We love Dr. Cassidy! I have no problems getting my 9 yr. old son to his monthly visits. Dr. Cassidy built a trusting relationship with him right away. He just makes his families feel welcomed and respected. Very happy to recommend his services. Also had to post my kids favorite shirt to wear when its ortho time!

They are fantastic here. I wish I had more stars to give. Professional, kind, funny -- always smells good in there too! Cant say enough nice things. This is my second kid going her. Just great!

An amazing practice with super friendly people that go above and beyond to make you feel comfortable and welcome. My daughter is very sensitive to anything having to do with her mouth (she doesnt even like the taste of peppermint!) and Dr. Cassidy has been very patient with her throughout her braces journey. Yelena has been so helpful with last minute changes to our schedule and graciously chats with us while we wait. All of my kids love this office so much that they ask me when they can have braces too!

Dr Cassidy is the best orthodontist in town by far. His office is warm, welcoming and really good at their trade. Can’t imagine going through the braces process elsewhere, my kids love him. We highly recommend!

Dr. Cassidy and Yalina are very friendly and accommodating. Appointments are always on time and quick. Were very happy with the results.

I’ve had 3 kids go through the process of braces ranging from an easy case to complicated. Extremely satisfied with the outcome on all. Very easy to schedule appointments and the office never runs late on appointments or keeps you waiting. Dr. Cassidy and Yalina are always available and willing to answer questions or spend extra time if necessary. Very competitive pricing for outstanding patient care. Highly recommend.

A fabulous office! My son’s were patients ofDr. Cassidy when they needed braces so when I decided to get Invisalign I went to Dr Cassidy for my treatment! Wouldn’t go elsewhere! Highly recommend!

Extremely flexible and professional. Always on time and great people.

After moving to Colorado and on the hunt for a new orthodontist we finally found Dr Cassidy. He has made the remainder of my families orthodontist journey an easy one. With the help of his lovely front desk Yalina, you can always count on great conversations, warm welcomes and great smelling candles! You’ll never leave confused about your orthodontic plan. Dr Cassidy is patient and thorough with his work and his explanations, making it easy to understand the steps to get to your perfect smile. It’s a wonderful environment to be in and you are guaranteed to end your journey with a beautiful smile. I couldn’t have asked for a better experience. Thank you!!

After a couple moves, we’ve worked with multiple orthodontists. Dr. Mark Cassidy is by far our favorite. He is kind and explains everything so well. Highly recommend.

Weve worked with Dr Cassidy in our family for over 20 years. Very knowledgeable and passionate about his craft. Recently worked with me on invisalaign during COVID- very safe and clean office/procedures and most of all- simple check ups, pain free process and now straight teeth! A great contributor to our community!!!

Great staff. Amazing Dr. Everyone makes you feel welcome and comfortable!

We have two kiddos in braces from Dr. Cassidy. The process has been great...good communication, easy scheduling, and the price was better than others we checked out. Dr. Cassidy is very knowledgeable and his assistant, Yalina, gets to know everyone who walks in the door and is very helpful. We highly recommend Mark Cassidy Orthodontics!

Dr Cassidy is awesome! Such a caring office, both Yalina and Dr Mark are wonderful to work with. My older boys had their braces done with a different orthodontist that I wasnt happy with, so glad I made the switch to Dr Cassidy for my younger kids.

Dr Cassidy and Yalina run a great dental office. They are very accommodating and professional.. Yalina is the best!Dr Cassidy is patient and explains the treatment throughly. They are both very welcoming and I always get VIP treatment when I bring my kids in!

Great experience!! Dr Cassidy did a wonderful job. Definitely recommend.

Dr Cassidy is wonderful with children, very kind, and Yalina is an amazing asset to the office! We found Dr Cassidy as a referral from our insurance and we recommend him to everyone, Im so glad we decided to chose this office!

Friendly, knowledgeable care, and Mark is a perfectionist - I like that in an orthodontist!

Nicest and easy to work with team!

Excellent service and very professional

Small practice that always gives VIP attention. 2 kids, one with more intensive orthodontic needs, treated successfully. Always professional, warm and welcoming, and recommended highly by other dentists we know as well (which is how we found him). Highly recommend.

Exceptional service exceptional office friendly folk outstanding receptionist friendly doctor very knowledgeable, went to his father had my braces done they have stayed straight over 40 years my daughter loves going here loves how her teeth are coming along we are very happy with this orthodontic office! I highly recommend you check out Mark Cassidy DMD For your orthodontic needs!

We love Dr. Cassidy! He has treated all 3 of my kids. It’s a small practice and he is able to give personal attention to each patient. He takes his time and explains what he is doing so the kids understand. He is kind and compassionate. I highly recommend Dr. Cassidy.

Best Orthodontist ever had my braces on for a while and it never felt like a pain or a headache, any issue I ever had was solved very fast. Yalina made making Appointments were very easy to make and always easy to reschedule if needed. I would recommend this practice to anyone that is looking into or thinking about an Orthodontist.

Dr Cassidy is amazing!!! Him and Yelena are so great with the kiddos, super nice and welcoming!

Dr Cassidy has been wonderful. He has helped me tremendously when my teeth started to shift as an adult. I would recommend him to anyone needing an orthodontist.

Excellent place! Dr. Cassidy as provided excellent service. Yalina has been the best and so friendly. Great communication, wonderful hospitality, and high quality care! Thank you for all you do!

This place is wonderful had all 3 of my boys go here. The workers are great and friendly.

Dr. Cassidy and Yalina are amazing! Waiting to get my braces done at this office was the best decision I have ever made. I would refer them to anyone thinking about getting braces.

Very friendly, professional, organized office that cares about your needs and makes getting orthodontic care easy. I would highly recommend this office, Dr. Cassidy is awesome and best orthodontist around.

Would highly recommend this place!

Dr. Cassidy is terrific. He always puts my son at ease at his appointments and Dr. Cassidys level of service is incredible. We highly recommend him.

We have enjoyed working with Dr. Cassidy and Yalina over the last year! They are a fantastic team. Dr. Cassidy is a kind, gentle man who communicates well what is needed regarding the orthodontic care for our son. He explains things well and keeps us informed of how things are going. Yalina is very friendly and it is quick and easy to schedule appointments and make payments. This is a very family friendly office as well which is important to us.

Dr Cassidy is amazing! I’ve been seeing him for 18 years on and off. I’ve never been disappointed and he does incredible work. The desk woman Yalina is amazing! Very friendly and great at accommodating my schedule. I’ve had nothing but great experiences with them and always refer people to go to see them.

Dr. Cassidy and his staff are absolutely wonderful! We have received excellent care over the years. Dr. Cassidy is knowledgeable and communicates procedures in a kind and clear manner. Our family would recommend Dr. Cassidy to others.

Dr. Cassidy has been terrific. He were recommend to us by my own dentist as we were looking for a second opinion for our son. Our son is currently a patient of his, and we have been very happy with Dr. Cassidy and his friendly staff.

The team here is fantastic. They are great at what they do and are always focused on great customer service. I highly recommend this team when you need a great orthodontist.

My daughter started seeing Dr. Cassidy after receiving rave reviews from my friends and neighbors. He is patient, kind, caring, accommodating and my daughter has always felt very comfortable. She is now in a retainer and has an absolutely lovely smile. Dr. Cassidy and Yalina work very hard to take care of all their patients and it shows. Theyre always so kind and conversational and ready to work with your schedule. We highly recommend Dr. Cassidy. If youre looking for a personalized and caring experience that will make your child feel comfortable you must see Dr. Cassidy.

My two kids are both currently getting their teeth straightened by Dr. Cassidy. I cant say enough good things about him and Yalina and his practice. Dr. Cassidy is a cheerful, fun (at least for us who arent getting the braces adjusted, haha), honest, competent professional who truly cares about doing a great job for his patients, and, for bonus points is easygoing, and easy to talk to. I am truly grateful to have found them and the office with the help of two neighbors who both had great experiences here. Highly recommended!

My two girls have been seeing doctor Cassidy and Yalina for 6 years and I highly recommend them. They both have a welcoming environment and make the process smooth and comfortable.

We moved to Colorado from Brazil and were trying to find an orthodontist who would continue the treatment we had already started. Dr. Cassidy was extremely flexible and the results we had with our oldest were perfect. When it came time for our second to begin treatment, we again chose Dr. Cassidy. We like the fact that he is an honest, sole practitioner with a capable and accommodating assistant. This is not an orthodontics factory. We trust this team and have recommended them to our friends. Highly satisfied!

Dr. Cassidy is a great orthodontist! Both my boys like him a lot, and they feel comfortable around him. Dr. Cassidy is caring, friendly, kind, honest, trustworthy, and very professional! He and his receptionist, Yalina, are very welcoming when you enter their office. They always have smiles on their faces. Dr. Cassidy is very patient and always answers any questions I have. When making appointments, they work with your schedule. We never have to wait long when we go to the appointments. They usually take my boys right in. Dr. Cassidys prices are very reasonable too! I highly recommend Dr. Cassidy if you are looking for an excellent orthodontist!!!

We have been seeing Dr. Cassidy for some time now and every visit is smooth. Yalena answers all my questions she helps with schedule all of my appointments. Dr. Cassidy is always on time! I love this practice.

We love Dr. Cassidy and Yalina! My son has been a patient for almost 5 years. We always look forward to our visits! They are honest, trustworthy, and always take their time with us. Couldn’t be happier with Mark Cassidy orthodontics!

I have had the pleasure of being one of Dr. Cassidys patients for the past couple of years while he was also part-time at the Perfect Teeth in Thornton. The man is an absolute pleasure; a kind, patient man who truly has the best for his patients in mind. The inept overlords at Perfect Teeth have since replace him, and it has immediately deteriorated into an abysmal caricature of a professional medical care facility. It took these incompetent chuckleheads an hour and 40 minutes to remove a couple attachments, snap some photos and take impressions. He is sorely missed, was an absolute boon to my corrective orthodontics needs, an irreplaceable asset to a company that didnt deserve him and an all-around stand up guy. New patients, you are in good hands with Dr. Cassidy!

Amazing people! Dr. Is top notch and front desk lady is super nice and awesome! Huge difference from our previous Orthodontist.

Dr. Cassidy is AWESOME! From the mouth of my teenage daughter, “he’s super chill!” We love the family environment, how accommodating the office staff is and the ease of scheduling appointments. My youngest daughter is going to need braces and Dr. Cassidy will be our first choice!

Both of our children have had their braces done with Dr. Cassidy. Their teeth are beautiful and we had an excellent experience! Great office that always worked with us on scheduling!

Dr. Cassidy is Smart, patient, kind, expert in his trade, and provides free coffee while mamma waits. :)Yalina, front and back office assistant, is always accommodating, welcoming with a smile, top notch!! We have enjoyed visiting this office.

Dr Cassidy is so kind and patient and really goes out of his way to explain every step of the process with you. My son was very nervous about getting braces but Dr Cassidy put him at ease. Yalina is always so welcoming and really makes it easy to accommodate your schedule. Highly recommend!!

I highly recommend Dr. Mark Cassidy if you have any orthodontia needs. I am a current patient of Dr. Cassidys along with my two kids. We have all had orthodontia work: my daughter had braces and is now in retainers, my son is currently in braces, and I did Invisiline and am currently in a retainer. Dr. Cassidy has done a great job with all of us! He is meticulous in his work and truly wants your teeth to look the best they can. He made us all feel at ease with his outstanding bedside manner and great sense of humor. Hes a great conversationalist and when we come back in the next time, he remembers details to ask about. His receptionist/assistant, Yalina, is also outstanding. She is friendly, personable, and always willing to work with you to accommodate your schedule. And she speaks fluent Spanish! We always look forward to our appointments at Dr. Cassidys office!

Both of our kids and myself are currently being treated by Dr. Cassidy. He is an amazing and trustworthy orthodontist. We feel so comfortable with him. He is a kind person who runs his business the way I wish everyone would - with much honesty and integrity. And Yalina, who works the front desk and is Dr. Cassidys orthodontic assistant, is great - she provides a warm and welcoming environment and it always a step ahead of things. They are a dynamic duo!

This is a terrific orthodontic practice! Dr. Cassidy is a competent professional and a sincere man. I looked at other orthodontists offices and they left me feeling like I was a number connected to a check book. Not so here. It might sound hard to believe, but they really do treat you like family. Yalina, Dr. Cassidys assistant, will put a smile on your face after every visit. Weve had two kids treated by Dr. Cassidy and we are highly satisfied. A+!

Professional, friendly, and very courteous. We’ve been coming here for the past 5 years and willingly drive 35 miles each way just to continue seeing Dr. Cassidy.

We love Dr. Cassidy’s office!! Three children and my husband have had braces with amazing results. The office staff are very friendly and welcoming.

Absolutely awesome office! Dr Cassidy is so patient and kind. He has always explained every step of the process to both my children! Always a warm welcome by Yalina! Would definitely refer to Dr.Cassisy

Dr. Cassidy have been amazing for our family! Very professional, kind and thorough! We could not be happier! Also, they great coffee!! Just saying!!

Dr. Cassidy is very kind and thorough. Yalina is the BEST!

This place is great! Staff is very friendly and courtious. And they run on time!

Dr. Cassidy did a fantastic job for both of my sons. Their teeth look great and we always had top-notch service and the friendly upbeat attitude of Dr. Cassidy.

Absolutely love this office!!!

Dr. Cassidy is my favorite orthodonsist of the different ones I had used before, very kind and patient with me, always attentive to any questions I have with my treatment and works very carefully. And Yalina the receptionist is also very nice and friendly. They have a very humane and respectful attention to their patients. 🥰👍💕