2007 ICD-9-CM Procedure 37.90 Insertion of left atrial appendage device 37.90 is a specific code that can be used to specify a procedure 37.90 contains 6 index entries View the full Volume 3 37.* hierarchy 37.90 also known as: Left atrial filter Left atrial occluder Transseptal catheter technique Index entries containing 37.90: Implant, implantation device left atrial appendage 37.90 left atrial filter 37.90 left atrial occluder 37.90 Insertion device left atrial appendage 37.90 left atrial filter 37.90 left atrial occluder 37.90