It is listed in Version 5.1.7. If you have not updated your Amazing Charts version, then you can add it manually as follow:
In the main window, press 'Control A' to get to the admin options, or, at the top of the screen, go to View > Administrator Options > Enter Password > Tools > Modify CPT Database (Modify Available Codes) > Enter the CPT Code, price it ($0.00) name it whatever you want (Medicare e-RX is what we called it in our previous version). You can then add this to your quick codes list as well, also editable through admin options.