Cystic meniscus, other lateral meniscus, unspecified knee

This code signifies the presence of a cystic lesion within the lateral meniscus of the knee, where the specific location within the lateral meniscus is not further specified. A meniscal cyst is a collection of synovial fluid that forms adjacent to or within a meniscal tear, often presenting as a palpable mass.

Apply this code when documentation confirms a diagnosis of a cystic meniscus affecting the lateral compartment of the knee, and the physician has not specified a more precise location (e.g., anterior horn, posterior horn). This code is appropriate when the laterality of the knee is also not documented.

• Ensure documentation clearly states "cystic meniscus" and specifies the "lateral meniscus."
• If the laterality (right or left knee) is known, use a more specific code from the M23.06- subcategory.
• Code any associated meniscal tear separately if documented, as the cyst is often secondary to a tear.