Once an application for disability compensation is filed, the VA starts to gather evidence to properly handle the claim.  Medical records from VA facilities or private medical providers will be requested.  Military personnel and treatment records will be requested and become part of the claim file.  In addition, the VA may request that you attend a medical exam to determine the status of each medical condition for which you are claiming benefits as well as to obtain its own “nexus” opinion as to whether a particular condition is linked to your service.  After the VA has finished its review of your claim, a rating decision will be issued advising you whether you have been found eligible for disability compensation.