Cystic meniscus, posterior horn of medial meniscus, l knee

This code identifies a fluid-filled sac (cyst) located specifically on the posterior horn of the medial meniscus in the left knee. This condition can cause pain, swelling, and mechanical symptoms within the knee joint.

Apply this code when documentation clearly indicates a cystic lesion affecting the posterior horn of the medial meniscus of the left knee, often diagnosed via MRI. It is appropriate for both acute and chronic presentations of this specific meniscal pathology.

• Ensure the documentation specifies "cystic meniscus" and not just a meniscal tear, as these are distinct conditions.
• Verify the laterality (left knee) and the specific meniscal horn (posterior horn of medial meniscus) are clearly stated.
• Do not confuse with codes for meniscal tears without cyst formation, or cysts located in other parts of the meniscus or knee joint.