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Meet Dr. Mergen

Dr. Mergen is devoted to creating amazing, “Mergen Orthodontic Smiles”. His signature smiles are said to change the life of his patients. He is known for his dedication to providing patients with exceptional service and advanced clear options that always exceed their expectations. Dr. Mergen creates a fun, relaxed environment where patients love to visit. The treatment options that Dr. Mergen offers are less obtrusive (clear) and he operates in an efficient manner in order to make orthodontic treatment short and sweet.

Being a second-generation orthodontist, Dr. Mergen followed in his father’s footsteps in providing excellent care to every patient. He helps to change his patients’ lives by improving their smiles which also improves their self-esteem! He helps mentor high school teens who have an interest in the field of orthodontics by allowing job shadowing in his practice. Dr. Mergen finds great joy in showing his patients their original photos to see their reaction on the day the braces come off. It is an amazing transformation…so much more than just a smile!

Why Mergen?

When you visit our Iowa city orthodontic offices, you will find that the Mergen Orthodontics Difference makes you feel comfortable, confident about your orthodontic treatment, and certain that we care. Because we do! Our office’s success depends upon providing each and every patient with the best possible care and helping them to achieve the most successful possible outcome.

Extensive Orthodontic Experience

Dr. John Mergen has been providing happy smiles to patients in Johnson County and the surrounding areas since 1997. He believes in creating a fun and relaxed atmosphere where patients always feel welcome and comfortable. So when you walk through our doors, you’ll feel like you’re in a warm, inviting coffee shop with fresh-baked cookies, hot cocoa, donuts, and monthly fun giveaways. We specifically designed our offices to not look like an office, but a place that’s comfortable and even spa-like.

Satisfaction Guarantee

We’re so confident you’ll love your experience at Mergen Orthodontics, we back it up with a 100% Satisfaction Guarantee. You read that right! If you are less than satisfied with the care you receive from our experienced team, simply let us know and we’ll do what it takes to make it right. It’s our promise to you!

Advanced Technologies

Orthodontics has become a cutting-edge discipline, and all these innovations mean that we can offer patients like you the very best the industry has to offer. Here are just a few of the state-of-the-art diagnosis and treatment options we offer at Mergen Orthodontics: 3D digital Scanner ( iTero), Digital X-Rays, Invisalign and Accelerated Orthodontic Treatment.

Payment Plans For Braces & Orthodontics

We believe your health comes first, which is why we keep our costs fair and provide flexible payment options for your convenience. We proudly accept Delta Dental, Metlife, and Cigna insurance plans. We also offer in-house financing options, plus 0% payment plans for orthodontic treatment through CareCredit and Lending Club. When you walk through the doors to meet our Mergen Orthodontist team, you can feel confident that your dental health is our main priority. 

Types of Treatment

Our orthodontist, Dr. Mergen, and his orthodontic team at Mergen Orthodontics offer our patients a variety of the most advanced orthodontic treatment in Iowa City, IA. Our goal at our orthodontic office is to help you feel confident in your happy, healthy smile. Choose from any of the options below to learn more about our many state-of-the-art treatment options.

Clear Braces

Do you spend a lot of time posing in front of the camera or speaking to crowds? Are you looking for a more discreet way to straighten your teeth? If so, we have good news. You can do this now with clear braces in Iowa City, IA, the invisible option that is hardly noticeable even up close. Even better news? Dr. Mergen has been a leader in totally clear orthodontic options for more than two decades. He can help you achieve the smile you want – without the high visibility you don’t want.

Accelerated Orthodontics

If you are looking for noninvasive accelerated Invisalign® or braces treatment, you’ve come to the right place. Dr. Mergen has the treatment expertise and experience for accelerated orthodontics in Iowa City, IA. In fact, he is one of the top providers of AcceleDent treatment in the state (Diamond Provider status), and the leader of AcceleDent in Eastern Iowa. He can help you reach your goal of flashing a winning smile before you know it!


Not every orthodontist has the expertise to offer Invisalign in Iowa City, IA. In fact, our orthodontist, Dr. Mergen, is the Top Invisalign Provider in eastern Iowa and only 1 of 3 orthodontists in the state with VIP Platinum Provider status. If you’ve been told that you’re not a good candidate for Invisalign, it’s in your best interest to seek a second opinion with Dr. Mergen. Why? With his advanced training and extensive experience, everyone – even you – can benefit from this state-of-the-art treatment. 

Invisalign Teen

What if you could experience high school without the self-consciousness or awkwardness that comes with braces? With Invisalign Teen’s discreet treatment, you can enjoy taking pictures at your homecoming dances, sporting events, and even prom with a bright, confident smile! Invisalign Teen is similar to traditional Invisalign. With a series of clear, removable plastic aligner trays, you can straighten your teeth with friends or family barely noticing. If you’re ready to boost your confidence with your best smile, Dr. Mergen is a top provider and 5-star-rated orthodontist for Invisalign Teen in Iowa City, IA.

Airway Orthodontics

A common misperception of orthodontic treatment is that it treats a problem that is primarily aesthetic. Naturally, the confidence that comes from straight teeth and a beautiful smile can benefit you throughout your life. However, orthodontics is about more than looks. When a child’s facial structure is guided properly, there can be lasting positive effects on the way they breathe. As a top-rated orthodontist specializing in Airway Orthodontics in Iowa City, IA, Dr. Mergen strives to provide orthodontic treatment that does more than straighten teeth – he seeks to provide you or your child with a lifetime of healthy breathing.


Temporomandibular joint disorder, also called TMD or TMJ, develops when uneven stress or strain puts excessive pressure on the joints of your jaw, causing your muscles and joints to become irritated and inflamed. If you suspect you’re suffering from TMD/TMJ in Iowa City, IA, our expert orthodontist and his team can help.

Surgical Orthodontics

Many people don’t realize that problems such as bad bites, jaw bone abnormalities, or misaligned jaws can be corrected with orthognathic surgery. Orthognathic simply means “straight jaws” and when coupled with orthodontics afterward, will result in the realignment of your teeth. Typically, surgical orthodontics is recommended as a last-resort treatment option, but there may be certain situations where opting for surgery can produce your best result. If you need surgical orthodontics in Iowa City, IA, our experienced orthodontist, Dr. Mergen, will work closely with an oral surgeon to prepare your teeth for the surgery.

Pediatric Orthodontist

If you’re searching for a pediatric orthodontist in Iowa City, IA, then you’ve come to the right place! Our award-winning office and top-rated doctor provide expert care for children – delivered with a kid-friendly touch. We evaluate malalignments of the teeth that are common in children, offer adjustments to correct any bite issues, and follow through with Invisalign or clear braces options when your child is ready. We also understand that appointments can be stressful for children, so we always use kid-friendly language and ensure children are as comfortable and relaxed as possible.

Raving Reviews!

“Great customer service! Very friendly staff. Didn’t have to wait in the lobby for more than a couple minutes, very fast and efficient =) The only thing that I would consider doing differently is to schedule an appointment halfway through to discuss the progress on the braces and what the pt would still like changed from a cosmetic standpoint, and what will be done the following weeks until the braces are off. Overall very great care received, would recommend Mergen Orthodontics to others.” – Melanie V.

“I got Invisalign from Dr.Mergern and wore them for a little less than 1 year. After getting them off I noticed two teeth were not in the position I was hoping for. Dr.Mergen and the staff rescanned my teeth and were able to get the two teeth corrected without any problems. The 2nd correction was done with no additional charge and I am very happy with teeth!” -Grant L. grant v

“Everyone in the office was very personable, friendly and enthusiastic to make sure the patient’s needs were met. I was referred to Mergen by my dentist and I am happy to be in their care. Every step of my visit was well prepared and thoroughly broken down by Dr. Mergen and the assistants. I look forward to giving them my business.”- Erin W. erin patient review