Early July rules issued by the Centers for Medicare and Medicaid included proposed calendar year 2010 payments for both hospital outpatient procedures and ambulatory surgical centers, notes Sg2 VP Natasha Goburdhun. Unlike past years, these rules propose few dramatic changes to existing payment structures or requirements, Goburdhun says, but it is clear that the amount of money flowing from CMS for OP services will be less than in previous years.