I decided to update my review because Dr. Kim and his team truly made things right. The phone issue that caused my original review was due to an unexpected outage with their phone provider. Dr. Kim personally apologized to me several times and explained exactly what happened. More importantly, they immediately switched to a new phone system to prevent it from happening again. Since then, every time I had concerns about my braces or experienced discomfort, Dr. Kim has been incredibly patient, kind, and responsive. On two separate occasions, he even stayed after office hours to see me for urgent adjustments. He absolutely didn't have to do that, but he genuinely cared about making sure I was okay. That level of care and responsibility means a lot to me. I truly appreciate Dr. Kim for taking my concerns seriously and always making me feel heard and cared for. I highly recommend Dr. Kim to anyone looking for an orthodontist who is professional, responsible, patient, and truly cares about his patients. read more

Dr. Kim changed my life. Before treatment, my crowded canine tooth made the area around my mouth look uneven and protrude whenever I smiled. I was always self-conscious in photos and rarely smiled with confidence. Now my teeth are perfectly aligned, my smile looks natural, and even my jawline appears slimmer! The biggest surprise wasn't just having straight teeth, it was how much more attractive and confident I feel. People constantly ask me if I've lost weight or had plastic surgery. The truth is simple, a beautiful/confident smile changes everything. Choosing Dr. Kim was the best investment I've ever made in myself. I only wish I had done it sooner. Thank you, Dr. Kim read more

One Smile Orthodontics - Orthodontists Near Me - West Covina, California

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I cannot recommend this establishment enough! Claudia, the receptionist, is the sweetest and so very kind. She's always been helpful assisting me with questions, appointments, or concerns. Through her interactions and demeanor, I can see that exhibits genuine care towards myself and other patients. I can also confidently say that Dr. Kim is one of the best in the profession. His skill and knowledge gives a sense of reassurance that you know you're in the right hands. Again, he demonstrates that he genuinely cares about his patients and shows that he knows exactly what he's doing. I have just a couple of months left before I remove my braces, but I can already tell that they're going to be so straight! I have a lot of gratitude and appreciation for the OneSmile team! read more

Made my teeth look so good and amazing!! Staff was super nice too and everyone has good experience.

I had such a great experience at One Smile Orthodontics with Dr. Kim. From the very first visit, everything felt calm, organized, and genuinely welcoming. The whole process was explained clearly, and I never felt confused or rushed at any point. The office is beautiful--clean, modern, and comfortable. Claudia at the front desk deserves a special mention. She was incredibly kind, patient, and always made sure I felt taken care of, which honestly makes a big difference when coming in for appointments. Dr. Kim is someone you can trust. He's very knowledgeable but also takes the time to really listen and explain things in a way that makes sense. I always felt confident that he truly cared about the details and about my overall experience, not just the result. Choosing One Smile Orthodontics was one of the best decisions I've made. If you're looking for an orthodontist in West Covina who genuinely cares and makes the entire journey feel comfortable, I can't recommend them enough. Thank you, Dr. Kim and Claudia, for helping me feel confident about my smile. read more

The office receptionist, Claudia, was very accommodating during my visit. She was generous and caring enough to help me with my orthodontic issue. read more

I got another treatment from him based on my previous work at another dental office because they did a mediocre job at it. Now i am much happier with the new result! Exceptional knowledge! read more

Great experience! The office is clean and nice. Dr. Kim took time to explain my treatment and answered all of my questions. Highly recommend to anyone looking for professional treatment! read more

Great experience at One Smile Orthodontics! Super friendly staff, clean modern office, and everything was explained clearly. Appointments were easy and on time, and the results speak for themselves. Highly recommend! read more

If you are an adult patient who is considering a ortho treatment that you've been thinking about for your entire life, I highly recommend Dr. Kim. I was initially nervous about the process but Dr.Kim was very attentive and took time to come up with the plan that will address my concerns so I decided to start the treatment. My two main concerns were crowded lower anterior teeth and narrow upper jaw. Before starting the treatment, Dr. Kim clearly explained the treatment plan and timeline, which helped alleviate my concerns. Since I didn't want to wear the palate expander, Dr. Kim came up with alternative solution that can be done with Invisalign. Even as a first time ortho patient, I felt treatment plan was well thought out and precisely moving my teeth without causing excessive pain. I'm currently done with my initial treatment and waiting for refinements sets but I'm already very happy with the results so far. read more

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There's a few things I look for when choosing an orthodontic office.. cleanliness, customer service and expertise. This office checks all my boxes and more. The doctor and his staff makes you feel like a friend giving you good advice and thoroughly going over the process at every visit. I highly recommend anyone wanting a more beautiful smile to come to this office. You will feel comfortable and well taken care of. Claudia at the front desk helped me push forward with my insurance carrier to help with my daughter's braces and fees. Happy to say she followed through and my girl is almost there with that million dollar smile without the heavy fees for me. Thanks you One Smile read more

We go for Marcos Braces and all Dental Car. The quality of care we get from Dr. Kim is above outstanding. Our overall experience with One Smile has been nothing but the best of experiences. My Son Marco's Teeth are looking so good, he's in the process of Straightening his teeth with Braces and this process has been a great one Marcos teeth look better by the day . Thank you so much One Smile Dentistry and also want to thank Claudia for exceptional Customer service she has been nothing but helpful thoughout this whole process..Thank you Girl.. Your the best . Mitzi & Marco Cabezas... read more

Excellent service and very nice staff the dr are very nice and professional, the office looks great and clean, the receptionist Claudia is very nice and friendly. read more

He has excellent customer service and is very friendly I've been here a while and the service is always very good. It's in a good area and always very clean. read more

I've visited many dental and ortho clinics over the years, so I usually know what to expect. But my experience with Dr. Namgu Kim stood out immediately not because of a single moment, but because of the overall feeling of consistency and professionalism that's hard to find. What impressed me first wasn't just his explanation, but the clarity behind it. He doesn't overwhelm you with technical terms, and he doesn't oversell anything either. He simply lays out what's happening, why it matters, and what the realistic options are. It feels less like a "consultation" and more like a collaborative conversation about your own health. Another thing that genuinely surprised me was the atmosphere during treatment. There's a calmness to the way he works focused, precise, but never rushed. You can tell he's fully present with the patient in front of him, which is rare in clinics that move people in and out on a schedule. I also appreciated how he balances honesty with reassurance. If something will take time, he says so. If there are limits to what a treatment can do, he doesn't pretend otherwise. That level of transparency actually made me trust the process more, not less. Even small interactions mattered. He pays attention, remembers details, and notices little things about your bite or habits that most dentists overlook. There's a quiet confidence in the way he handles those details that made me feel like I was in very capable hands. I didn't walk out feeling "sold to." I walked out feeling understood and that's the reason I decided to start my treatment here. If you're looking for someone who combines technical skill with genuine integrity, Dr. Namgu Kim is the person I'd recommend. Not because he tries to impress you, but because he doesn't have to. read more

I've been going to Dr. Kim for invisalign. His office isn't very close to where I live but there were a lot of great reviews and I wanted someone who actually cares about their patients. I'm so glad I found him!! Super happy with the progress. He is attentive, caring, and has a good sense of humor. I'd definitely recommend Dr. Kim! read more

One Smile Orthodontics is an amazing place, and I'm genuinely glad I chose to start treatment here. From the first consultation, the entire team was warm, welcoming, and very professional, which immediately put me at ease. Dr. Kim took the time to clearly explain my treatment options, answer all my questions, and create a personalized plan that fit both my goals and my lifestyle. read more

Dr Kim is the most genuine and caring Orthodontist. His staff is also very caring. If you want an amazing beautiful smile, this is the place to go!! read more

Dr. Kim is an exceptional orthodontist. His passion for aesthetics truly stands out, and it's clear that he takes great pride in both the science and the art of orthodontics. He is extremely knowledgeable, detail-oriented, and takes the time to explain the reasoning behind each recommendation, which builds a lot of trust. You can tell he genuinely cares about achieving the best possible outcome, not just functionally but aesthetically as well. I felt confident throughout the process knowing I was in such capable hands. Highly recommend Dr. Kim to anyone looking for an orthodontist who truly understands and values aesthetics. read more

Overall, a great and comfortable experience. The staff is incredibly friendly and helpful, so I would highly recommend One Smile Orthodontics to anyone. read more

Thanks to Dr. Kim, my teeth are perfectly aligned, and my daily life has improved so much because of it. I'm truly happy thanks to you, Doctor! read more

Dr. Kim and his staff are highly knowledgeable and professional. The level of care and attention to detail is outstanding. I would absolutely recommend this office to anyone seeking orthodontic treatment read more

Hands down the best orthodontic experience I've had. Super professional, very gentle, and explains everything clearly. The office runs smoothly and the staff is always welcoming. Couldn't be happier with the results! read more

I don't normally leave reviews, but after visiting Dr. Namgu Kim I feel compelled to share it. I went for a consultation about possibly getting braces or Invisalign, and as someone who always had a lot of anxiety around dental visits, I was honestly nervous walking in. But the moment I met Dr. Kim, I felt at ease. He has a reassuring presence and a genuine way of listening that makes you feel cared for as a patient -- not rushed, not pressured, just understood. Dr. Kim took the time to thoroughly examine my teeth, explain what he was seeing, and walk me through my options in a way that was clear and easy to understand. He pointed out details that other dentists had overlooked and laid out a step-by-step plan that made me feel confident about what comes next. He focused on what would genuinely serve my needs and comfort level. As someone with dental anxiety, that meant a lot. For the first time, I felt like I was in the hands of a specialist who really prioritized my well-being. If you're considering orthodontic treatment -- Invisalign, braces, or even just a professional opinion -- I cannot recommend Dr. Namgu Kim highly enough. His expertise is exceptional, his communication is clear, and his compassion is unmatched. I walked out feeling informed, supported, and surprisingly excited about the next steps. Thank you! One Smile Orthodontics truly lives up to its name. read more