ER Katy is where you are treated like family! When you or a member of your family is having a medical emergency, every second counts. If your injury or illness is life threatening or requires immediate attention after hours, you need an ER. Freestanding Emergency Rooms are full-service Emergency Rooms that are state-licensed and operate independently of a hospital. ER Katy is a state-of-the-art Emergency Room, without the long wait times of hospital emergency rooms. All patients are seen by one of our Board Certified Emergency Medicine Doctors.