Mercy Clinic Pediatrics O'Fallon, Wentzville and Winghaven

Mercy Clinic Pediatrics O'Fallon, Wentzville and Winghaven Currently open in O’Fallon, Wentzville and Winghaven

O’Fallon
300 Winding Woods suite 120

300 Winding Woods
O'Fallon, MO 63366

1502 West Meyer Road
Wentzville, MO 63385

07/02/2026

In celebration of Independence Day, our office will be closed Friday July 3 and Saturday July 4. We will re open Monday July 6th for regular buisness hours.

Stay safe and enjoy the holiday!

It’s that time of year again!!! We are starting to get busy with school and sports physicals for the upcoming school yea...
06/11/2026

It’s that time of year again!!!

We are starting to get busy with school and sports physicals for the upcoming school year and tryouts. Please make sure your child is up to date on their yearly check up if you are needing any forms filled out. Spots are filling up fast!

To schedule, call: 636-978-7902

Our office will be closed tomorrow 5/25 for Memorial Day! We will resume to normal hours, Tuesday 5/26 at 7:30. Have a ...
05/24/2026

Our office will be closed tomorrow 5/25 for Memorial Day! We will resume to normal hours, Tuesday 5/26 at 7:30.

Have a great Memorial Day weekend!

05/08/2026

We apologize, we are currently having issues with phones. IT is working on it. Thank you for your patience!

04/27/2026

Our office will be closing at 3 pm today due to the inclement weather! We will be back to normal office hours tomorrow 4/28.

Stay safe everyone!

Happy National Women’s Physician Day to this wonderful, amazing, intelligent group of women! Your dedication, hardworkin...
02/03/2026

Happy National Women’s Physician Day to this wonderful, amazing, intelligent group of women! Your dedication, hardworking and compassion to your patients never goes unnoticed! We appreciate you all so much and are proud to work with you! We can’t thank you enough for all you do!

01/26/2026

We will be open Monday January 26th starting at 10 am at all locations to allow everyone to arrive safely. If you have an appointment scheduled before that time, you will be notified. Thank you and stay safe!

01/24/2026

Due to the predicted inclement weather, our offices will be closed today January 24th.

Mercy Pediatrics will continue to follow the evidence-based AAP Immunization Schedule. Please follow the link below to l...
01/07/2026

Mercy Pediatrics will continue to follow the evidence-based AAP Immunization Schedule. Please follow the link below to learn more about immunizations and the diseases they prevent. If you have any questions, please discuss with your pediatrician.

Our 3 office locations: 12/24 8-10:30am O’Fallon Winding Woods Drive12/25 closed12/26 10am-4:00pm all 3 locations 12/27-...
12/23/2025

Our 3 office locations:

12/24 8-10:30am O’Fallon Winding Woods Drive
12/25 closed
12/26 10am-4:00pm all 3 locations
12/27- normal saturday hours: 8am- 10:30am

Nurse exchange number: 314-364-5277

Address

300 Winding Woods
O'Fallon, MO
63366

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm
Saturday 8am - 10:30am

Telephone

+16366986200

Website

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