I believe that John is describing it correctly.
Here is a CMS FAQ explaining that:
1. PQRS is entirely separate and you can get it along with others
2. eRx and EHR can NOT be received in the same year (from Medicare; Medicaid EHR is separate).
I think that for Medical Economics to describe it as "double-dipping" is unfair. The inability to receive both incentives is/was a surprise to many, and CMS has been instructed to "clarify and simplify" the programs.
To answer Joseph's question: "if one got ERx incentive why bother struggling with MU?"...your MU incentive would be much higher than the eRx (75% of Medicare receipts with a cap of $18k received vs. 1% in 2011 with no cap).
