Green Lake Orthodontics
Sara Cassidy, DDS:
Practice Profile Page


Green Lake Orthodontics
Sara E. Cassidy, DDS (Orthodontist)

Seattle, WA













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: Closed

Tuesday: 9:30 am to 5:00 pm

Wednesday: 8:30 am to 4:30 pm

Thursday: 8:30 am to 4:30 pm

Friday: Closed

Saturday: Closed

Sunday: Closed


Dr. Sara Cassidy, DDS





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

Mark B. from Seattle, WA (Source: Yelp)


We have nothing but great things to say about everybody at GLO. We initially went there for a second opinion after what we felt was an aggressive treatment plan recommended at another orthodontist practice. Dr Cassidy’s approach was totally different and she recommended we should wait before starting a treatment plan. After three visits and 18 months she recommended now was the time to commence the treatment. This patience meant a lot to us because it reinforced our feeling that Dr Cassidy was making the best treatment plan her prime focus. All of the staff are so friendly and attentive. So far we have dealt with Dr Cassidy, Kailenne and Lauren. Each of them has always made our son feel positive about his treatment and funnily enough he even asked “when can we get started?”. Highly recommended.

Haygwey Fishlick (Source: Google)


Hello readers, I thought it might be interesting for once to hear a review for a kids point of view. After pulling and prying at my teeth for one year i can still say Dr. Cassidy is the most enthusiastic and caring person i have ever met! Every time i went in for a check up or tightening Sara was eager to learn all about my life and really find the best way to make my smile the best it could be. I would recommend GLO orthodontics to anyone! Dr. Cassidy doesn’t disappoint and has so much love in her heart for everyone i truly look up to her, she is inspiring.

Beth S. from Seattle, WA (Source: Yelp)


Dr. Cassidy and her staff are knowledgeable, friendly, accommodating and put me at ease throughout my treatments. I am always greeted with a smile when I arrive for my appointments, and they even allow my dog to accompany me! The office is immaculately clean. I have never had to wait to be seen. They offer little gifts and incentives throughout treatment, which is great fun, a terrific idea, and a lovely way to treat their patients.I would highly recommend them to anyone needing their services..

Shankar J. from Seattle, WA (Source: Yelp)


Recently, I took my son in to see Dr Cassidy for a consultation. She was very professional and thorough. She took the time to explain everything and show us what all of our options were. Their space is amazing! and her staff was very friendly, we both felt very comfortable and relaxed. I highly recommend her if you are looking to have some orthodontic work done for yourself or your children!

Caroline Mark (Source: Google)


I love Sara and crew! I moved to Seattle from Kansas (started invisalign in KS) and had heard that transferring doctors was a huge headache and extremely spendy. After an initial consult, Dr. Sara got back to me with two options – neither of which broke the bank. I transferred to GLO and have been extremely pleased. The office is snazzy and welcoming, but far more significant – Dr. Sara, Kerri, and Kailenne are prompt, incredibly kind, and very competent. *I think it’s also worth mentioning that I have a baby and have showed up to appointments with him twice when a sitter fell through. Normally, I would expect to be told I had to reschedule, but this was not the case at GLO. Kerri actually bounced my baby while I was fitted for a retainer! Not to suggest that GLO is also outfitted as a childcare facility, but really – how nice is that?!

Sabrina N. from Seattle, WA (Source: Yelp)


Dr. Cassidy is ABSOLUTELY WONDERFUL!!!! One of the most knowledgeable, professional, sweet and caring people I have ever met. I was a previous patient of hers and always felt like I was in the best hands. She was always very thorough and approachable when I had questions about my teeth. I definitely recommend anyone who is looking for a orthodontist to see Dr. Cassidy, you won’t regret it!

Jennifer D. from Seattle, WA (Source: Yelp)


My two children just started their orthodontic care with Dr. Sara. I will admit that I was “sold” before our consultation: – Hers was the only ortho website in Seattle not purchased from the same “ortho website sale” all the other orthos in this city appear to use. (You would think they might change up some of the language, but no.) – Her hours work with working parents’ hours. I was shocked at the hours some of these orthos post. One even says in their FAQs, “We cannot guarantee an after-school appointment.” Really? Who is the customer here? It’s already a time and financial investment. Don’t make it more painful and inconvenient. – As a kid, I saw an ortho who was just starting out, and my experience was stellar. Dr. Sara focused first on my kids, greeting them warmly with a handshake and a tour of the office. She made them feel right at home–a decision she may later come to regret. 😉 Dr. Sara has created a beautiful office space. The first appt was very thorough, and I appreciated the fact that she did not immediately sign my kids up for extractions, surgery, braces, etc., and that she did not act like she was on a time frame or mission to get us out of her office, even though it was past 6:30 p.m. (The appt started at 5:30 p.m. I defy you to find an ortho in this city with these hours.) They may need all of these things, but I really valued that she wanted some time to think about options for both kids, and that time to see what happens with less invasive approaches is a possibility for both of them. GLO was the first office we contacted and scheduled an appt. I knew immediately I did not need to interview any others. We are in good hands.

Emily Mcfadden (Source: Google)


I love Dr. Sara and her team! The practice is super high-tech, clean and friendly. It’s like a Mac Store 🙂 The office is always buzzing with good energy. The assistants are great too -Kailenne always does a great job and is very personable. I definitely feel like I’m in good hands. Dr. Sara works closely with my dentist to make sure everything goes smoothly. I definitely recommend GLO.

Marina M. from Mercer Island, WA (Source: Yelp)


Everything about this office is SUPERLATIVE!! Dr. Cassidy is wonderful with both kids and parents.She puts everyone at ease with her joyous personality and clear enthusiasm for her profession After a very thorough evaluation, she explains to both parent and child what the different treatment options are; going over all the pros and cons of each option, She is really thoughtful in giving her advice and wants to make sure that everyone involved in the decision is comfortable and happy with it. Both my daughter and I love coming here…the office is beautiful, light, high-tech,and clean, and the staff equal Dr. Cassidy’s warmth and ebullience. After seeing how well my daughter’s invisalign is going, I too am about to begin my own treatment, since I know I am in great hands!!!

Amy T. from Bellevue, WA (Source: Yelp)


Dr. Sara is a perfectionist, a competent orthodontist who would go out of her way to make sure that her patients get the best care. In addition, She has a great and warm personality. She has been working on my teeth and she has been consistently reliable for the past 1.5 years. If there were any discomfort, she would make sure that she would put an end to it even if it meant scheduling me in during an inopportune time. For all the above reasons, I would trust her with my children’s teeth as well. I highly recommend.

Charles W. from Seattle, WA (Source: Yelp)


I do not write many reviews on Yelp, but Greenlake Orthodontics and Dr. Cassidy deserve one. I started at GLO right before I turned 26 and was unsure of what my insurance would look like in the coming months. The staff was so great during my free consultation and gave me a whole list of options and prices depending on what I would end up doing. I ended up securing my same insurance and went through with starting my Invisalign treatment. The ladies at GLO are amazing to say the least. Dr. Cassidy is very intelligent and attentive. The office is great, clean, and always friendly. I am into my 15 set of trays and because of Dr. Cassidy and her staff I am progressing ahead of schedule and loving this treatment. Couldn’t recommend GLO more to any reader of my review. Family, friend, or complete stranger gets a plug from me about GLO. Best decision I have made in years. Thank you Dr. Cassidy and staff!!

Maciej M. from Seattle, WA (Source: Yelp)


Well, what can I say…I was blown away by the absolutely perfect customer service, Dr. Cassidy’s thoroughness in her examination and assessment and “bedside manner”. You feel taken care of, almost pampered and you don’t want your appointment to end! What a breath of fresh air in the world that has forgotten about excellent customer service. I am looking forward to starting my treatment and I highly recommend Dr. Cassidy’s practice. Check it out, you will not be dissapointed.

Rhea K. from Seattle, WA (Source: Yelp)


Wow! I have never been so inclined to write a review about a Dr’s appt. before, but this place is exceptional! I went in for an eval for “adult braces” and came away knowing feeling that Dr. Cassidy is top top. I also learned that there are many options, including “invisible” braces which are more affordable than I had anticipated. The office is out of this world, and the staff is unlike any compared to other medical offices. Very attentive, considerate and knowledgeable. I feel I am in good hands with Dr. Cassidy!

Hira B. from Seattle, WA (Source: Yelp)


Great first consultation with Dr. Sara. I know my daughter will eventually need braces and was pretty well prepared, having come from multiple “watch and wait” appointments with our orthodontist on the East coast. The front desk and assistant staff were warm and welcoming. Dr. Sara met my daughter where she was, talking to her as if she were the customer (well, lets be honest, she is…) and explaining every detail and answering all questions from both of us. I feel well prepared for the long orthodontic journey we have ahead and I am confident in Dr. Sara and looking forward to building a relationship with her and her team. My daughter is typically quite nervous about things she hasn’t experienced yet and was put at ease by Dr. Sara, who also knew to give us a coupon for a gigantic cookie at a nearby bakery – the final touch to make it an excellent visit for my kiddo. I may even finally look at getting braces for myself, but that is another story.

Meghann K. from Seattle, WA (Source: Yelp)


I highly recommend Green Lake Orthodontics to both adult and youth patients. I went to Dr. Cassidy two years ago and decided to get Invisalign. The office is a cheerful place, every single person working there is friendly and listens to what you’re looking to do treatment wise. After going to Dr. Cassidy I brought my 8-year old in to get an expander. My daughter’s experience has been wonderful — she likes going to the Orthodontist. They offer raffles and give the kids t-shirts — it makes it something to look forward to, not dread. I highly recommend GLO to anyone that’s been on the fence about getting treatment, Dr. Cassidy and team are the ultimate professionals.

Raihan A. from Lynnwood, WA (Source: Yelp)


GLO gets 5 stars in every aspect, from the front of the office to the back. Honestly I could go on and on about how awesome, knowledgeable, friendly, and skilled Dr. Cassidy, Lauren, Yuliya, Kailenne, Hayley, and Cham are, but that would be a novel. Just know this, EVERYONE is great at what they do here, and the end result is that you get a perfect smile and new friends. I never thought I’d say this about getting my braces off, but it truly was bittersweet. Bummed that I won’t be seeing them from time to time, but if I’m in the area, I’ll be sure to stop in to say hi.

Sean H. from Seattle, WA (Source: Yelp)


Amazing Staff! Dr. Sara Cassidy and her staff are simply the best! Professional, knowledgeable, charming, funny, and just downright and simply the best! First time getting braces and my experience couldn’t be better. I am 44 years old and was petrified of getting braces but everyone at Green Lake Orthodontics has made me comfortable throughout the whole process! Thank you all! Can’t wait to see the end results!

Susan Song (Source: Google)


Dr. Cassidy and her team are amazing. The office is immaculate, and she makes going to the orthodontist seemingly quick and pleasant. Lauren is very nice, and she responds to emails very quickly, which I appreciate a lot. Scheduling is kind of a pain in the butt sometimes as their office hours are a little bit limited, but I don’t mind, as the benefits outweigh that one negative.

Tyson Hamilton (Source: Google)


A wire retainer snapped off my tooth, it has been there for a good 20+ years now, the lovely people at Green Lake Orthodontics were able to accomplish me same morning for a consultation and repair. I was greeted with smiles, explanations of all procedures, and a glass of water. Most importantly I walked out with a fixed retainer quickly. Thank you!

Jennifer S. from Wedgwood/View Ridge, Seattle, WA (Source: Yelp)


I had such a great experience at my son Ethan’s initial consultation yesterday. She was able to schedule me conveniently right after our pedo appointment next door at Dr Sata’s and when we learned that we would be done sooner at the dentist they were able to move my appointment time up…not that they would need to because the office has kindle games for the kids to play with so if it were up to Ethan we could stay all day! So, I cannot say enough about Dr Sara Cassidy’s gracious manner and her incredibly natural and genuine care for her patients. She was amazing with Ethan and for a 12 year old to tell you how much they liked someone is saying a lot. Besides having a great location, beautiful office, amazing staff and being incredibly nice she really knows what she is doing and was very thorough. We are going to come back in 6 months and if and when we need braces we will absolutely choose her. My younger son is due for an exam as well and I’m looking forward to going back.

Sarah M. from Seattle, WA (Source: Yelp)


I was SUPER nervous to go see an orthodontist. I mean, I hate HATE going to the dentist and if people look at my mouth I usually growl at them. Maybe I’m not that bad, but I get very anxious about any mouth work. But pictures do not lie, and as I’ve gotten older (early 40s) my teeth were doing this funky shoving and rude crookedness. So I nervously went to see them, and here I am over a year later with a gorgeous straight toothed grin, and happy as could be. Everyone who works there is so nice, and super clean and not scary, and they were very patient with me and all my questions about the different types of braces, what would this do, and that, and would that hurt. And guess what? It didn’t hurt, it was just a little sore every week. I went with the Invisalign with the Accelledent, and switched out my trays every week. Except the holidays, when I went for a stretch of two weeks so that I could enjoy Christmas without braces. I highly recommend GLO!

Adam Wabeke (Source: Facebook)


Nov 2015-Initial evaluation and meet with the team. Aug 2016-Initial braces applied and informed of process in greater detail. Oct 2016-2nd appt. and further adjustments. EVERYTIME I go in, I’m greeted by name and a smile. EVERY staff member has so far been friendly (even at the end of the day when they’ve probably seen a couple dozen patients by this time). I recommend this place VERY highly!

Sean Hill (Source: Facebook)


Dr Cassidy and her team are simply amazing. Their knowledge, expertise, and professionalism has always been world class. I am very happy with my braces and my experiences, thusfar, have always been completely stress free and the entire staff has always been very welcoming.

Mariann K. Nagy (Source: Google)


I absolutely LOVED everybody at GLO. Dr. Sara Cassidy is a fantastic woman with exceptional skills — a strong female lead if I’m allowed to use movie terms. She made me feel super comfortable during my Invisalign process, and every time I arrived to the office I was greeted with smiles. I loved the energy and the openness of the staff, and I’m kinda sad that my treatment is over… But, I have a perfect smile now 🙂

Emily M. from Seattle, WA (Source: Yelp)


Just finished my free consult with Dr. Cassidy and her team. First off, the office is sensational! It’s like firing up a Mac for the first time after being on a Dell your whole life. It’s not just a cosmetic thing, the office is high-tech, but super inviting and “user-friendly.” As a marketing person, I love that they understand and focus on customer experience. The consultation was thorough and not a hard-sell either. As an adult considering braces (yikes!) her team was really understanding of my concerns of being “an adult with braces” and presented treatment options, the Pros and Cons and the prices, and then left it up to me to decide. I’m still not sure which route I’ll take, but I’m confident in Dr. Cassidy and her team. I’ll post updates to the review as appropriate, but for now, this is as good as it gets!

Bob S. from Seattle, WA (Source: Yelp)


I have been going to GLO for the past 6 months and I can’t imagine having a better experience. Dr. Sara is just great, full of energy, very positive. Kerri is such a nice, helpful, warm, positive person, and Kailenne has been great to work with. Dr. Sara promotes healthy living by encouraging clients to wear Fitbit and keep track of their daily movement – I am hooked! I am an adult, wearing braces for the second time (5th/6th) grade and Dr. Sara has helped make the experience a good one. I highly recommend GLO to anyone.

Brandon R. from Seattle, WA (Source: Yelp)


Dr. Cassidy is an amazing Orthodontist. I was one of her patients for many years, through that time I was able to see how good she really is. If you are looking for someone who is great with people, works efficiently, and precisely, in the orthodontia field; look no farther, Because she is the best. She can make something like changing wires, re-fitting brackets, placing bands, etc, seem like fun. Take it from a satisfied patient, I highly recommend Dr. Cassidy.

Lara K. from Seattle, WA (Source: Yelp)


Wow, what can I say about Dr. Sara!! I wish there were more than 5 stars to rate her and her office!! My daughter went to Dr. Sara when she was at orthodontia school at the UW. She was beyond amazing with her. Not only do my daughter’s teeth look fantastic, she loved going to her appointments. Now it’s my son’s turn. He had his first appointment yesterday and, even though he knew Dr. Sara, he was a little hesitant. She made him feel so comfortable right off the bat. She toured him around her amazing office and then explained everything so he could understand. She gave us options for his treatment, but also helped us talk through what would be best for him. He came out of the appointment, looking forward to going back. She does a really fun incentive program that motivates the kids to take good care of their teeth and their health. He can’t wait to start earning points! Dr. Sara is professional as well as warm and friendly. She truly cares about her patients as well as their families. Her staff is incredibly welcoming and friendly as well. You honestly feel like you are going to visit a friend rather that going to an appointment. And did I mention the cupcakes…;)

Gwen G. from Buckley, WA (Source: Yelp)


Dr. Sara Cassidy can be described in 2 words from a patients point of view; The Best! She takes all of her patients needs and wants into careful consideration when she is planning their treatment out which for the record she does in amazing detail and is more than happy to translate it into non-Doctor language for you. I recommend all of my friends to Dr. Cassidy because she is more than a great Orthodontist she is a friend, and her big heart and love for her job is transparent in all of her work!

Heather W. from Seattle, WA (Source: Yelp)


Truly amazing and satisfying experience! Dr. Cassidy is not only highly professional and qualified, but she is also so warm and inviting from the moment she greets you. The GLO office is sparkling clean, beautiful, tech friendly, cheerful, and it runs super efficiently! Dr. Cassidy’s staff went out if their way to make me feel welcome right away and all throughout my appointment. I knew I was in great hands. Most importantly, Dr. Cassidy ensured that I had the most comfortable and efficient experience. She is natural, confident, and truly cares about her patients and staff-it is very evident in the atmosphere. She made it a point to describe what she was doing during the procedure, which is really important when you’re with your medical professional. I’m very pleased with the work she did! If you’re considering orthodontic treatment – for yourself or your children- you will be absolutely excited to work with Dr. Cassidy and her staff! Bonus: parking underneath the building is a major plus in the energetic Green Lake area. Seriously, call GLO now!

Samantha Y. from Seattle, WA (Source: Yelp)


Dr. Cassidy and all of the other employees at GLO are incredible! Everyone is so cheerful and welcoming and have made wearing these teeth spanxs (otherwise known as Invisalign) a wonderful experience. I’m over a year into my treatment and almost done and my teeth look wonderful! Yuliya, the orthodontic assistant I usually always work with, is awesome. Always easy to talk to and my appointments fly by. They made everything so clear when during my first appointment in regards to payments and insurance, expectations and all the awesome perks that come along with being a GLO patient. Although I’m stoked to almost be done with my treatment, I’m sad I won’t be seeing these ladies as often. Truly a great office!!

Sheena K. from Seattle, WA (Source: Yelp)


I didn’t know I could fall in love with an Orthodontic practice, but I did! As an adult looking for braces, I chose Incognito braces and am so glad I did. The treatment was seamless and cosmetically no one knew I had braces, which was a huge selling point for me. As a business owner working with my own clients, I was not only impressed by how well Dr. Cassidy’s office treated me, but inspired to implement their customer service values into my own business. The day after I had my braces put on, I got a phone call from Dr. Cassidy, herself, checking in and seeing how I was doing. She wanted to answer any questions I might have and ease any worries. That really wow’d me. The next 21 months were always pleasant, fun and even during her maternity leave, I never worried about my treatment lapsing. This office is high-tech, clean, modern, inviting, and comfortable. The staff were friends by the end. To the point where it was almost sad to get the braces off. What adult can say that? I’m thankful GLO has been introduced into my life and both of my young children will be coming here when the inevitably need their own orthodontic work. No question.

Melike Eden Malkoc (Source: Facebook)


The Staff at Green Lake Ortho– are AWESOME- my countdown–17 months!! With their incentives- I can earn teeth whitening and gift cards!. I walked out with a turquoise hoodie today! Who do you know that needs bite correcting/ braces? – send them to GLO! tell them Eden sent you.

Anonymous (Source: Zocdoc)


The support staff was extremely warm, friendly, and helpful. My daughter was seen in a timely manner. She was made comfortable during the dental photography. Dr. Cassidy was extremely knowledgeable and patient in answering all of my questions about different treatment options. She has an excellent patient rapport and seems to have a holistic perspective with designing the treatment plan. I appreciate her philosophy of waiting to see growth/development of my daughter’s teeth and explaining the optimal timing of different procedures in accordance with child growth. My only complaint is the 20-minute wait between being seen by the support staff and Dr. Cassidy’s consultation and exam. But the overall experience with the staff and Dr. Cassidy outweighed this inconvenience. I would recommend Dr. Cassidy to others.

Lisa B. from Seattle, WA (Source: Yelp)


Awesome, just simply AWESOME, customer and dental service. If you are in any need of orthodontic care, look no further than Dr. Cassidy. Information is presented in a down-to-earth manner without dental jargon (if you have kids, you know how important this must be). The office itself is clean and high tech. The staff, including Dr. Cassidy, must take happy pills or something. Everyone I encountered in that office was incredibly upbeat and kind. I have NEVER been to a medical or dental office in which I am served cold sparkling water! HELLO! That right there was worth the cost of admission! However, the best part is an exam/consulting room that is set up not only for, well, the exam, but has room for parents to sit in and watch the procedures. The aim is clear: make the experience as comfortable and enjoyable as possible. And GLO makes it all look easy. Truly, its insane how on top of things this place is.


Green Lake Orthodontics offers orthodontic treatment for patients of all ages. Our mission is simple: deliver an experience so fantastic that all you want to do is talk about it. Seattle Orthodontist Dr. Cassidy is trained in a wide range orthodontic treatment types - from metal braces to clear braces to Invisalign. We'll evalute whether early-phase orthodontics, two-phase orthodontics, surgical orthodontics, Wilckodontics, TAD treatment, dentofacial orthopedics or lingual braces will be the best way to get you the results you want. Dr. Sara Cassidy graduated from the University of Washington School of Orthodontics with a clear vision about the experience she wanted to create for her patients. In March 2013, she opened the doors to her beautiful new Seattle Orthodontic practice and began seeing patients. Dr. Sara Cassidy was raised in Spokane, Washington. As the daughter of a third generation dentist who was also the first female dentist in Spokane, Sara realized early on that she wanted to pursue a career in medicine. She studied classical piano, danced ballet & skied for the Mt. Spokane ski team. Her schooling then took her to Santa Clara University where she earned a B.S. in Combined Sciences & spent her a year abroad studying in Italy. Despite growing up among dentists, it wasn't until college that Sara decided her passion for medicine & art was a perfect fit for Orthodontics. She received her D.D.S from the University of Washington & subsequently completed a one year General Practice Residency through Swedish Hospital in Seattle. Dr. Cassidy returned to the University of Washington to complete a two and a half year residency specializing in Orthodontics & earning a Masters in Dentistry. In her free time she loves to spend time with her husband & chocolate lab, travel, run, ski, play the piano, dance, draw, & scuba dive.