SSM Health Urgent Care offers an alternative to the ER for the treatment of non-emergency common ailments and minor medical conditions. View a list of our key services. SSM Health Urgent Care in Wentzville, Missouri is conveniently located one mile north of Highway 70 on Wentzville Parkway, in front of SSM Health St. Joseph Hospital - Wentzville. Appointments are encouraged to avoid prolonged wait times. Our location is easily accessible to residents in Wentzville, Warrenton, Innsbrook, Moscow Mills, Troy, O’Fallon & Lake St. Louis. We accept patients of all ages.