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Accepting new patients

Millennium Park Smiles

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.

25 E Washington St #1707, Chicago, IL 60602
4.9(313 reviews)
Call Now(312) 263-7200Book OnlineWebsiteDirections

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

InvisalignInvisalignClear AlignersClear AlignersRetainersRetainers
GuidesHow much does Invisalign cost? →Clear aligner costs explained →Payment options & financing →

Who They Treat

Millennium Park Smiles provides orthodontic treatment for the following age groups:

Children
Ages 6–11
Teens
Ages 12–17
Adults
Ages 18+

Technology & Equipment

Millennium Park Smiles uses modern orthodontic technology to deliver precise, comfortable treatment.

3D Digital Scanning
Cone Beam CT (3D X-Ray)
Laser Dentistry
iTero/TRIOS
CBCT
laser

Orthodontists at this office

provider
headshot

Dr. Sara Khan, MD

NPI verified · no bio or photo on file

Lead OrthodontistNPI VERIFIEDAccepting New Patients
provider
headshot

Dr. Chris Baboulas, DDS

NPI verified · no bio or photo on file

NPI VERIFIEDAccepting New Patients
provider
headshot

Dr. Ronald Metelka, DDS, MS

NPI verified · no bio or photo on file

NPI VERIFIEDAccepting New Patients
provider
headshot

Dr. Reid Sigman, DDS

NPI verified · no bio or photo on file

NPI VERIFIEDAccepting New Patients
provider
headshot

Dr. John Kontos, DDS

NPI verified · no bio or photo on file

NPI VERIFIEDAccepting New Patients

Insurance accepted

10 plans listed
AetnaBlue Cross Blue ShieldCignaDelta DentalGuardianHumanaMetLifeRenaissance Dental
The practice works with insurance and files claims, per patient testimonials.

What patients say

Latest review 7 weeks ago

What patients praise

  • Dr. John Kontos is repeatedly credited with performing procedures like root canals and implants with little to no pain, even for patients who usually dread dental visits.
  • The Loop location near public transit makes it a convenient stop for downtown workers, and some patients travel from as far as Florida for appointments.
  • Reviews note the practice avoids pushing unnecessary treatments, recommending only what patients actually need.

Things to know

  • A few reviews describe front desk staff as rude or difficult during billing and scheduling issues.
  • Some reviews mention billing errors and disputes over insurance charges.

Who it suits

  • Anxious or nervous patients

Doctors patients mention

  • Dr. John Kontos · 60 reviews
  • Dr. Chris Baboulas · 4 reviews
Last 90 days
31 reviews
averaging 4.8★
Last 12 months
154 reviews
averaging 4.9★
Owner replies
96% of reviews
Compared with Chicago
Higher rated than 57%
of 28 practices we track
Reviews per month
23
Oct 2023Sep 2026
Reviews per month
Oct 20233
Nov 20230
Dec 20232
Jan 20244
Feb 20241
Mar 20244
Apr 20241
May 20240
Jun 20241
Jul 20243
Aug 20242
Sep 20242
Oct 20244
Nov 20242
Dec 20240
Jan 20250
Feb 20250
Mar 20250
Apr 20251
May 20258
Jun 202513
Jul 202514
Aug 202512
Sep 20257
Oct 202516
Nov 202523
Dec 202514
Jan 20265
Feb 202610
Mar 202611
Apr 202615
May 202613
Jun 202615
Jul 202613
Aug 202611
Sep 20264
Star ratings
  • 5★329
  • 4★15
  • 3★1
  • 2★0
  • 1★8
Average rating by year
  • 20174.6
  • 20185.0
  • 20194.8
  • 20205.0
  • 20215.0
  • 20225.0
  • 20234.6
  • 20244.7
  • 20254.8
  • 20264.9
1★5★
Treatments patients mention
  • Invisalign / clear aligners3
What patients talk about
PraiseCriticism
  • The orthodontist87 / 3
  • Friendly staff58 / 7
  • Gentle, comfortable care32
  • Clear explanations22
  • Scheduling & wait times14 / 6
  • Office & technology18
  • Cost, insurance & financing10 / 6
  • Location & hours11
What patients talk about
ThemePraiseCriticism
The orthodontist873
Friendly staff587
Gentle, comfortable care320
Clear explanations220
Scheduling & wait times146
Office & technology180
Cost, insurance & financing106
Location & hours110

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Recent reviews from Google

4.9
313 reviews
Deb Mac
Deb Mac
Edited a month ago
“

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.

Review from Google

Justin Chapman
Justin Chapman
Edited 2 months ago
“

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.

Review from Google

Paul Brush
Paul Brush
2 months ago
“

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.

Review from Google

Lynn Hedges
Lynn Hedges
3 months ago
“

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!

Review from Google

George Geanon
George Geanon
3 months ago
“

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.

Review from Google

Read all 313 reviews on Google →

Questions about this practice

What orthodontic treatments does Millennium Park Smiles offer?+
Millennium Park Smiles offers: Invisalign, Clear Aligners, Retainers.
Does Millennium Park Smiles accept dental insurance?+
Millennium Park Smiles accepts Aetna, Blue Cross Blue Shield, Cigna, Delta Dental, Guardian, and others.
Does Millennium Park Smiles offer free consultations?+
Yes, Millennium Park Smiles offers a free initial orthodontic consultation. Call (312) 263-7200 or book online to schedule.
Is Millennium Park Smiles accepting new patients?+
Millennium Park Smiles is currently welcoming new patients in Chicago, IL. Call (312) 263-7200 or book online to schedule.
Where is Millennium Park Smiles located?+
Millennium Park Smiles is located at 25 E Washington St #1707. Get directions: https://maps.google.com/?cid=16316233992577886547&g_mp=CiVnb29nbGUubWFwcy5wbGFjZXMudjEuUGxhY2VzLkdldFBsYWNlEAIYBCAA
What are the office hours for Millennium Park Smiles?+
Millennium Park Smiles office hours: Mon 8:00 AM–4:00 PM, Tue 8:00 AM–4:00 PM, Wed 8:00 AM–4:00 PM, Thu 8:00 AM–4:00 PM, Fri 8:00 AM–2:00 PM, Sat Closed–Closed, Sun Closed–Closed.
Does Millennium Park Smiles offer payment plans?+
Yes, Millennium Park Smiles offers flexible payment plans to make orthodontic treatment affordable.
Who are the orthodontists at Millennium Park Smiles?+
Millennium Park Smiles is staffed by Dr. Sara Khan, Dr. Chris Baboulas, Dr. Ronald Metelka, Dr. Reid Sigman, Dr. John Kontos.
What is the patient rating for Millennium Park Smiles?+
Millennium Park Smiles has a 4.9-star rating based on 313 patient reviews on Google.
How long has Millennium Park Smiles been in practice?+
Millennium Park Smiles has been providing orthodontic care since 1947, serving the Chicago, IL community for over 79 years.

Research with AI

ChatGPTPerplexityClaude
25 E Washington St #1707
Chicago, IL 60602
Get Directions
(312) 263-7200
mpschicago.com/
Book Online
info@mpschicago.com
Open in Google Maps
Accepting new patients
Est. 1947
Free Consultation
Payment Plans Available
Weekend Hours
Online Booking Available

Accessibility & Parking

Wheelchair Accessible Entrance
Wheelchair Accessible Parking
Wheelchair Accessible Restroom
CashCredit CardsDebit CardsContactless / NFCCareCredit
Mon8:00 AM – 4:00 PM
Tue8:00 AM – 4:00 PM
Wed8:00 AM – 4:00 PM
Thu8:00 AM – 4:00 PM
Fri8:00 AM – 2:00 PM
SatClosed
SunClosed

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