AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2026 Issue 2; Ask the Editor
Unstable Total Knee Replacement due to Malrotation of Femoral Component
A patient status post right total knee replacement was admitted for a revision procedure due to a femoral component malrotation that has caused recurrent dislocation of the patella. When referencing “Complication, joint prosthesis, internal, malposition,” in the ICD-10-CM Alphabetic Index, there is an instruction to “see Complications, joint prosthesis, mechanical, displacement.” This instruction leads to subcategory T84.02, Dislocation of internal joint prosthesis. Is this correct? What is the appropriate ICD-10-CM code assignment to capture the malrotation of the femoral component? ...
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Article Overview
This article addresses ICD-10-CM coding for a post–total knee replacement complication involving malrotation of a prosthetic component and resulting instability. It is aimed at coders and other revenue cycle professionals who need to interpret index guidance, distinguish among complication categories, and determine the most appropriate diagnosis code for a postoperative knee prosthesis issue. The discussion focuses on how the article approaches the complication category, the coding context for a right knee prosthesis, and the related ICD-10-CM guidance.
Why This Topic Matters
Accurate ICD-10-CM assignment for joint prosthesis complications affects diagnosis reporting, claims accuracy, and clinical documentation capture for postoperative orthopedic care.
What You Will Learn
- How this knee prosthesis complication is framed in ICD-10-CM terms
- How the article approaches index references for internal joint prosthesis complications
- What general coding context is considered for a right total knee replacement complication
- How postoperative encounter context is part of the coding discussion
Who Should Read This
- Medical coders
- Coding auditors
- Revenue cycle staff
- Orthopedic billing professionals
Codes Discussed
Code Ranges Discussed
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