SurModics Inc provides surface modification and in vitro diagnostic technologies to the healthcare industry. It operates in two key segments: medical devices and in vitro diagnostics. The medical devices segment contributes the majority of revenue and primarily offers surface modification coating technologies, including lubricity and biocompatibility characteristics and drug delivery capabilities. These technologies are primarily commercialized through licensing and royalty agreements with medical device manufacturers. The in vitro diagnostics business sells components for diagnostic test kits, including protein stabilizers, substrates, recombinant human antigens, and surface coatings for microarrays. SurModics generates the majority of its revenue in the United States.