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

This code signifies a non-traumatic tear, degeneration, or other structural abnormality affecting the posterior horn of the lateral meniscus in the patient's left knee. It describes a derangement that is not explicitly classified as a bucket-handle, discoid, or other specified meniscal tear.

Apply this code when documentation specifies a derangement of the posterior horn of the lateral meniscus in the left knee, without further detail on the specific type of tear (e.g., radial, horizontal). This code is appropriate for conditions like meniscal degeneration, fraying, or an unspecified tear identified during arthroscopy, MRI, or clinical examination.

• Ensure the documentation clearly specifies the posterior horn of the lateral meniscus and the left knee.
• Differentiate from M23.355 (posterior horn of lateral meniscus, right knee) and M23.359 (unspecified knee).
• If a specific type of tear (e.g., bucket-handle) is documented, a more specific code from the M23.2- category should be used.