Cystic meniscus, other medial meniscus, right knee

This code signifies the presence of a fluid-filled sac (cyst) within the medial meniscus of the right knee. This condition can cause pain, swelling, and mechanical symptoms due to meniscal degeneration or trauma. The cyst is typically located within the substance of the meniscus itself, rather than being a parameniscal cyst.

Apply this code when documentation explicitly states a cystic lesion affecting the medial meniscus of the right knee. This diagnosis is often confirmed by MRI imaging demonstrating a meniscal cyst. Supporting documentation should detail the location and nature of the meniscal pathology.

• Ensure laterality (right knee) is clearly documented.
• Distinguish from parameniscal cysts (outside the meniscus) and other meniscal tears without cystic degeneration.
• Code any associated meniscal tears or other knee pathologies separately if documented.