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MPS Chicago (Millennium Park Smiles) is a general and cosmetic dental practice offering a range of services including cleanings, restorative dentistry, implants, and Invisalign clear aligners.
About Millennium Park Smiles
Downtown Loop location draws patients from across Chicago and beyond, with Dr. John Kontos praised for honest, no-pressure recommendations and a gentle touch with anxious patients.
Located in a historic Loop building close to the L train, Millennium Park Smiles draws downtown workers as well as some patients who travel from out of state. Reviews often highlight Dr. John Kontos for explaining treatment options honestly and avoiding unnecessary procedures, with several noting root canals and cleanings completed with little to no discomfort. A renovated, modern office with skyline views also comes up often.
Summary of 195 patient reviews, June 2017–September 2026, updated September 2026
MPS Chicago (Millennium Park Smiles) is a general and cosmetic dental practice offering a range of services including cleanings, restorative dentistry, implants, and Invisalign clear aligners.
The practice features four dentists with over 100 years of combined experience across three generations.
Treatments offered
Who They Treat
Millennium Park Smiles provides orthodontic treatment for the following age groups:
Technology & Equipment
Millennium Park Smiles uses modern orthodontic technology to deliver precise, comfortable treatment.
Orthodontists at this office
Dr. Sara Khan, MD
NPI verified · no bio or photo on file
Dr. Chris Baboulas, DDS
NPI verified · no bio or photo on file
Dr. Ronald Metelka, DDS, MS
NPI verified · no bio or photo on file
Dr. Reid Sigman, DDS
NPI verified · no bio or photo on file
Dr. John Kontos, DDS
NPI verified · no bio or photo on file
Insurance accepted
10 plans listedWhat patients say
Latest review 7 weeks ago
What patients praise
Things to know
Who it suits
Doctors patients mention
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| Sep 2026 | 4 |
| Theme | Praise | Criticism |
|---|---|---|
| The orthodontist | 87 | 3 |
| Friendly staff | 58 | 7 |
| Gentle, comfortable care | 32 | 0 |
| Clear explanations | 22 | 0 |
| Scheduling & wait times | 14 | 6 |
| Office & technology | 18 | 0 |
| Cost, insurance & financing | 10 | 6 |
| Location & hours | 11 | 0 |
Recent reviews from Google
This has been my dental location for over 30 years and quality of service is great, and staff is very friendly. Dr. Kontos is an amazing dentist and has done great work on my dental procedures. The hygienist’s that work there are very thorough and friendly. I believe they are the only place I have kept for over 30 years other than husband and car, love my 4w drive in Chicago.
Since moving to Chicago, I needed to find a new dentist. It wasn’t easy after seeing the same dentist in Florida for over 20 years. After researching options, I found Millennium Park Smiles, which is near my office in the Loop. The location is incredibly convenient in a historic building and just a few blocks from where I work. The entire staff was friendly, welcoming, and made everything feel easy from the time I made my appointment until I arrived. A special shoutout to Cindy, my hygienist. She was fantastic and genuinely made me feel comfortable throughout the cleaning. Dr. Baboulas was great as well. He was thorough, professional, and easy to talk to. No one tried to sell me anything I didn't need. Overall, it was a great first appointment, and I’m really happy to have found my new dental home in Chicago. Highly recommend.
I always have pleasant experiences at Millennium Park Smiles even though I had not so pleasant experiences as a child. Basically, the skinny was that after my parents' divorce, my mother got a job and her health insurance paid for my FIRST trip to the dentist at age 11. Yeah. The result being that I had 16 cavities. So, I was introduced to many episodes of pain, stress and fear. About 12 years later, at the same dentist's office, I chose Dr. Kontos as my dentist, and he has been gentle, down-to-earth and superb ever since. It was a complete break with the past and I followed him from the old office to where he is now. The team at Millennium Park Smiles, including Cindy, my hygienist, does an excellent job and you will see that outstanding service and attention to detail when you experience your checkup appointments.
I was always sooo nervous & dreaded to go to the dentist. Kristy who cleaned my teeth was fabulous & Dr. Kontos is wonderful!! THANK YOU for such a great dental experience - I won't dread it anymore!
The dentist John Kontos was the very best. He did a root canal and I had no pain during or after. I would give him a ten star rating on a scale of one to ten. His dental assistant and office staff was very courteous and professional.
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