SERPINA9 (Serpin Family A Member 9) is a Protein Coding gene. Diseases associated with SERPINA9 include Ectopic Cushing Syndrome. GO annotations related to SERPINA9 include serine-type endopeptidase inhibitor activity. Protease inhibitor that inhibits trypsin and trypsin-like serine proteases (in vitro). Inhibits plasmin and thrombin with lower efficiency (in vitro).