FDA recommends the evaluation of biocompatibility of tissue contacting materials if the medical device contains components that come into direct or indirect contact with tissue. Biocompatibility testing is performed as per the standard ISO 10993-1. The biocompatibility studies shall perform even if the material and construction of the subject device and predicate device are the same, to prove the biological safety of the device. The reviewer will need information regarding detailed testing protocol and reports. The protocol shall include the details of study title and standard, the test article preparation, detailed test method- positive and negative controls, test parameters and acceptance criteria, analysis of results. The report shall include the analysis of test results, conclusions made from the test result, device photograph, etc.