Empresa Dental
Derek Nguy, DDS:
Practice Profile Page


Empresa Dental
T. Derek Nguy, DDS
Rancho Santa Margarita, CA













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

Dental cleaning

White fillings


Inlays & onlays


Clear aligners

Porcelain veneers

Teeth whitening

Tooth extraction

Root canal treatment

Dentures & partials

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 5:00 pm

Wednesday: 8:00 am to 5:00 pm

Thursday: 8:00 am to 5:00 pm

Friday: 8:00 am to 4:00 pm

Saturday: Closed

Sunday: Closed





Check out what some happy patients are saying about us:

Kimberly W. from Rancho Santa Margarita, CA (Source: Yelp)


Hi my name is Kimberly and when I was young I was traumatized by a dentist that unfortunately stayed with me into my adulthood.  It is extremely hard, wait did I say extremely hard, I meant to say EXTREMELY HARD for me to have a needle stuck in my mouth without feeling like I am going to faint.  I have been going to this same office for over 25 years and I see JoEllen for my teeth cleaning (SHE IS AMAZING) and I have obviously gotten to know the team very well and have built up a trust knowing they will do EVERY thing they can to make sure I am as comfortable as I can be before they even begin any procedure.   Well as you may know the dentist there for the past years (not sure how many) retired.  This was a dentist I TRUSTED and he knew how hard it was for me to have dental work but he promised he would not hurt me and he kept that promise, which made it possible for me to easily go in and have fillings, veneers, crowns, etc done.  OK moving forward to today.  I woke up and realized I broke a tooth, well the veneer on my tooth broke off part way and I would need to have it fixed which meant having to have a shot in my mouth.  I had only met 1 of the 2 new dentist there once and it was only because I was having JoEllen clean my teeth and he checked them afterwards.  He was very very nice but today I would have to let someone I did not know or trust whatsoever put a needle in my mouth and do a procedure.  Let’s just say I WAS A MESS!!!!!!!!!  I know this is a long review but this one is IMPORTANT TO SHARE.  I actually was given the shots by Dr. Derek did the procedure.  THEY WERE SO AMAZING!!!!!!!!!!!!!!  I did not feel a thing!!!!!!!!!! They were so gentle and kind and caring and I can’t say THANK YOU enough for putting up with my extreme anxiety today.  I am so thankful for both of you.  Thank you Jennifer and Alex and to my rock, JoEllen, you are the best!!!!!!!!!  I have to go back in 2 weeks to have the permanent veneer put on but I feel no anxiety whatsoever.  I TRUST both of the Dr.’s and I am so thankful for them.

Nicholas C. from Riverside, CA (Source: Yelp)


I have been seeing Dr. Derick for the last 4 years dating back from his old office. I drive a good hour to see him. If I didn’t trust him I wouldn’t make the hour drive. He is GREAT, the front counter staff and especially Joellen. Joellen does a fantastic job cleaning my teeth. She pays a great attention to detail and is very concerned for patient health. This is what separates herself from other hygienist. Thank you for all your advise it really does play a factor in my daily hygiene. See you at my next appointment!

Ashley W. from Orange County, CA (Source: Yelp)


The best dental team around!! I’ve been coming here for as long as I can remember (went next door as a kid), and they are amazing. Clean, friendly, helpful and efficient! Good dentists and offices can be hard to come by, but I promise you won’t be disappointed with their services and kindness. Front desk is ALWAYS so nice and accommodating.

Esteban Silva (Source: Google)


Dr. Ngo, Alex, Karen, and Chelsea are incredible members of this remarkable staff! They treat clients with incredible attitudes, smiles, and upbeat personalities that will make anybody with a sour dental experience love getting their teeth worked on by this professional staff.

Lisa L. from Laguna Hills, CA (Source: Yelp)


First of all, my whole family goes to this dentist office. My mother-in-law, father-in-law, husband, four-year-old son, and myself. The doctor and staff make it possible for our entire family to to have healthy teeth even if that includes babysitting!

Raleigh E. from Corona, CA (Source: Yelp)


I used to see Dr. Derek at a previous office and went a couple years not liking the revolving door of dentists at his old office. I went out of my way to find him at his new practice.  He’s 35 miles from my home and am so happy to call him my dentist again. If you’re looking for a dentist willing to go the extra mile for you and one that will do what’s best for the patient then he’s your guy.  The staff is incredibly helpful and thoughtful.  Thanks for everything Empresa Dental.

Jim W. from Newport Beach, CA (Source: Yelp)


Great service. Very nice office. Dentist are careful when working and make sure you are comfortable. The hygienist was very detailed during my cleaning. Overall great dental experience.

Sue O. fromBeverly Hills, CA (Source: Yelp)


These guys are the rockstars of dentistry. My bite is the best it has been with my new “diamond like” crowns. The office staff is great at explaining benefits and copays, upfront, and both hygienists do an excellent job keeping me cleaned. Go here, watch some TV and come out with great teeth. Even my MD was impressed when she asked me to say, “Ahh.”.

Alyssa H. from Culver City, CA (Source: Yelp)


This was the most pleasant visit I’ve ever had at a dental office.  The staff are warm, friendly, and professional.  The service was exceptional.  Dr. Derick was genuine, thorough, and very knowledgeable.  He took his time to explain my dental needs and answered all my questions/concerns.  Highly recommended.

Victoria M. from Mission Viejo, CA (Source: Yelp)


I cannot not begin express how amazing my experience was today at Empresa dental.  I have been going to this office for 15 years and have always been impressed with the quality and professionalism.  However, today surpassed all my previous experiences.  I needed a dentist for my husband’s 92 year old father. He was having some pain in his teeth.  Jennifer was able to fit me in the same day.  Everyone was so kind and respectful to him. We were able to work out a treatment plan that fits his limited budget.  Thank you so much Dr. Derek and Jennifer and Chelsea for such a positive experience.

Laura M. from Tempe, AZ (Source: Yelp)


I personally can’t stand the dentist, but they make the experience so comfortable and enjoyable. I never wait long for an appointment, and everyone is very friendly. I have been going here for years, but only recently do I feel as though the personal care is incredible. Wonderful place with a wonderful staff, highly recommend this office!

Manolya E. from Thousand Oaks, CA (Source: Yelp)


They are super nice from the receptionists to the hygienists to the doctor. I saw Dr. Derrick and he was very helpful and informative. He explains everything in good detail and makes sure you are comfortable with anything you might need done. My dental hygienist (Sheryl?) was very gentle and thorough. Overall, I recommend!

Heather N. from Lake Elsinore, CA (Source: Yelp)


Very knowledgeable, gentle, and not interested in selling you things you don’t need.

Had no idea I was a teeth clincher but turns out it is contributing to chronic migraines. I heart them!!!!!

The staff is wonderful too. Helpful and interested. They get you in and out.

Christina P. from Orange County, CA (Source: Yelp)


I came here for the final step of my implant and was taken such great care of by Dr Derrick. My crown came out fabulous. But a few months later, food was still getting caught between it. I called the office and Dr Derrick called me right away. I came in the next morning and he said he would take some X-rays and talk to the lab to see if they could fix it. They could! So two weeks later it came back. He got it all adjusted and it felt much better and tighter. I called later that day after I ate lunch and excitedly told Jennifer that no food got caught!  It’s always such a great experience here. Dr Derrick is so wonderful and his dedication to patients happiness is amazing.

Katy Ducale Yarter (Source: Facebook)


I love going here! They are the best! My family and friends all go here! They take care of you!

Sherae Brinkle Williams (Source: Facebook)


These dentists, hygienists, and office staff treat you like family!!! Excellent skills, ease your fears and discomforts!! Can not recommend them enough!!!!!!

Genalyn S. from Corona, CA (Source: Yelp)


Like most, I avoided the dentist because of fear of pain. I was proven wrong!!
From the time I entered the staff was friendly and professional. Alex was very gentle with her care and Dr. Derik was thorough and explained everything clearly regarding my dental needs. The hygienist Shelly was also great and really took her time making my teeth and gums feel amazing.
I highly recommend going here!! You will be well taken care of!!

Doug (Source: Google)


Empresa Dental and Dr Derick were recommended to me by a friend for a second opinion. I felt right at home there and very impressed with what I was told. My treatment has been completed and I couldn’t be more happy. Dr Derick was professional, friendly and very knowledgeable. I wasn’t sold something I didn’t need. I am more pleased than expected and highly recommend them to anyone with any dental needs.
Thanks guys!!

Jeannefer P. from Santa Ana, CA (Source: Yelp)


Dr. Nguy is a life saver! He did an extraction for me because I was in so much pain. I was scared at first but I was in and out of there pretty fast. I thought it would be painful after everything wore off but it wasn’t that bad. The staff are very welcoming, friendly, and very gentle. I believe this was the best dental experience I’ve ever had.

Bryan M. from Chandler, AZ (Source: Yelp)


I can honestly say I am extremely pleased with this office and everyone that works there!  
I have moved across the country and was a very big fan of my dentist back home for 20+ years.
After a few new dentists in between my moves, I have finally found my new office here at Empressa Dental.  
They have accommodated me not only as a new patient but with a few emergency needs as well.
They are very detailed, friendly and make sure they take the best care possible.
My wife is also going here and was very pleased as well.
Thank you for the great care and fair prices!!!
We are thrilled to be patients here and I recommend them to anyone looking for a great dentist that cares and will take excellent care of you!

Rachael S. from La Jolla, CA (Source: Yelp)


Everyone from reception to hygienists to the doctors are always so sweet and gentle. They make dentist appointments a breeze no matter if it’s a cleaning or extensive dental work. They are definitely going to be my go to for all my dental work in the future! Thank you Empresa!

Connie Oftedahl (Source: Google)


Very nice staff. Appointments are on time. Dr Derrick is very kind and truly cares about his patients. I would recommend him to all my family and friends

Pat O'Connor (Source: Google)


I had bonding placed at this office last week; and despite having other work done there in the past, I really was newly impressed with the skill, demeanor, respect and caring exhibited by the doctors.

I can’t express my appreciation enough.

Very, very appreciatively,

Mary Murakoshi (Source: Facebook)


The team is awesome! Very good professionals and customer service!

Sam J. from Irvine, CA (Source: Yelp)


So everyone hates going to the Dentist right? Well not anymore!!! I have had a wonderful experience with this office. My old dentist recently passed away and I was referred to Dr. Derick by several friends of mine so I thought I would give them a try. They are awesome. They take their time and explain everything before they do it. They have wonderful technology and put your pictures and x-rays on a flat screen in front of your chair so you can see exactly what their talking about and what they are doing. They are fast and efficient and they never try to up-sell me. I feel totally comfortable with both of them and the staff is warm and friendly. They remember everything about my last conversations with them. They ask about my family and just seem to really care. I had my first deep cleaning with Shelley and it was amazing! She took 3 appointments and 4 hours to complete it. It was the most thorough cleaning I have ever had and I was blown away. She was gentle and gave me great information. She taught me how to floss properly and i have seen a huge improvement in my gums and teeth ever since. I found a winner here and I am hooked. I don’t write many reviews but after my appointment this week, i felt compelled to share my experience. 5 stars all the way. Thank you Dr!!!

Caitlen S. from Lake Elsinore, CA (Source: Yelp)


I had a filling break out of nowhere I was in a lot of pain. The doctor and staff were so nice and helpful! They got me in right away, rushed to get me out of pain and were gentle as can be. The staff actually cared how I was feeling and that me feel even better. The Dr was knowledgeable and completely honest with me. No run around just black and white. I highly recommend you give them a try.

Jeff S. from Ladera Ranch, CA (Source: Yelp)


I’ve been going to Empresa Dental for about 10 years now, the staff has always been great! Now, it’s even better under new ownership. The new dentists are very personable, professional, and tech savvy which makes the experience understandable and efficient! Would refer anyone to Empresa Dental.

Alex L. from Costa Mesa, CA (Source: Yelp)


Came here for a check up and cleaning. Office staff was super nice and friendly. The dental hygienist who worked on my teeth did an excellent job. One of the thing noticed was that even though they seem pretty busy, there wasn’t a whole bunch of people waiting in the waiting room. This shows that they manage their time appropriately and they schedule patients appropriately. It’s important to know that your time is as valuable to them as it is to you. Definitely will come back again.

Aaron G. from Trabuco Canyon, CA (Source: Yelp)


Been coming here for over 5-6 years now. Never one bad experience. Great people and great service inside and out!

Ken A. from Coto de Caza, CA (Source: Yelp)


Dr. Nguy is my primary doctor since Empresa Dental opened and I am 100% satisfied every time I come in for my 6 month check up and cleaning. They do a very thorough job, in fact when examining my wife they discovered a lump on her throat, they highly recommended she get it checked out and sadly it was thyroid cancer, thankfully it was caught early enough that surgery was solution. And she is now cancer free! Thank you for saving my wife!!

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


I’ve been through a few dentists over the last 12 years living in RSM and I’m so happy I found Empresa Dental! I’ve been going now over the last year. They are wonderful and take such fabulous care of their patients! Every single person who works here is great! Go book an appointment!

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


Been going here for many many years now and the staff is so wonderful! No matter if you’re there for filling a cavity or scrapping the tartar off your teeth, they do everything they can to make you comfortable. Definitely a plus that they have individual TV’s at each station. The staff treats you like family and not just another name on the clip board. LOVE THIS PLACE!

Justine D. from Rancho Santa Margarita, CA (Source: Yelp)


Very nice staff!  Dentist was thorough and cordial.  No upselling like other offices. Convenient location.  Hygienist was very knowledgeable and thorough.  She gave me a cleaning that will last a while Very comfortable atmosphere.  Highly recommend if you’re looking for a new dentist.

Ira Globerson (Source: Google)


There is only ONE dental group to use in RSM or nearby communities; Dr Derek!
These guys and their team are true professionals and take a conservative approach to dental care and work. They are not out for a quick buck.
In my late 50’s now and have had many dentist experiences and none have come close to this team. I had multiple crowns and some other work done and never felt pain, plus these Dr’s truly care about their patient’s. They even check in with you in the evening after complicated work is done to make sure you are doing well. Unheard of but very welcome to me! If you need dental work, or even a second opinion, go see these guys!

John Phuong H. from Huntington Beach, CA (Source: Yelp)


I had a great experience here the staff is great and very friendly! Jo Ellen is so nice, she is my hygienist and she has the softest touch, she is definitely helping my get that million dollar smile! Dr. Derick is very informative and was available for all my questions.

I am definitely coming back!


Dr. Derick Nguy is a calm, passionate and caring doctor who prides himself on his ability to provide a peaceful and tranquil environment for his patients and their families. He has built his practice to reflect his serene nature. His passion for technology has fueled his drive to continue to learn and develop a state-of-the-art dental practice with the utmost regard for patient care. He has crafted a technologically advanced office to keep patients at ease and bring forth cutting-edge techniques to create the perfect smile. With a strong dedication to education, he earned his Bachelor of Science degree from the University of California, Irvine. Dr. Derick completed his studies in dentistry at the University of California, Los Angeles in 2005. Dr. Derick is a loving husband and dedicated father to his beautiful daughter. He likes to spend his free time with family and friends, loves good food, and enjoys playing basketball.