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Invisalign ProviderAccepting new patients

Mergen Orthodontics

Mergen Orthodontics is a two-location practice in Iowa City and Coralville, IA, led by Dr.

1570 Mall Dr # 1, Iowa City, IA 52240
4.9(462 reviews)
Call Now(319) 688-0800Book OnlineWebsiteDirections
Mergen Orthodontics

About Mergen Orthodontics

Dr. John Mergen's Invisalign-heavy practice draws praise for resolving TMJ pain, narrow palates, and overbites other orthodontists had missed.

Mergen Orthodontics treats a high volume of Invisalign and clear aligner cases, and reviews often note results beyond what patients expected, from corrected overbites to widened palates that reduced mouth breathing in young children. Dr. John Mergen is frequently credited with explaining each step of treatment and diagnosing issues, including TMJ and jaw pain, that other providers had overlooked. Scheduling comes up often too, with two locations, on-time appointments, and flexibility for college students and working families.

Summary of 200 patient reviews, September 2019–November 2025, updated September 2026

Mergen Orthodontics is a two-location practice in Iowa City and Coralville, IA, led by Dr.

John Mergen, a Top 1% VIP Diamond Plus Invisalign provider. The practice offers comprehensive orthodontic care including Invisalign, preventive orthodontics, sleep apnea treatment, and braces for patients of all ages.

Treatments offered

Early TreatmentEarly TreatmentInvisalignInvisalignSurgical OrthodonticsSurgical OrthodonticsTMJ TreatmentTMJ TreatmentClear AlignersClear AlignersTraditional BracesTraditional BracesClear BracesClear Braces
GuidesHow much does Invisalign cost? →Clear aligner costs explained →Adult braces cost guide →

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

Dr. John Mergen, DDS, MS

NPI verified · no bio or photo on file

Lead OrthodontistNPI VERIFIEDAccepting New Patients

Insurance accepted

The site mentions accepting insurance and filing claims, but no specific insurance carriers or plans are named.

What patients say

Latest review 11 months ago

What patients praise

  • Reviews describe Invisalign correcting overbites, crowding, and even TMJ or jaw pain that prior orthodontists had missed.
  • Early treatment for children as young as 7-9 is noted for widening narrow palates and avoiding extractions or expanders later on.
  • Appointments across two locations are described as easy to schedule around college breaks, sibling visits, and work hours.

Who it suits

  • Adults considering Invisalign for TMJ or bite issues
  • Young children needing early palate or crowding treatment
  • Families coordinating multiple kids' appointments

Doctors patients mention

  • Dr. John Mergen · 149 reviews
Last 12 months
2 reviews
averaging 5.0★
Owner replies
50% of reviews
Reviews per month
7
Oct 2023Sep 2026
Reviews per month
Oct 20234
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Dec 20237
Jan 20240
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Sep 20240
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Nov 20240
Dec 20240
Jan 20250
Feb 20250
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Oct 20250
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Star ratings
  • 5★449
  • 4★7
  • 3★0
  • 2★0
  • 1★5
Average rating by year
  • 20125.0
  • 20135.0
  • 20145.0
  • 20155.0
  • 20165.0
  • 20174.9
  • 20185.0
  • 20195.0
  • 20205.0
  • 20214.8
  • 20224.9
  • 20235.0
  • 20244.2
  • 20255.0
1★5★
Treatments patients mention
  • Invisalign / clear aligners113
  • Braces16
  • Early (phase 1) treatment8
  • Retainers3
  • Jaw surgery3
What patients talk about
PraiseCriticism
  • Treatment results61
  • Friendly staff38 / 1
  • The orthodontist38
  • Scheduling & wait times33
  • Great with kids28
  • Clear explanations22
  • Treatment timeline15
  • Gentle, comfortable care14
What patients talk about
ThemePraiseCriticism
Treatment results610
Friendly staff381
The orthodontist380
Scheduling & wait times330
Great with kids280
Clear explanations220
Treatment timeline150
Gentle, comfortable care140

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Recent reviews from Google

4.9
462 reviews
Ben
Ben
10 months ago
“

Just had my final visit today after 18 months! Mergen and staff have always been friendly and professional, and I haven't had a bad experience in my time with them. The facility in Iowa City is always so clean. You can trust that they are thorough in their work and that they actually care about the service they provide.

Review from Google

missy molleston
missy molleston
a year ago
“

My twin daughters established care with Dr. Mergen at age 9. Their permanent teeth were coming in and were very crowded. I honestly wasn't sure what kind of results he would be able to get because their mouths were so small, but I trusted his process and the outcome was amazing! Our dentist had been concerned that one of the girls was missing a permanent tooth, but Dr. Mergen made space for all the teeth to come it properly. I can't recommend Mergen Orthodontics highly enough.

Review from Google

Misti
Misti
2 years ago
“

Out of all of the business I've visited throughout my life, Mergen Orthodontics has been the best experience yet. Dr. Mergen is wonderful! He's kind, understanding, great with children, and a fantastic orthodontist. The staff is also phenomenal. They are all very welcoming, knowledgeable, and accommodating. Oh, and they're incredibly efficient. We've never waited more than a minute or two. Having Invisalign as a young child is a big responsibility. Our daughter did pretty well. However, whenever an issue did arise, everyone was immediately there to help. They all made this a wonderful experience, and I would highly recommend them to everyone!!

Review from Google

Teri Kline
Teri Kline
2 years ago
“

Dr Mergen and his staff are professional, friendly, and make the whole experience wonderful. If you feel you have horrible teeth and embarrassed, there is no shaming here. I even lost a tooth due to chemo and they were very professional and even provide next step and contacted my dentist for me. The visits are fast and they are very accommodating to fit your schedule. I would recommend and know you are in good hands with a very experienced staff. P.S. Not to mention my teeth are beautiful again. It's never too late, I'm in my 60's!

Review from Google

Tanesha Herman
Tanesha Herman
2 years ago
“

I had a great experience with Dr Mergen and his staff. They are so kind, always welcoming, and seemed ginuinely interested in knowing about me and my interests. It made the process go smoothly. They were very thorough in explaining the process and answering any questions I had. I have been getting so many compliments about my new smile.

Review from Google

Read all 462 reviews on Google →

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) 688-0800 or book online to schedule.
Is Mergen Orthodontics accepting new patients?+
Mergen Orthodontics is currently welcoming new patients in Iowa City, IA. Call (319) 688-0800 or book online to schedule.
Where is Mergen Orthodontics located?+
Mergen Orthodontics is located at 1570 Mall Dr # 1. Get directions: https://maps.google.com/?cid=17986444164267794453&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 4.9-star rating based on 462 patient reviews on Google.

Other Mergen Orthodontics locations

Mergen Orthodontics
3268 Crosspark Rd Suite 101, Coralville · 5.0 (122)
View →

Research with AI

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1570 Mall Dr # 1
Iowa City, IA 52240
Get Directions
(319) 688-0800
mergenorthodontics.com/
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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 / NFCCareCredit
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

Mergen Orthodontics on TikTok
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