An urgent care provider in Mission, Texas, South Texas Health System ER Mission is located at 900 E Expressway 83. The clinic treats non-life threatening injuries and illnesses, as well as routine immunizations and wellness visits. Most urgent care clinics are equipped to take x-rays and run EKG tests, urinalysis, blood tests, STD tests, pregnancy tests, drug tests, as well as flu and step tests. Traditionally patients at urgent care clinics typically see wait times of 30 minutes or less. However, COVID, flu and other issues have led to longer wait times. It is a good idea to call ahead or book an appointment online to lower your wait time. While urgent care is covered by Medicare Part B, not all clinics accept Medicare. The same applies to Medicaid. As with all insurance, we encourage you to call the clinic or visit their website to confirm that they are in-network with your health insurance.