Sprain of medial collateral ligament of knee

This code signifies an injury to the medial collateral ligament (MCL) of the knee, characterized by stretching or tearing of its fibers. It typically results from a valgus stress applied to the knee, often during sports activities or falls. The injury can range from a mild stretch to a complete rupture.

This code is appropriate for documenting a diagnosed sprain or tear of the MCL of the knee. Supporting documentation should include a physical examination noting tenderness over the MCL, valgus instability, and imaging findings (e.g., MRI) confirming the ligamentous injury.

• Differentiate between a sprain (stretch/partial tear) and a complete rupture, as more specific codes may exist for complete tears in other code sets.
• Ensure documentation specifies the affected knee (left or right) if laterality is available in the coding system being used.
• Avoid using this code for other knee ligament injuries (e.g., ACL, PCL, LCL) or general knee pain without a confirmed MCL sprain.