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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CPT® Assistant content is the official source for CPT® coding guidance. It is an instrumental tool when appealing insurance denials and validating coding to auditors. Monthly issues and an extensive archive provide comprehensive guidance on proper CPT® coding for past, present and upcoming code set releases. Archives date back to 1990 for historical use of codes, changes, rationales, coding tips and trends in the industry.

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