Cystic meniscus, unspecified meniscus, right knee

This diagnosis code signifies the presence of a fluid-filled sac (cyst) within an unspecified meniscus of the right knee. It indicates a meniscal pathology where the specific meniscus involved (medial or lateral) is not documented.

Use this code when documentation clearly states a "cystic meniscus" in the right knee, but does not specify whether it is the medial or lateral meniscus. This code is appropriate when imaging reports or operative notes confirm the presence of a meniscal cyst without further meniscal identification.

• Avoid using this code if the specific meniscus (medial or lateral) is identified; instead, use a more specific M23.0- subcategory.
• Ensure documentation specifies "right knee" to justify this laterality.
• Consider co-reporting with codes for meniscal tear if present and documented.