Oth meniscus derangements, unsp lateral meniscus, left knee

This code signifies a non-specific derangement of the lateral meniscus in the left knee. This could encompass various types of meniscal pathology such as tears, cysts, or other structural abnormalities that are not further specified in the clinical documentation. It indicates an issue with the shock-absorbing cartilage on the outer side of the left knee joint.

Use this code when documentation clearly indicates a derangement of the lateral meniscus of the left knee, but the specific type or cause of the derangement (e.g., tear, degenerative, cyst) is not detailed. This code is appropriate when the physician notes "lateral meniscal derangement, left knee" without further elaboration on the nature of the derangement.

• Avoid using this code if the specific type of meniscal tear (e.g., bucket handle, radial, complex) is documented; instead, use a more specific M23.2- code.
• Ensure laterality (left knee) is explicitly stated in the medical record to support this code.
• If the documentation specifies a traumatic origin, consider an S83.- code for acute meniscal tears, followed by this code if a chronic derangement is also present.