The physician performed an arthroscopy of TMJ with biopsy of soft tissue. What is the appropriate CPT code?

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The appropriate CPT code is 29804 (Arthroscopy, Temporomandibular Joint, Surgical). The temporomandibular joint is also referred to as the TMJ. Code 29800 is used for a diagnostic arthroscopy with or without an synovial biopsy, but the biopsy performed in this procedure was a soft tissue biopsy. Code 21010 is only used if the procedure was an open procedure. In this case, the procedure was not considered an arthroscopic procedure.

The Physician Performed an Arthroscopy of TMJ with Biopsy of Soft