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Invisalign ProviderAccepting new patients
Mergen Orthodontics
Mergen Orthodontics is a Top 1% VIP Diamond Plus Invisalign provider serving patients of all ages in Iowa City and Coralville, Iowa.
3268 Crosspark Rd Suite 101, Coralville, IA 52241
5.0(122 reviews)
About Mergen Orthodontics
Dr. John Mergen's practice draws praise for solving complex bite and airway cases with Invisalign instead of jaw surgery or extractions.
Reviews at Mergen Orthodontics point often to Invisalign and clear aligner treatment, including cases involving sleep apnea, missing teeth, or open bites that other consultations said would need jaw surgery. Adults make up a notable share of patients, many describing complex or long-standing issues resolved through expansion or aligner-based approaches rather than extractions. Several families mention driving well over an hour to stay with the practice, and timelines are often described as quicker than expected, with some Invisalign cases wrapping up in 14 to 16 months.
Summary of 112 patient reviews, January 2023–November 2025, updated September 2026
Mergen Orthodontics is a Top 1% VIP Diamond Plus Invisalign provider serving patients of all ages in Iowa City and Coralville, Iowa.
The practice offers comprehensive orthodontic care including Invisalign, braces, preventive treatment, sleep apnea solutions, and TMJD treatment, with a focus on advanced technology and personalized care.
Treatments offered
Early TreatmentInvisalignSurgical OrthodonticsTMJ TreatmentClear AlignersTraditional BracesClear Braces
Who They Treat
Mergen Orthodontics provides orthodontic treatment for the following age groups:
Children
Ages 6–11
Teens
Ages 12–17
Adults
Ages 18+
Technology & Equipment
Mergen Orthodontics uses modern orthodontic technology to deliver precise, comfortable treatment.
3D Digital Scanning
Orthodontists at this office
provider
headshot
headshot
Dr. John Mergen, DDS, MS
NPI verified · no bio or photo on file
Lead OrthodontistNPI VERIFIEDAccepting New Patients
What patients say
Latest review 12 months ago
What patients praise
- Reviewers describe Dr. Mergen resolving complex cases, such as open bites and sleep apnea, using Invisalign instead of jaw surgery.
- Adults frequently mention successful aligner treatment for long-standing or previously unresolved bite issues.
- Several families continue treatment here even after relocating, with some driving over an hour for appointments.
Who it suits
- Adults with complex or long-standing bite issues
- Families managing several kids in treatment
- Patients transferring mid-treatment from elsewhere
Doctors patients mention
- Dr. John Mergen · 52 reviews
- Last 12 months
- 2 reviews
- averaging 5.0★
- Owner replies
- 94% of reviews
73
Oct 2023Sep 2026
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- 5★120
- 4★1
- 3★0
- 2★0
- 1★0
- 20235.0
- 20245.0
- 20255.0
1★5★
- Invisalign / clear aligners42
- Braces10
- Retainers5
- Early (phase 1) treatment5
PraiseCriticism
- Treatment results25
- Friendly staff22
- Scheduling & wait times21
- The orthodontist20
- Clear explanations13 / 1
- Great with kids15
- Office & technology11
- Treatment timeline11
| Theme | Praise | Criticism |
|---|---|---|
| Treatment results | 25 | 0 |
| Friendly staff | 22 | 0 |
| Scheduling & wait times | 21 | 0 |
| The orthodontist | 20 | 0 |
| Clear explanations | 13 | 1 |
| Great with kids | 15 | 0 |
| Office & technology | 11 | 0 |
| Treatment timeline | 11 | 0 |
Recent reviews from Google
5.0
122 reviews
Cristy Birely
10 months ago
I normally do not do Google reviews but I've been so happy with everything at Dr. Mergens office I wanted to share. I went in for my evaluation and learned my teeth and bite were worst then I knew. However I didn't want to spend the money on treatment. As a 50 year old patient I just thought I would let it go. But after a while of thinking, I decided to pull the trigger and trust the process. I'm currently 7 months into my 18 month treatment plan and I'm thrilled with the changes so far. Everyone at the office is so nice. It's easily been one of the best decisions I've ever made and I can't wait to see the end result! Highly recommend.
Jorie Schmit
11 months ago
Highly recommend Mergen Orthodontics and Invisalign! As a person who underwent orthodontic care for the first time as an adult, I loved Invisalign and had a wonderful experience! Dr. Mergen and his team are so friendly, wonderful, and always willing to work with you!
Megan Triplett
a year ago
We are beyond impressed with Mergen Orthodontics! They were extremely friendly. You can truly tell that they care about each one of their patients. From the moment you walk in, you feel welcome and at ease. They develop individual plans to best fit each one of their patients. My daughter has never been excited to go into a clinic before coming to Mergen. Now, she asks when she can go back a few times a week! Thank you for providing such a wonderful experience for everyone.
Trevor VanderWilt
2 years ago
We have really been impressed with the care at Mergen Orthodontics. They are so friendly, really great at what they do, and professional. They helped my daughter straighten out her teeth with invisalign when all other area orthos we saw said she would require a longer treatment with regular braces as her only option. We have younger kids needing ortho treatment and will continue here even though it is over an hour drive each way.
Dan Pho
Edited 2 years ago
That staff are amazing at Mergen. They’re willing to work out payment plans and ensure that you receive the best care. My daughter was put on Invisalign and the results are incredible. I would definitely recommend very professional and friendly.
Questions about this practice
What orthodontic treatments does Mergen Orthodontics offer?
Mergen Orthodontics offers: Early Treatment, Invisalign, Surgical Orthodontics, TMJ Treatment, Clear Aligners, Traditional Braces, Clear Braces.
Does Mergen Orthodontics offer free consultations?
Yes, Mergen Orthodontics offers a free initial orthodontic consultation. Call (319) 626-2142 or book online to schedule.
Is Mergen Orthodontics accepting new patients?
Mergen Orthodontics is currently welcoming new patients in Coralville, IA. Call (319) 626-2142 or book online to schedule.
Where is Mergen Orthodontics located?
Mergen Orthodontics is located at 3268 Crosspark Rd Suite 101. Get directions: https://maps.google.com/?cid=15762079822741804275&g_mp=CiVnb29nbGUubWFwcy5wbGFjZXMudjEuUGxhY2VzLkdldFBsYWNlEAIYBCAA
What are the office hours for Mergen Orthodontics?
Mergen Orthodontics office hours: Mon 7:00 AM–4:00 PM, Tue 8:00 AM–5:00 PM, Wed 7:00 AM–4:00 PM, Thu 8:00 AM–5:00 PM, Fri 7:00 AM–4:00 PM, Sat Closed–Closed, Sun Closed–Closed.
Does Mergen Orthodontics offer payment plans?
Yes, Mergen Orthodontics offers flexible payment plans to make orthodontic treatment affordable.
Who are the orthodontists at Mergen Orthodontics?
Mergen Orthodontics is staffed by Dr. John Mergen.
What is the patient rating for Mergen Orthodontics?
Mergen Orthodontics has a 5-star rating based on 122 patient reviews on Google.
Other Mergen Orthodontics locations
Research with AI
Accepting new patients
Free Consultation
Payment Plans Available
In-House Financing
Online Booking Available
Accessibility & Parking
Wheelchair Accessible Entrance
Wheelchair Accessible Parking
Wheelchair Accessible Restroom
CashCredit CardsDebit CardsContactless / NFC
Mon7:00 AM – 4:00 PM
Tue8:00 AM – 5:00 PM
Wed7:00 AM – 4:00 PM
Thu8:00 AM – 5:00 PM
Fri7:00 AM – 4:00 PM
SatClosed
SunClosed
Social Profiles
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