Clarification: Patellofemoral compartment arthroplasty

Coding Clinic for HCPCS Third Quarter 2021 published an article titled “Knee arthroplasty procedures.” On page three there is a table that shows CPT code 27438 is assigned for patella arthroplasty and in the brief explanation it states that this code is “for the replacement of the patella-femoral compartment.”  However, there is a CPT Assistant from February 2021 that states unlisted code 27599 should be used for the replacement of the patellofemoral compartment as the procedure has greater effort and more work than what is done in 27438 . We are asking Coding Clinic for HCPCS to revisit the Third Quarter 2021 article. ...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This short clarification article is aimed at coders and revenue cycle professionals working with knee arthroplasty procedures. It discusses a dispute between published guidance sources, references the relevant CPT context, and explains that the issue was reviewed again in light of prior published guidance. The article is relevant to readers following orthopedic coding updates, especially those monitoring CPT and Coding Clinic interpretations.

Why This Topic Matters

Conflicting published guidance on a procedure can affect coding consistency, claim submission, and compliance. This article matters because it highlights the need to reconcile authoritative sources when assigning codes for knee-related arthroplasty services.

What You Will Learn

  • How the article frames a clarification issue involving patellofemoral compartment arthroplasty.
  • How published coding guidance sources are discussed in relation to the procedure.
  • Why the topic is relevant to coding for orthopedic knee arthroplasty services.
  • What kinds of source materials are referenced when clarifying a procedure coding question.

Who Should Read This

  • Medical coders
  • Coding auditors
  • Revenue cycle staff
  • Orthopedic billing teams
  • Compliance professionals

Codes Discussed


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