and detailed with what was going on in my mouth and possible future treatment plans, so respectful, patient, and pleasant, and made me feel totally at ease. Not only that, but also you can always tell how good a doctor is by how they interact with their staff. Dr. Nguyen seemed to have a very good relationship with his staff and particularly his scribe, making sure to ask when he needed something done, thank her when she did something he needed, and always double-check his work. I scribe/work for a pig of a doctor and am incredibly jealous! Also, can we talk about the “comfort menu”? It’s incredible that they provide non-necessities like blankets, aromatherapy spray, chapstick, warm towels, headphones, etc. They go out of their way to make sure you’re as comfortable as possible. Having worked in customer service before, I know how much effort goes into always having a smile on your face and going above and beyond to ensure someone’s happiness, so I appreciate it all. Not to say that they’re not genuine, but that it genuinely seems like they enjoy their work. I can’t rave about this place enough, and I can’t wait to refer all my friends and family here!

Khalid R. from Laguna Beach, CA (Source: Yelp)


I’ve only ever left one review on Yelp before but I feel obligated to recommend OC Healthy Smiles as they have been nothing short of EXCELLENT. All my local family members now get their dental needs taken care of at OC Healthy Smiles. From the front desk to the hygienists, assistants, and of course dentists, the entire team is fantastic- every visit has been a pleasure! Dr. Nguyen is extremely knowledgeable and has gone out of his way to ensure that I am well informed and comfortable. With my most recent procedure, he, Patty, Ivette, and the rest of the team exceeded all my exceptions. Most importantly, I feel like I can trust that Dr. Nguyen and his team have my best interest as a priority. I’ve had several dentists over the past decade, but none of them remotely compare with OC Healthy Smiles’ commitment to excellent service and patient satisfaction! Highly recommended A+.

Lauren C. from La Jolla, CA (Source: Yelp)


All of the staff at OC Healthy Smiles are awesome! They were right on time for my appointment and were very open about everything they were doing during the appointment. They had already previously checked with my insurance so I knew upfront how much I would pay for my first appointment/cleaning. I definitely will be back!

Uziel M. from Stanton, CA (Source: Yelp)


Dr Nguyen is the best dentist I’ve ever been to!  I was referred to Dr Nguyen by my sister who has been a long time patient of his.  My wedding was coming up in two months and wanted some cosmetic work for my big day.  I had not been to the dentist in years, and Dr Nguyen went to great lengths to make me feel at ease and thoroughly explain not only the status of my teeth but what he was doing. He talked to me about all my concerns. I was really impressed by his thoroughness and honesty. His office was nice and really modern. The equipment all seemed new.  His staff was really nice.  Patti was extremely helpful and Dr. Nguyen was great. He knows what he is doing with cosmetic dentistry, and I am completely happy with how my teeth turned out. Now I won’t have any worries about smiling at my wedding!!

Valorie D. from Costa Mesa, CA (Source: Yelp)


OC Healthy Smiles has the best staff, service and dentist I have ever experienced. They were very caring and concerned about my needs and comfort. Dr. Nguyen is so gentle and is an expert in cosmetic dentistry as well as general dentistry. He made some suggestions about what I wanted, cosmetically, and the results were much better than what I had planned or expected. I would definitely recommend this dentist and his staff to anyone, no matter what problem, treatments or cosmetic services they need.

Josh H. from Newport Beach, CA (Source: Yelp)


The entire staff is great!  I have had a long history of dental care that was “good for now” solutions.  I am really happy to have finally stuck with it to get all my work done and to finally have a mouth that has no concerns for pending work.  Dr. Nguyen tells it to you straight and makes solid recommendations for what should be done.  My beat-up teeth are looking and feeling better than ever.  When it comes to your mouth it’s nice to have a team working to ensure your chompers stay in great shape and that your smile is great every day. I recommend OC Healthy smiles to anyone looking to get the best dental care in town. Thank you to all the great staff members and I look forward to my continued visits.

Shane M. from Orange, CA (Source: Yelp)


I’ve been a patient of Dr. Nguyen’s since they first started in (his previous location).  My family continues to come back due to the great service, excellent communication (email, text, and phone calls), and their professionalism. Stephanie has been my hygienist for the past few years and always provides clear explanations and friendly dialogue. Definitely consider them for your dental needs.

Madonna Sarmiento (Source: Facebook)


It was my first time here. Awesome staff very welcoming and caring. Dr. Nguyen explained my treatment very well. I definitely found a new dentist.

Kaitlin B. from Arlington, TX (Source: Yelp)


I broke a molar this weekend and after two days the pain was unreal. I found this dental office on (the internet) and they were so kind and said “come on in right now!” I was so scatterbrained from the pain I forgot my insurance card but the receptionist looked up all my stuff to help get me in (first time here) I was so nervous because I like many have a fear of dentists. The staff was SO AMAZING! Gave me a welcome package with a sweet card welcoming me to the office. Gave me a WARM blanket made everything easy to understand. Offered to turn on TV. Walked me through the process with an understanding of my nerves. Amazing experience!!! Thank you to everyone here. I was beyond happy with how amazing my experience was. I will definitely be referring friends and family here.

Rudy Ornelas (Source: Google)


I’ve had extensive work done at this place, for sure. Everything from a simple cleaning to wisdom teeth removal which was as a seamless experience as it’s gonna get. Dr. Nguyen is so nice and caring. I keep coming back here because of the ’emphasis’ he puts patients first. The atmosphere here is super organized and most importantly clean facilities. I’ve been a patient for a solid 4 yrs. Dr. Nguyen and staff, really nice people.

A. J. Almazan (Source: Google)


Everything’s been amazing. I’ve had Invisalign and cleanings done here and the staff have been great and more than accommodating. Highly recommended.

Courtney O. from Newport Beach, CA (Source: Yelp)


Fabulous dentist, staff and facility. I had previously been using a different dentist and switched to OC Healthy Smiles about a year ago. I am so impressed with the professionalism, knowledge, cleanliness, friendly staff and the technology. Dr. Nguyen is so amazing at making me feel comfortable and explaining every procedure in detail. I am never pressured into anything, but always given great recommendations. The entire staff is wonderful.

Robert S. from Costa Mesa, CA (Source: Yelp)


Great Staff: Polite, helpful, & diligent. Outstanding reception room & office. Impressive dental equipment. Personable, caring, & professional dentist.

Alexis Peterson (Source: Google)


I absolutely love the entire staff at OC Healthy Smiles! Every single person, from the front desk staff to the hygienists and the doctors are very sweet and always care about me personally. Customer service is outstanding and always makes us feel comfortable while getting dental work done! Definitely recommend for a great dental experience!!

Rene C. from Huntington Beach, CA (Source: Yelp)


Awesome dentist! I came in here off of a referral from my sister and I am so thankful she sent me here. Everyone is so nice and I feel like I am getting pampered at the spa at all of my visits. I have never been offered a blanket or scented towels at any other office. Not to mention, everyone is super personable and it doesn’t smell like a dental office. They are super professional and they make going to the dentist less of a chore. Love this office and I will be back.

Lauren Turcotte (Source: Google)


Dr Nguyen is hands down the best dentist I have ever been to!! He and his attentive staff are caring and want to make sure you are comfortable throughout the meticulous examination. Very thankful for my friends referral here!

Dylan M. from Newport Beach, CA (Source: Yelp)


I’ve been going to this dentist for about 18 months now and it’s been great. I work a lot and the fact that they are open on Saturdays is huge for me. I’m an Invisalign patient and Dr. Nguyen has been great every step of the way.

Nhi Duong (Source: Facebook)


OC Healthy Smile staff are very helpful, caring, and friendly. I was lucky that I found this location to have my 4 wisdom teeth removed and do the Invisalign. From the front staff to the back-office staff, the dentist, EVERYONE, was such a pleasure to be around. Dr. Yao was very knowledgeable and very understanding. I was very scared to have my wisdom teeth removed but they calmed me down and entertained me! The procedure went so smoothly. At the time I woke up everything was done. They show me how to take care of my teeth and gum in detail and they were patient to all of my questions as well. I decided to do the Invisalign with OC Health Smile and I never regret it. I’m on my 4th tray now. I know it takes time and effort but as long as you want a beautiful smile you will sacrifice everything for it (no snacking, no munching, no sweet stuff etc. and yes I lost some weights yay). My overall experience with OC Healthy Smile is fantastic. My mouth my teeth are getting so much better. I am very happy that I found OC Healthy Smile. I will come back for more treatments if I need to. The price here is very reasonable, with insurance of course. They offer monthly payment plans without any interest as well. Why not??? OC Healthy smile will not disappoint you. I hope you will have a great smile like me!

Danielle P. from Newport Beach, CA (Source: Yelp)


I’ve had so much work done here over the course of a couple of years. All the employees including Dr. Nguyen, (other doctors), and the assistants and front desk are extremely nice. I just finished a teeth cleaning by Stephanie which was fantastic. She is just extremely kind and sweet. I highly recommend coming here, it is not cheap but I’ll pay for quality work on my teeth. Check out their dental insurance plan, it will save you money in the long run. Thank you OC Healthy Smiles for everything! You guys rock!!

Steven Henry (Source: Google)


I have been coming in for about 9 months now for my Invisalign treatment and I couldn’t be happier!! They have a super friendly staff and welcoming office. Dr. Nguyen helped me the whole way through, with questions and concerns, he is great. Would highly recommend!!!

Ryan Hammond (Source: Google)


This place is the best! Dr Mark is very professional and knows exactly what needs to be done to keep your teeth healthy and looking good. Everyone I have been in contact with, especially Stephanie, at OC Healthy Smiles are top-notch!

Erick C. from Costa Mesa, CA (Source: Yelp)


I have been going here since 2015 and I feel like Dr. Nguyen and the OC Healthy Smiles team has always done a good job of helping me take care of my oral health and explaining to me what I need. There was a small period where I was going to a different dental office due to insurance reasons but I switched back over here as soon as I could because of the trust and peace of mind that comes from going here. They really take the time to make sure you are taking care of and walk you through procedures and payment options. Highly recommend!

Brandon Godbolt (Source: Facebook)


I love my dentist office so far. I am new to the area and really feel like I lucked out in finding this dental office. I started with them a month ago for a consultation for Invisalign. I am happy to say I found my dentist while I live in Orange County!

Viv H. from Orange County, CA (Source: Yelp)


I had a MAJOR dental emergency last month after my daughter accidentally headbutted me in the face.  I called the office completely freaking out.  Dr. Nguyen actually came in ON HIS DAY OFF and worked on my tooth to relieve the pain, prescribed antibiotics and much-needed pain relievers.  I was in so much pain and don’t know what I would have done if he had not seen me that day.  He then made an emergency appointment with the root canal doctor and I got in the very next day.  Dr. Nguyen saw me shortly after my procedure and I got a new crown put in as if nothing happened.    I can’t thank this office enough for the top-notch service.

Marisol M. from Whittier, CA (Source: Yelp)


Out of all the dentist places I have gone to this is the best. They have all taken good care of my needs and concern. They work with you on payments and very nice. The ladies there are the best. My teeth are looking great and getting ready for the wedding. Thank you to everyone for making me feel comfortable and not panic.

Alley T. from Long Beach, CA (Source: Yelp)


Super friendly staff and they make sure you feel comfortable and all your concerns and questions are addressed. They offer a blanket and essential oils to help make your. Is it even better!

Rachel J. from Los Angeles, CA (Source: Yelp)


I normally don’t write reviews but I felt like I needed to share my experience. I’ve been visiting this office for the past year and a half. Prior to becoming a patient, I hadn’t visited the dentist for a few years. I’ve had a lot of bad experiences including pain during the exam. (My teeth are very sensitive) I explained my concerns and anxiety during my first visit. They listened and have been amazing ever since. They do everything to make my visit comfortable and everyone in this office is extremely nice and helpful.  I never have to worry about long wait times and everyone there has been professional at all times. Writing this review for that person who hates going to the dentist due to painful and uncomfortable experiences. Please don’t hesitate, this office is amazing! I went from going to the dentist every few years to every 6 months.

Joshua F. from San Francisco, CA (Source: Yelp)


The teeth whitening process was phenomenal!  This was my first teeth whitening, and Ivette walked me through the simple and pain-free experience.  Looking forward to more.

Lisa V. from Brea, CA (Source: Yelp)


This office is superb! Everyone is extremely helpful and so nice. They definitely changed my view of a dental office and I doubt I would be able to switch dentists! They always seem to be running some sort of community event where you can help make the community better and this really enhances the whole experience at this office. My daughter is fine coming with me because they have free wifi and a phone charger in the waiting room. Now I just have to get her in for an appointment. Thanks to all the dentist and staff. You guys rock!

Steven Hill (Source: Facebook)


I have been coming in for about 9 months now for my Invisalign treatment and I couldn’t be happier!! They have a super friendly staff and a welcoming office!! Dr. Nguyen helped me the whole way through, with questions and concerns, he is great! Would highly recommend!!!

Kelly H. from Costa Mesa, CA(Source: Yelp)


I’ve been coming here for a few years now. I have had some old fillings replaced and a crown done. They are always attentive and do a great job making me feel comfortable and ensuring I know what is going on. I love the text appointment reminders as well as the follow-up calls from the dentist after treatment to make sure I am doing good. Best dentist!

Rohan Jain (Source: Facebook)


(…)  They only suggest the treatment that you need and have some of the best pricing. The equipment is state of the art, and the dentist has time for you. He listens to you and explains clearly how to improve your dental hygiene. The hygienists are very cheerful and professional. Not one complained about my bad breath, so that’s good haha.

Darius S. from Long Island City, NY (Source: Yelp)


Currently doing Invisalign treatment there and everything has been going very well. It was worth doing the trip from Redondo Beach. Doctor Nguyen is great and, Patricia also was great and helpful. I can’t wait for the final results but so far, YES, I definitely recommend this office.

Jaime Danon (Source: Google)


Dr. Nguyen is awesome!! First time going to a dentist who doesn’t tell me I need to fix a million problems. He is quick but thorough. The hygienist Stephanie was so friendly and kind, it was fun getting my teeth cleaned! Also, the office has all the latest technology which is refreshing. Check out this office-you’ll be glad you did.

Barbara de Souza (Source: Google)


I have been going to Dr Nguyen for many years. The level of dental care is the highest. The latest innovation in technology and treatments is always available. The personal culture of care and interaction with each patient make visits a delight.


A native of Orange County, Dr. Mark K. Nguyen earned his Doctorate of Dental Surgery at the world-renowned New York University College of Dentistry and is licensed to practice in both California and Nevada. After a general practice residency at the Loma Linda VA Hospital, Invisalign certification, and a clinical concentration program in cosmetic dentistry, Dr. Nguyen is uniquely qualified to create beautiful and healthy smiles. Dr. Nguyen's true passion for Dentistry is exemplified by his participation in continuing education that far exceeds requirements to maintain a dental license. Dr. Nguyen is a past and current member of the American Academy of Cosmetic Dentistry, Academy of General Dentistry, American Academy of Implant Dentistry, and the California Dental Association. When not in the office, Dr. Nguyen enjoys spending time with his family and friends. Dr. Nguyen and his wife, Lindsay, are avid outdoor enthusiasts and usually spend their Sunday mornings surfing or biking.