Cystic meniscus, unsp medial meniscus, unspecified knee

This code signifies the presence of a cystic lesion within the medial meniscus of the knee, without further specification of laterality (left or right). A meniscal cyst is typically a ganglion cyst arising from a meniscal tear, often presenting as a palpable mass or localized pain.

Apply this code when documentation confirms a cystic meniscus affecting the medial compartment of the knee, but the specific knee (left or right) is not documented. This is appropriate when imaging reports (MRI, ultrasound) or surgical findings identify a medial meniscal cyst without laterality.

• Ensure the documentation explicitly states "medial meniscus" and "cystic" to support this code.
• If laterality (left or right knee) is specified, use the more precise M23.001 (right) or M23.002 (left) codes.
• This code should be sequenced as a primary diagnosis when the cystic meniscus is the reason for the encounter.