Cmplx tear of medial mensc, current injury, unsp knee, init

This diagnosis code signifies a severe, recent injury to the medial meniscus of the knee, characterized by a complex tear pattern. A complex tear involves multiple tear configurations (e.g., horizontal, vertical, radial) within the meniscus, often leading to significant instability and symptoms. This code is used when the specific knee (left or right) is not documented.

Apply this code for patients presenting with acute knee pain, swelling, and mechanical symptoms (e.g., locking, catching) following a recent traumatic event, where imaging (MRI) confirms a complex tear of the medial meniscus. This code is appropriate for the initial evaluation and treatment of such an injury, prior to definitive surgical or non-surgical management.

• Ensure documentation specifies "complex tear" and "medial meniscus" for accurate code assignment.
• Verify that the encounter is the "initial encounter" for this specific injury.
• If the laterality (left or right knee) is documented, a more specific code should be used.