Cystic meniscus, posterior horn of lat mensc, right knee

This code identifies a fluid-filled sac (cyst) located within the posterior aspect of the lateral meniscus in the right knee. This condition can cause pain, swelling, and mechanical symptoms such as clicking or locking of the knee joint. It often arises from meniscal tears or degeneration.

This code is appropriate when documentation clearly indicates a cystic lesion specifically affecting the posterior horn of the lateral meniscus in the patient's right knee. Diagnostic imaging reports (MRI) confirming the location and nature of the cyst, along with clinical findings, support its use.

• Ensure laterality (right knee) is explicitly documented.
• Distinguish from meniscal tears without cyst formation; if a tear is also present, code both conditions.
• Do not confuse with cysts in other meniscal locations or other knee structures.