The National Health Surveillance Agency in Brazil, ANVISA, published further unique device identifier (UDI) guidance: RDC 591/2021. Some of Its requirements became mandatory on July 10, 2025. The background on Unique Device Identifier (UDI) requirements in Brazil can be described by the following: RDC 591/2021, RDC 884/2024, and Public Consultation 1.313/2025. Class IV medical devices must comp..