Question: New Hampshire Subscriber Answer: Best bet: Also, you cannot code the acute pain diagnosis code per the ICD-9 guidelines unless the provider's documentation specifically indicates "acute": "If the pain is not specified as acute or chronic, do not assign codes from category 338, except for post-thoracotomy pain, postoperative pain, neoplasm-related pain, or central pain syndrome." Don't forget: • 64612 -- Chemodenervation of muscle(s); muscle(s) innervated by facial nerve (e.g., for blepharospasm, hemifacial spasm) • 64613 -- ... neck muscle(s) (e.g., for spasmodic torticollis, spasmodic dysphonia) • 64614 -- ... extremity(s) and/or trunk muscle(s) (e.g. for dystonia, cerebral palsy, multiple sclerosis).