Cystic meniscus, unspecified medial meniscus, right knee

This diagnosis code signifies the presence of a cystic lesion within the medial meniscus of the right knee, where the specific type or further detail of the cyst is not documented. A meniscal cyst is a fluid-filled sac typically associated with a meniscal tear, often presenting as a palpable mass or localized pain.

This code is appropriate when documentation specifies a cystic meniscus affecting the right medial meniscus, but lacks further detail regarding the cyst's characteristics (e.g., parameniscal, intrameniscal). It should be used when imaging reports (MRI, ultrasound) or surgical findings confirm the presence of such a cyst without further specification.

• Ensure the documentation clearly specifies the right knee and medial meniscus.
• If the documentation provides more detail about the cyst (e.g., parameniscal), a more specific code from the M23.0 subcategory may be appropriate.
• Always look for associated meniscal tears (e.g., M23.2-) as these are often the underlying cause and should be coded separately if documented.