On March 24, 2026, the Centers for Medicare & Medicaid Services (“CMS”) issued a final rule establishing a Health Insurance Portability and Accountability Act (“HIPAA”) standard for electronic signatures in connection with health care claims attachments transactions, as well as standards governing the electronic exchange of claims attachments more generally. The rule adopts the first-ever standards for health care claims attachments under HIPAA. CMS explains that the standards are intended to eliminate reliance on manual processes, such as faxing and mailing, which the agency believes will lead to cost and time savings, faster care delivery, enhanced security, and improved efficiency.