- 64613--Chemodenervation of muscle(s); cervical spinal neck muscle(s) (e.g., for spasmodic torticollis, spasmodic dysphonia).
-The changes [to the 64613 descriptor] are an improvement,- says Neil Busis, MD, chief of the division of neurology and director of the neurodiagnostic laboratory at the University of Pittsburgh Medical Center at Shadyside, and clinical associate professor in the department of neurology, University of Pittsburgh School of Medicine. -They more accurately describe the procedure and some of its indications,- but are simply for clarification and do not reflect any differences in how you should apply the code.