Since 2005, Missouri attorneys have struggled with the interpretation and application of Missouri’s collateral source rule as it related to evidence of a plaintiff’s medical treatment bills. Generally speaking, the collateral source rule bars a defendant from introducing evidence that part of a plaintiff’s damages were paid for by a party other than the defendant; i.e., the plaintiff’s insurance company or some other form of public benefit. In Missouri, however, that rule had been applied to allow plaintiffs to present evidence of the total amount billed by a health care ...