CMS has updated the Advance Beneficiary Notice of Noncoverage (ABN) (Form CMS-R-131). Providers can use the new form now, and mandatory use of the form will be on 8/31/2020. The form is valid through 06/30/2023. On or after 8/31/2020, issuing an ABN on an expired form will result in it being invalid.
The ABN is issued by providers to Original Medicare (fee for service - FFS) beneficiaries in situations where Medicare payment is expected to be denied. The ABN is issued in order to transfer potential financial liability to the Medicare beneficiary in certain instances. Guidelines for issuing the ABN can be found beginning in Section 50 in the Medicare Claims Processing Manual, 100-4, Chapter 30 (PDF).
Access the updated form and instructions here: https://www.cms.gov/Medicare/Medicare-General-Information/BNI/ABN.