I don't think my original email came through showing what my question was referring to. Can anyone tell me more about this program- below:

CMS is conducting several large coordinated care, disease management and other demonstration under which private organizations will contract with CMS to provide specified services to beneficiaries enrolled in the traditional Fee-For-Service Medicare program.  In order to implement these larger demonstrations most efficiently, each of the demonstration organizations will be set up as an "Option 1 group health plan" in Medicare Group Health Plan system which is otherwise used for paying Medicare Advantage health plans.