FDA has developed this guidance document to assist industry in preparing Premarket Applications (PMAs), Humanitarian Device Exceptions (HDEs), Investigational Device Applications (IDEs), Premarket Notifications (510(k)s), and De Novo requests for medical devices that come into direct contact or indirect contact with the human body in order to determine the potential for an unacceptable adverse biological response resulting from contact of the component materials of the device with the body. The purpose of this guidance is to provide further clarification and updated information on the use of International Standard ISO 10993-1, « Biological evaluation of medical devices – Part 1: Evaluation and testing within a risk management process » to support applications to FDA. This guidance document also incorporates several considerations, including the use of risk-based approaches to determine if biocompatibility testing is needed, chemical assessment recommendations, recommendations for biocompatibility test article preparation for devices with submicron or nanotechnology components and for devices made from in situ polymerizing and/or absorbable materials, and biocompatibility recommendations when certain materials only contact intact skin…