• Sierra San Antonio Medical Plaza, Serving Fontana

  • Urgent Care. Walk-in Clinic.

    Conveniently located on Sierra Lakes Parkway in Fontana just north of the 210 FWY, the Sierra San Antonio Medical Plaza provides urgent care and walk-in clinic needs.  

    You can make an online appointment for quick and convenient medical care including pediatric urgent care. Alternatively, you can walk-in and wait for the next available opening.

    Our urgent care hours are below.


    Sierra San Antonio Medical Plaza

    16465 Sierra Lakes Pkwy, Fontana, CA 92336
    909.434.1100 

    Services Offered:

    Urgent Care

    909.434.1150

    Monday - Friday
    9 am - 8 pm
      Weekends & Holidays
    9 am - 5 pm
      Walk-ins
    Welcome  
     

    URGENT CARE APPOINTMENT


    Get InQuicker by making your same-day appointment now at our Fontana location

    Sierra San Antonio Medical Plaza
    16465 Sierra Lakes Pkwy
    Fontana, CA 92336
    909.434.1150

     
     

    San Antonio Urgent Care at Sierra Lakes    

    Diagnostic Services and Treatment  

    • 3D Mammograms
    • Ultrasound
     
    • X-Ray
    • Imaging
     

    To schedule imaging services at any of our locations, please call 909.920.4726

    • Laboratory Services 909.434.1132
    • Physical Therapy 909.948.8080

    Click here to download the Outpatient Services map and information