• Fontana Urgent Care Center at Sierra San Antonio Medical Plaza


    Due to COVID-19 precautions, the following information is provided for our patients and their families.

    Urgent Care Patients

    Due to COVID-19 precautions, all San Antonio Regional Hospital Urgent Care patients are screened for fever and respiratory symptoms. This extra screening helps us meet our commitment to provide a safe environment for everyone entering the urgent care.

    When you arrive at the urgent care parking lot, call the appropriate number listed below from your vehicle.

    Fontana location:                                  909.434.1150

    • Urgent care staff will screen the patient over the phone.
    • If this screening reveals potential COVID-19 symptoms, the patient will be directed to the COVID-19 tent to be evaluated by a provider.
    • Patients who are not identified with potential COVID-19 symptoms will be directed to enter the urgent care.
    • All patients entering the urgent care must wear a mask.
    • In accordance with COVID-19 precautions, no visitors are permitted in the urgent care. The only exception is that one (1) parent or legal guardian may accompany a minor under age 18.

    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.

    Monday - Friday
    9 am - 8 pm
      Weekends & Holidays
    9 am - 5 pm

    16465 Sierra Lakes Pkwy, Fontana, CA 92336



    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

    San Antonio Urgent Care at Sierra Lakes    

    In addition to Urgent Care, these outpatient services are available:

    Radiology Services  

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

    To schedule imaging services at any of our locations, please call 909.948.8166

    Click here to download the Outpatient Services map and information