AMA CPT® Assistant - 2011 Issue 12 (December)
Piriformis Muscle vs Sciatic Nerve (December 2011)
December 2011 page 8 Piriformis Muscle vs Sciatic Nerve There is a significant difference in the work and procedure, as well as intent, between an injection of the piriformis muscle and the perineural injection of the sciatic nerve. The sciatic nerve injection code (64445) should not be used to report a piriformis injection. A piriformis injection may be performed when piriformis syndrome is suspected. In this condition, the muscle is believed to impinge upon the sciatic nerve, which may pass close to or actually run through the muscle. Prolonged or repetitive use of the piriformis muscle, causing either hypertrophy...
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