The injectable contract agent named Perflutren better known as Definity has caused a lot of confusion as many providers are billing the incorrect code and Medicare and most other large payors switched the code for this service in late 2005 and 2 years later it’s still showing up on medical billing and causing numerous delays and rejections on medical billing reimbursements. If you’re a service provider that is still billing A9700, you could face delays in getting paid–or even denials on your medical billing claims. If the carrier approves the main echocardiography procedure, then it will usually approve the use of Definity as contrast. If you are not sure of …