Noridian is reporting a spike in the number of providers being deactivated for not responding to Medicare revalidation notices. Revalidation notices are sent via e-mail two or three months before the revalidation due date but physicians can also go online to look up their revalidation date. For more information, go to the California Medical Association website at If you have questions or require assistance with your Medicare revalidation, please contact the ACCMA at (510) 654-5383.