You should submit your request for an external review to your health insurer within four months from the date that your insurer sent you the final decision.[8] Upon receipt of your request for external review, your health insurer will assign your case to an external review organization.[9]

Once your request is assigned to an external review organization, you have 10 days to submit supporting documentation to the external review organization. You should include documentation from your health care provider supporting why he or she prescribed the service or treatment and any other new information and documentation that you did not include with your previous request for an internal appeal.[10] Your insurer will notify you where to send the information.[11]