Q. How is an extensive arthroscopic debridement of the shoulder defined in CPT?
A. An extensive arthroscopic shoulder debridement (CPT 29823) is coded when three or more discrete structures in the same shoulder are debrided. We will talk more about how “discrete structures” are defined in a moment.
If you’ve been coding orthopedic surgery for a number of years, you will recall that the line between a limited and extensive arthroscopic shoulder debridement prior to 2021 was a blurry one, especially in CPT itself. We had some great supplemental guidance from the AAOS and notable orthopedic surgery consultants over the years, but lining those guidelines up with language in the typical operative reports received was still a challenge.
With fresh guidelines published in 2021, the CPT manual now contains a formal definition of when we cross that line between limited and extensive debridement so we can approach this topic with more confidence. We also have a list with examples of what the AMA considers “discrete structures” within the CPT code description itself:
- The humeral bone
- The humeral articular cartilage
- The glenoid bone
- The glenoid articular cartilage
- Biceps tendon
- Biceps anchor complex
- Labrum
- Articular capsule
- Articular side of the rotator cuff
- Bursal side of the rotator cuff
- Subacromial bursa
- Foreign body(ies)
There are a couple of additional guidelines to be mindful of as you count your discrete structures to report an extensive arthroscopic debridement:
- Per the AMA, do not “count” an anatomic structure as a discrete structure to report CPT 29823 if another arthroscopic procedure is reported at that same anatomic site during the same surgery. For example, if an arthroscopic rotator cuff repair is performed, the side of the rotator cuff (articular vs. bursal) where the tear occurred would be debrided as a normal, routine part of repairing the rotator cuff tear. The articular and/or bursal sides of the rotator cuff should not then be counted as one of the 3 discrete structures to code CPT 29823.1
- Per CMS, a limited debridement is always included in another arthroscopic shoulder procedure on the same shoulder even if the debridement is performed in a different area of the shoulder. When it comes to extensive debridement, CMS states that, with three exceptions, extensive debridement is also included in another arthroscopic shoulder procedure on the same shoulder even if performed in a different area of the shoulder. The three arthroscopic procedures which are exceptions and allow reporting of CPT 29823 when performed in a different area on the same shoulder are CPT 29824 (arthroscopic distal claviculectomy); CPT 29827 (arthroscopic rotator cuff repair); and CPT 29828 (arthroscopic biceps tenodesis). So the CMS rules are even more stringent than the rules we have from the AMA.2
Resources:
1 CPT Assistant, December 1, 2020, copyright 2020, American Medical Association
2 NCCI Policy Manual 2025, Chapter 4, Section E.7: https://www.cms.gov/files/document/04-chapter4-ncci-medicare-policy-manual-2025finalcleanpdf.pdf
