It's important not to use hospital or stand-alone ERs for minor illnesses or injuries, even after hours, especially when you have the option of Next Level Urgent Care centers for $20 per visit, the HISD Employee Health & Wellness Centers at no charge, or a walk-in retail clinic. Trips to the ER for minor health issues can be very costly. And if you go to an out-of-network ER for a non-emergency, you may be billed the entire balance.