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

This code signifies a non-traumatic, degenerative, or unspecified tear or abnormality of the posterior horn of the lateral meniscus. It indicates a derangement that is not further specified as a bucket-handle, complex, or other specific type of tear. The affected knee is not specified as left or right.

Use this code when documentation indicates a posterior horn lateral meniscal derangement without specifying the exact nature of the tear (e.g., "degenerative tear of posterior horn lateral meniscus" or "meniscal tear, posterior horn lateral meniscus, unspecified type"). This code is appropriate when the laterality of the knee is not documented.

• Always strive for greater specificity regarding the type of meniscal tear (e.g., bucket-handle, complex) and laterality (left or right knee) if documented.
• Avoid using this code if the documentation clearly specifies a traumatic origin; instead, refer to codes in the S83.2- series for traumatic meniscal tears.
• Ensure the documentation explicitly mentions the posterior horn of the lateral meniscus; do not use for medial meniscus involvement.