The whole point of having the MA patient assign you their rights of appeal is so that you can appeal on behalf of the patient. For Medicare Advantage plans, appealing on behalf of the patient allows you to go through the 5-level Medicare appeal process which is not available to the provider if the provider is contracted with the plan. When you appeal on behalf of the facility, you get the number of internal (back to the payer) appeal levels that are described in your payer-provider contract or in the payer’s provider manual.
Best practice is to have the AOR form signed by the patient on admission. Some hospitals have struggled with implementing the process because it involves changes in forms, or adding new forms to registration packets, and questions arise about why every patient needs to sign the form even though not every admission will be denied. MA plans may have their own AOR form they provide for use, however, the CMS AOR form 1696 should be accepted by MA plans. You can download the form here: CMS 1696.