Ohio Subscriber
Answer: Since the method of correcting the problem here is a thermal debridement, rather than a surgical one, the unspecified arthroscopy code (29999, unlisted procedure, arthroscopy) should be used rather than 29877 (arthroscopy, knee, surgical; debridement/shaving of articular cartilage [chondroplasty]). Submit the operative report and a KISS letter explaining that the arthroscopy was used as a guide for the thermal debridement with the claim.