Health care services not covered by Medicare and reductions in premiums or cost sharing for Medicare-covered services. Additional benefits are specified by the MA Organization and are offered to Medicare beneficiaries at no additional premium. Those benefits must be at least equal in value to the adjusted excess amount calculated in the ACR. An excess amount is created when the average payment rate exceeds the adjusted community rate (as reduced by the actuarial value of coinsurance, copayments, and deductibles under Parts A and B of Medicare). The excess amount is then adjusted for any contributions to a stabilization fund. The remainder is the adjusted excess, which will be used to pay for services not covered by Medicare and/or will be used to reduce charges otherwise allowed for Medicare-covered services. Additional benefits can be subject to cost sharing by plan enrollees. Additional benefits can also be different for each MA plan offered to Medicare beneficiaries.