Dual (two) diagnostic injections (identified with KX modifier) can be performed at diagnosis. After diagnosis, a maximum of four therapeutic SIJI can be performed in a rolling 12 months. Therefore, there is a maximum of six injections in first 12 months. If injections continue beyond 12 months there is a maximum of four in a rolling 12 months. Additional injections with the KX modifiers will not be accepted after the initial two diagnostic injections.