Prph tear of lat mensc, current injury, unsp knee, subs

This code signifies a tear in the outer portion of the lateral meniscus, which is one of the C-shaped cartilage pads in the knee joint. The injury is recent or acute, and the specific knee (left or right) is not documented. This code is used for follow-up care after the initial treatment of the injury.

Apply this code when a patient presents for subsequent care (e.g., follow-up appointment, physical therapy, cast change) for a newly diagnosed peripheral tear of the lateral meniscus. This is appropriate when the medical record does not specify which knee is affected. It indicates that the initial treatment has already been rendered.

• Requires a seventh character "D" for subsequent encounter, indicating active treatment is ongoing.
• Only use when the laterality of the knee is truly unknown or not documented.
• Pair with an external cause code if the mechanism of injury is known and documented.