For once, the final Outpatient Prospective Payment System payment rule issued by the Centers for Medicare & Medicaid Services generally has been praised by emergency medicine observers. There are, however, some new wrinkles you should be aware of, because they could save - or cost - you money: A separate coding category has been established for EDs that are not open 24/7. The payment rates are lower than those in full-time EDs, except for Level 5 visits. Imaging procedures have been grouped into five milies," and multiple tests on the same patient within the same family will be reimbursed as if only a single test was performed. Visits coded for "trauma response with critical care" will be reimbursed at a rate nearly three times as high as last year's rate.