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Ask a Rev Cycle Expert: Piriformis Muscle Injection?

Question:

What is the correct Current Procedural Terminology (CPT®) code for an injection into the piriformis muscle? We were looking at codes 20552 versus 64642.

Answer:

An injection of the piriformis muscle is reported CPT® code 20552 Injection(s); single or multiple trigger point(s), 1 or 2 muscle(s) because the injection is into the muscle. CPT® code 64642 Chemodenervation of one extremity; 1-4 muscle(s) is an injection into the nerve. Ultrasound guidance, if performed, may be reported separately.

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