The normal business hours are from 7:30 am – 6:00 pm CDT Monday through Friday. Premier Customer direct billing submissions will be processed on weekends, but there are no official business hours. Please feel free to order during non-business hours, but be aware that you may not receive your pass codes until the following day. If you need to call us anytime you can call: (870)215-6572 or (870)634-6303 with the exception of Sundays or after 10:00 p.m. CST.