For the past year, in almost every meeting that I've attended that focused on provider reimbursement from health plans, the number one concern is the definition of "value." The question—if we are going to reimburse some organizations more than others for a particular service based on the "value" of that service, who defines "value" and how is it measured? As a reminder, the "value equation" is quite simple—"performance" for the "cost." But while cost is easy to determine, defining "performance" is a continuing challenge in the health and human service field. Where are we now? The big payers—Medicare, Medicaid, and…