Cook Orthodontics
Debra Cook, DDS, MS:
Practice Profile Page


Cook Orthodontics
Debra F. Cook, DDS, MS (Orthodontist)

Rancho Santa Margarita, CA













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


Clear aligners


Comprehensive orthodontics

Space maintainers

Palatal expanders


Interceptive orthodontics


Offers Even28 at-home™? No

Offers Even28 at-dentist™? No

Offers Invisalign®? Yes


Monday: 8:30 am to 5:00 pm

Tuesday: 8:30 am to 5:00 pm

Wednesday: 8:30 am to 5:00 pm

Thursday: 8:30 am to 5:00 pm

Friday: 8:30 am to 5:00 pm (by appointment only)

Saturday: Closed

Sunday: Closed





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

Christina T. from Rancho Santa Margarita, CA (Source: Yelp)


The most amazing office and staff! We’ve had 3 appointments so far getting my 11 year old son started and I could not have asked for a more kind, professional, and efficient experience.  My son asks me every week when his next appointment is. I love that they explain everything in such detail and make my son feel so included and informed. Dr. Cook, Kristen, Vivien, and Kim have really have set the bar high. Very happy we chose them!

JoAnn Bradley (Source: Google)


Dr. Cook and her staff are absolutely amazing! Dr. Cook made our son feel so comfortable and made everything such an easy transition. Never thought that getting braces for our son would be such a wonderful experience but that’s exactly what it’s like to be in the hands of Dr. Cook and her staff! They rise above and beyond perfection! Thank you so much for transforming our sons smile!

Michele Levine (Source: Facebook)


We are about half way through our daughters orthodontic care with Dr. Cook and staff. I have had nothing but the most positive experience with this office from my first call for a consultation. Dr. Cook is not only a fabulous and extremely knowledgeable orthodontist, but she is a wonderful human! Her staff is equally as warm, friendly and efficient. We never wait long, appointments are easy to make, I LOVE this office!!!

Ben D. from San Francisco, CA  (Source: Yelp)


This office is extremely friendly and knowledgeable. Besides remembering a surprising amount about me from the initial visit, I felt like they all went out of their way to make my visit comfortable and as fast as possible. Dr Cook showed me how my teeth were lining up (or not), and explained how everything would eventually settle. I felt like I was given all the information, options, and fees up front, and was able to decide how I wanted to continue. Before ei left, they explained all the care I needed, and how to get ahold of them, should any issues arise. I felt like I got VIP treatment, and I suspect that’s how every patient feels. Ten out of ten, would recommend.

Christine Leonard (Source: Google)


Dr. Cook is amazing and so is all her staff! She is trustworthy, friendly, has a great rapport with her patients, and extremely knowledgeable and competent at her craft. She has done braces on both my boys and I have done invisalign through her. I have recommended her over and over to friends who all love her also. If you need braces or if you are just shopping around, go see Dr. Cook and her staff!.

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


This place is awesome!  It is not our Orthodontist but they helped me out.  My son just got braces on the Wednesday before Memorial Weekend.  His Doctors office closed on the Thursday before the weekend and he had a wire that had “shifted”.  I have no idea how to move it even though they gave me a detailed packet with instructions on how to move it if it does which I cannot follow.  My kid was miserable, I needed to get him relief.  The emergency # said they couldn’t get to us until 1pm Thursday try telling a moody 13 year old boy he has to suffer a little longer..couldn’t have it..drove around and found a dental office, told the lady about my situation and she referred me to Cook Orthodontics.  I called them, they could hear the desperation in my voice and told me to come on in.  We were there in 5 min and they cut the wire that was digging into my sons cheek causing a huge sore.  Either way, he was ecstatic it was better and happy, which makes Mama happy. They didn’t even charge me.  They were the nicest ladies and if we didn’t already have a Orthodontist for my son, I would come here.  Super nice decor and very clean.  Thank you!

Jenny N. from Mission Viejo, CA (Source: Yelp)


We love, love, love Dr Debra Cook! She is so sweet and kind hearted, it’s a real treat to see her for my sons orthodontic care. She is wonderful with kids and has a real passion for what she does and it shows! The office is always decorated in fun, festive ways. I must say my son looks forward to his orthodontic visits, not to mention the sugar-free gum she has out for her patients! We have seen amazing changes in my sons teeth already and it’s only been a few months. His self esteem is going up, and Dr Cook always makes him feel special when he’s there. We truly adore this Orthodontist, she is one of a kind!!!!

Melvin Cohen (Source: Google)


I have known Dr Cook for many years and have referred numerous patients to her. She provides the highest quality orthodontics to children and adults in a friendly family oriented environment. The young patients and the adults I have referred to her have all had good experiences and most importantly have finished their treatment with beautiful smiles for the rest of their lives. Dr Cook has excellent training and experience. I recommend her for all your families orthodontic needs without reservation.

Hasnain Rizvi (Source: Google)


I have been coming to Dr. Cook’s office for a few months now for my Invisalign treatment. I have been very satisfied with the results of my Invisalign thus far. Dr. Cook and her staff have been incredibly nice and helpful every time I have gone in for a visit. I would highly recommend her office for braces or Invisalign.

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


We are on our second child so far with Dr Cook. We love the office staff and the way Dr Cook is with not only our kids, but with us as parents. She take time to make sure you know what’s going on at all times. She actually really cares about the outcome of what she’s doing with your kids teeth. We have a few more kids in the pipeline to get braces and will only being going to Dr Cook’s. Thank you for everything

Rhonda L. from Mission Viejo, CA (Source: Yelp)


Exceptional service. Had bottom braces placed because I didn’t wear my retainer. Yes Mom I am admitting that I should of wore my retainer. As a adult wanted my teeth straight. Dr Cook and her staff worked with me throughout the process. I am a nervous Nellie. So happy with the results.  I hope that adults read this review and give Dr Cook’s office a call. 5

Khasi Dar Mighat (Source: Google)


Dr. Cook is the most caring and friendliest Dentist-Orthodontist I have ever been with. I came to her when I was not happy with the progress of my Ortho case with another doctor. She reviewed my condition, spent a long time explaining several options I had, and helped me to choose the most effective and economical solution to get my beautiful smile I always wish to have. Dr. C. Thank you so much. I always remember you when I smile 🙂

Lauren S. from Whittier, CA (Source: Yelp)


My daughter just got her braces on today, and I am SO pleased with Dr. Cook and all of her staff! Dr. Cook was incredibly thorough in her assessment of my daughters teeth and establishing a plan for treatment (the most thorough out of the 3 offices we visited). She was so kind to my daughter and was able to relate to her on a personal level (softball). I couldn’t be happier with our experience this far!

Ryan L. from Moreno Valley, CA (Source: Yelp)


Dr. Cook took the time to really think out the treatment plan for my son. All of the staff are very friendly and upbeat. Vivien and Jody both have worked on my son and he absolutely was comfortable and a happy kid. Dr. Cook kept me very informed as to what treatment and offered another option also if I was uncomfortable with her suggestion. It was very nice to be kept in the loop and talked with about my child’s orthodontic plan!

Megan B. from Mission Viejo, CA (Source: Yelp)


5 stars without a doubt!!! Dr Cook is the best!! She cares about all her patients. She’s so kind and friendly and happy. Her office is so beautiful and clean. If you want a doctor who’s truly passionate about what she does this is the place to go. She so rad with the kids and she leaves no detail about her job half ass. She makes sure your mouth is perfection. Easy scheduling and her staff is amazing. You won’t be disappointed!!

Kimberley Hart (Source: Facebook)


Wish I could give them 100 stars!! Can not be happier with the care we have received. Dr. Cook and her entire staff are so gentle, kind and do amazing work!!!! My son was treated and now my daughter is getting her braces on. After seeing numerous orthodontists in south Orange County I know for sure that we going the best

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


LOVE Dr. Cook!!! I’m an adult, just finished my braces and I am thrilled!! My outcome was better than I thought possible. Straight teeth and no overbite! Dr. Cook is a talented orthodontist with a keen eye for detail. My son also had a fantastic result with Dr. Cook for Invisalign. We interviewed several community orthodontists before selecting Dr. Cook, from initial consultation to final product she exceeded all expectations! Besides being an amazing practitioner she is a wonderful person- sincere, kind and patient. The entire staff is phenomenal. I actually look forward to my appointments -the office is so pleasant! Appointments are timely which is important given my demanding work schedule. If your family needs an orthodontist, go and see Dr. Cook. You will thank me later!!

Roxann H. from Mission Viejo, CA (Source: Yelp)


The whole staff at Cook Orthodontics is the reason why I have had both of my sons go there for their braces. They are all kind, loving and very personable. I always feel my kids are getting the very best of care there. The office goes above and beyond. When looking for an orthodontist I interviewed 4 different ones, Dr.Cook was the furthest from our home but it’s been worth the drive. Twice I have needed emergency attention for my boys and my call was answered right away. They are caring, thorough, always keep their patients best interests at the forefront and I wholeheartedly recommend this orthodontist.

D. C. (Source: Google)


Dr. Cook and her staff, from Melanie in the front office, to every single dental hygienist is outstanding. I rarely write reviews yet had too. Ive never had such an amazing experience at any Orthodontist/dentist/doctors office, EVER! Dr. Cook and her staff go above and beyond to explain their short/long-term goals to each parent and patient and make what can be a complicated process, easy to understand. They thoroughly explain what they are going to do verbally and at same time, visually, by using pictures they took of my sons teeth, in combination w their programs. This was extremely helpful and showed a clear path to beautiful teeth. The combination of technology, knowledge, willingness to ensure each patient / parent clearly understands the process, in addition to their genuine compassion, kindness, concerns, all results in a combination and experience that allows their true passion for what they have each chosen to do for living, really shine through! This makes them shine like the rare gems they all are! I believe Dr. Cook and her staff are w/out a doubt one of the best Orthodontist offices in Orange County. Thank you for your on going support and for you all being you!!

Debbie B. from Trabuco Canyon, CA (Source: Yelp)


Dr. Cook is absolutely amazing, as well as her entire staff! I can’t say enough good things about Cook Orthodontics! Everyone there is so kind and caring. I have had my twins both in braces and one just got them off today. They look fantastic and the change that took place wearing them less than a year is incredible. I highly recommend using Dr. Cook for your orthodontist!

Teri C. from Foothill Ranch, CA (Source: Yelp)


We first visited Dr Cook about 3 yrs ago for our oldest daughter and son. After 2 other consults with other orthodontists the kids decided they were most comfortable with her (and so was I!) she is always so warm and welcoming, the staff helpful and kind. Always sure to explain exactly what’s happening and answer any questions. The new office is super nice, in a great location with lots of parking. Very inviting. Older two kids results were wonderful! The youngest gets her braces next week and is excited. Not only is Dr Cook super nice, but the overall pricing is very fair as well. Double score! We have recommended lots of friends to her and intend on in the future. Thank you Dr Cook and staff!!

Kimberly Burke Titus (Source: Facebook)


We are on day 1 of braces and an expander with our 8 year old. We have had 4 appointments so far. Each has been wonderful. Our little guy was very apprehensive about getting braces. Every person in the office has been so kind. They have put his mind (and mine) at ease.

Doug Stark (Source: Google)


I was very hesitant to have braces put on in my 50’s , but Dr Cook made the whole experience very easy with a combination of clear braces and awesome fast results. She’s a bit of a perfectionist and her attention to detail paid off just last week when my braces were removed and revealed a beautiful, straight smile. Very happy…thanks Dr Cook!

Anonymous (Source: Google)


when my first had to get braces we searched several places and everyone was pushy and offering ortho care she did not need. Then a friend of ours recommended Dr. Cooks office. When we showed up we were greeted by the staff who were friendly and extremely helpful. You can really tell that everyone who works there loves what they do, and this shows from the minute you walk in until your appointment is done. There is never a time we don’t feel welcomed or that they are taking advantage of patients. We moved away since our first kid went here, but drive the distance for our second one to go. It’s worth it :)!!!!

Eva K. from Rancho Santa Margarita, CA (Source: Yelp)


We have been coming to Dr. Cook for years, my daughter had phase one and now phase two. We already referred three friends here and they all love it as well. Dr. Cook is courteous, friendly and always addresses our concerns or questions thoroughly. Her office staff is fabulous as well, friendly, welcoming and very accommodating and everyone in the office always takes their time with us. We never feel like we are just another client being rushed in and out! I would absolutely recommend this office!!!

Lynda F. from Irvine, CA (Source: Yelp)


I have been going to Dr. Cook now for several years either for myself or for one of my children. She is such an amazing doctor. She is kind, gentle, caring and a perfectionist when it comes to your smile. Her bed side manner is second to none. She makes a time that could possibly be anxious for some easy to get through. My daughter has had a long treatment plan with braces. I couldn’t image anyone else taking care of her. I trust Dr. Cook completely and would recommend her without hesitation to any age group!

Jody S. from San Clemente, CA (Source: Yelp)


I wanted to give a shout out to an amazing Orthodontic office in Rancho Santa Margarita. Let me tell you about my experience at the office of Dr. Debra Cook. I have a son who is 8 years old. He has had some trauma to his front teeth with an accident, and I noticed he has a lot of spaces between his teeth and his speech was a little challenged. I wondered if this might have anything to do with his teeth. I thought it was time to go see a specialist in orthodontics. I made an appointment with Dr. Cook and from the initial phone call to the visit itself I felt very cared for by the Doctor and her amazing staff. Well, my son did need some orthodontic treatment, and Dr. Cook was so thorough in her explanation of the problems and her recommendation for his care. I then met with her financial coordinator and she gave me all the information about the cost and payment plans they offered and answered all my questions about appointments needed and when I left I had a report from the Doctor with the cutest picture of my son on it outlining the treatment recommendations so I could talk to my son’s Dad about the care plus all the financial information with everything included, so no surprises later. I would highly recommend Dr. Debra Cook as your orthodontist because she makes all the patients feel so cared about with her loving demeanor and other mom’s whom have seen her also tell me she does beautiful work. My son is well on his way to a “Super Smile”!!!

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


We love Cook orthodontics. I had Invisalign and my son had traditional braces and we have both been so happy with our results. Now, my daughter started her braces today. The staff is awesome. They are friendly and helpful. And Dr. Cook is so sweet and really cares about each patient. We highly recommend!

Erin Macdonald  (Source: Facebook)


Dr. Cook is not only an amazing orthodontist but a warm, caring, and friendly person! Our experience has been great and we are so glad that we will continue to see her in the future. Highly recommend her for your orthodontist!

Carna Ahmadzai (Source: Facebook)


Dr. Cook and staff are the nicest people ever! Dr. Cook is very knowledgeable and within 2 months you can see how her treatment plan has already improved my daughters smile! The office staff are extremely nice and helpful and take their time explaining each treatment plan to you. Thanks Dr. Cook & Staff!! YOU ROCK!!

Jen C. from Trabuco Canyon, CA (Source: Yelp)


We love Dr. Cook, we are on our third round of braces with her (phase 1 and 2 for one of my kids and phase 1 for another) and are so happy with the results. When we first were thinking about orthodontic treatment, I was going to get 3 opinions and pick the practice where I felt most comfortable. Dr. Cook’s office was the first place we visited and within minutes of meeting her, I knew we wouldn’t need to go anywhere else!  I signed a contract that day and have never looked back! Not only are the results fantastic, Dr. Cook and her staff are so friendly and accommodating. I always refer her to anyone looking for orthodontic care because I wouldn’t take my kids anywhere else.

Carol R. from Rancho Santa Margarita, CA (Source: Yelp)


Cook Orthodontics staff are all wonderful and professional! My son just had his braces removed and they look great! The process was made easier by the kind caring team. Dr. Cook does excellent work and presented it all to us clearly every step of the way. Braces can be painful and my son was made to feel as comfortable as possible. I appreciated all the extras the team provided.

Annette K. Stelter (Source: Facebook)


Kate had a fantastic results under the care of Dr. Cook. We are pleased with the functionality and the beautiful ethics of the final phase. RSM is blessed to have this talented orthodontist in our community. Thank you Dr. Cook and her team!

Holly R. from Foothill Ranch, CA (Source: Yelp)


We visited Dr. Cook on a recommendation from our dentist. Our children both need braces and we planned on shopping around before choosing an Orthodontist. Dr. Cook and her staff blew us away with their friendly and compassionate approach. We were also pleased to be told our children would be needing LESS work than originally thought. We will be sending our friends and family to Dr. Cook!

Marianne P. from Lake Forest, CA (Source: Yelp)


My dentist recommended Dr. Cook for my oldest son. I chose her for her location but it overwhelmingly became because of her professionalism, caring attitude and my son was really comfortable with her. The best decision EVER! I love how she treats everyone like family. Her staff, Jodi and Vivian, are excellent as well. My youngest son just finished his phase 2 of braces which ends my 7 year relationship with her over multiple kids. Very pleased from beginning to end. Highly recommend!


Cook Orthodontics is proud to be your local Rancho Santa Margarita orthodontist practice where Dr. Cook offers comprehensive orthodontic care for children, teens and adults throughout Coto de Caza, Ladera Ranch, Mission Viejo, Foothill Ranch and Trabuco Canyon, CA. At Cook Orthodontics, Dr. Cook and her team work to provide a comfortable, stress-free environment where you can enjoy personalized service and exceptional results. I completed my undergraduate work in Biology at California State University, San Bernardino. I received my D.D.S. degree from Loma Linda University School of Dentistry, graduating at the top of my class and distinguishing myself as a recipient of the California Dental Association Scholarship Award and as one of only a handful to be selected to Omicron Kappa Upsilon (Phi Beta Kappa). I then received my Master of Science degree and specialty in Orthodontics from Loma Linda University. I am a member of many orthodontic/dental societies, which include: American Association of Orthodontists (AAO), Pacific Coast Society of Orthodontists (PCSO), California Association of Orthodontists (CAO), Orange County Dental Society (OCDS), California Dental Association (CDA), American Dental Association (ADA), Academy of Laser Dentistry (ALD) and the Academy for Orthodontic Excellence (AOE) study club in Orange County. Being an Orthodontist is a fun adventure! I Love the challenge of fitting teeth together and getting to know the people behind the smiles! When you have an appointment at our office, I make sure to give you my undivided attention to go over all your questions and give you the very best treatment. In my spare time, I enjoy being with my husband Rick, and our two girls (Justine and Josie). You can usually find our family out on the driving range, softball fields or on long walks with our English Lab, Bubba.