Oth meniscus derangements, other medial meniscus, left knee

This diagnosis code signifies a non-traumatic, unspecified derangement of the medial meniscus in the left knee. It indicates a structural abnormality or dysfunction of the meniscus that is not explicitly a tear, cyst, or discoid meniscus.

Use this code when documentation specifies a "derangement," "pathology," or "disorder" of the left medial meniscus without further specificity regarding the type of derangement (e.g., not a tear, cyst, or discoid meniscus). This code is appropriate when the physician's notes indicate a medial meniscal issue on the left side that doesn't fit more specific M23.3x categories.

• Ensure the documentation clearly specifies the medial meniscus and the left knee.
• Avoid using this code if a more specific meniscal derangement (e.g., tear, cyst) is documented; look for codes in M23.2 or M23.0.
• This code is for non-traumatic derangements; if the derangement is due to a current injury, a traumatic meniscus tear code (S83.2-) would be more appropriate.