From the CMS website:
The latest version of the ABN (with the release date of 3/2011 printed in the lower left hand corner) is now available for immediate use and can be accessed via the link below. In order for providers and suppliers to have time to transition to using the newly posted notice, mandatory use of this version begins on January, 1 2012. All ABNs with the release date of 3/2008 that are issued on or after January 1, 2012 will be considered invalid.
The mandatory use date has been changed from September of 2011 to January of 2012 to accommodate those providers and suppliers with pre-printed stockpiles of ABNs so that they have additional time to exhaust their supplies of the outgoing ABN.
Whenever you provide services that are not covered by Medicare, you must have your patient sign an ABN form. Please make sure you are using the correct version of the form. We at CMEonline recommend incorporating this form into your EMR so that you can print copies of it on demand.
More information can be found at the CMS website :