Our Office & Hours

Union Mill Pediatrics

Our office staff works hard to ensure patient comfort and convenience. We are located in Southwestern Fairfax County adjacent to Prince William County. To help you better understand our office operations, we have included the information you need about our hours and location below.

Union Mill Pediatrics
13880 Braddock Road
Suite 201
Centreville, VA 20121
(703) 802-6304

*We provide evening appointments Monday through Thursday. Our phones are open from 8:00 AM - 5:00 PM to request evening appointments, no walk-ins please. Union Mill Pediatrics phones are open M-F 8:00-5:00.

**Saturday - Reach our triage line 8:30 AM - 10:00AM by dialing 703-802-6304, for urgent matters only

For SICK visits only. Established patients only.

Walk in hours are:

Monday through Friday
8:00 AM to 9:00 AM

9:00 AM to 10:00 AM

No appointment is necessary.

The Walk-In Clinic is for minor illnesses (illnesses with symptoms lasting less than 5 days).***

  • The walk-in hours are for established patients over 3 months of age.

  • You must be signed in during the walk in time period to be seen during the walk in clinic.

  • The Walk-In Clinic is managed on a first–come, first-served basis, except for emergencies.

  • There are NO walk-in hours on holidays.

  • If you attempt to walk-in outside of these established times we will do our best to fit you in to one of our same day sick appointments as soon as possible.

***For long or involved issues, you must make an appointment so we can set aside an appropriate amount of time for your visit. If you come to Walk-In hours with a problem that is ongoing (more than 5 days), you will be asked to schedule an appointment for a different time. Also if you wish to see a specific provider please call to schedule an appointment.

Scheduled Office Closings - 2019/2020

Memorial Day - May 25


Independence Day - July 4


Labor Day - September 7


Thanksgiving Day - November 28


Christmas Day - December 25


New Years Day - January 1


Contact Us

Our Location

13880 Braddock Road Suite 201 Centreville, VA 20121

Hours of Operation

*Our phones are only open 8AM to 5PM M-F and Saturday 8:30-10. Below are the times that patients are scheduled. We close for lunch 12:25-1pm

Union Mill Pediatrics


7:30 am-7:30 pm


7:30 am-7:30 pm


7:30 am-7:30 pm


7:30 am-7:30 pm


8:00 am-6:00 pm


9:00 am-10:00 am