Below part of private response that I received from the AMA CPT Network
"......codes 64517 and 64530 are reported once during a session when performing injection(s). Therefore, although codes 64530, Injection, anesthetic agent; celiac plexus, with or without radiologic monitoring, and 64517, Injection, anesthetic agent; superior hypogastric plexus, may require one, two, or more injections during the session, they are reported only once, irrespective of the number of injections."