Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level
Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level
Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance
Injection of lower or sacral spine facet joint using imaging guidance, single level
Injection of substance into lower spine canal using imaging guidance
Injection of substance into middle or upper spine canal using imaging guidance
Aspiration and/or injection of fluid from large joint