By Monica E. Oss It's coming. Over the past couple of months, we've covered how all payers are introducing many variants of value-based reimbursement – The Management Transition To Value-Based Reimbursement Is All About The Performance Metrics, Moving To Value – Easy To Say & Hard To Do, and Pay-For-Value In Action. One of the big stories in the next 24 months will be the shift in payment methodology in the Medicare program – with $123 billion in spending moving to pay-for-value by 2018 (see System Reform, Value Purchasing, & The Future Of Behavioral Health). While the payers are moving ahead with the speed and inevitability…