Oth meniscus derang, posterior horn of lat mensc, right knee

This code signifies a non-traumatic, unspecified derangement or tear of the posterior horn of the lateral meniscus in the right knee. It indicates a structural abnormality or injury to this specific part of the meniscus, not caused by an acute external force.

Use this code when documentation specifies a derangement or tear of the posterior horn of the lateral meniscus in the right knee, and the cause is not explicitly traumatic. This often applies to degenerative tears, meniscal cysts, or other non-acute meniscal pathologies identified during imaging (e.g., MRI) or arthroscopy.

• Ensure the documentation clearly specifies "posterior horn" and "lateral meniscus" of the "right knee."
• Distinguish from traumatic tears (S83.2- series) if an acute injury is documented as the cause.
• Do not use for anterior horn or medial meniscus derangements; specific codes exist for those locations.