Lesion of medial popliteal nerve, left lower limb

This code describes a specific nerve lesion affecting the medial popliteal nerve (also known as the tibial nerve) in the left lower limb. This condition typically results in sensory and/or motor deficits in the distribution of this nerve, which innervates muscles of the posterior leg and foot, and provides sensation to the sole of the foot.

Use this code when documentation clearly indicates a lesion, injury, or dysfunction of the medial popliteal nerve specifically on the left side. This applies to conditions such as entrapment neuropathies, traumatic injuries, or focal demyelination affecting this nerve. Supporting documentation should specify the nerve involved and the laterality.

• Ensure documentation specifies "medial popliteal nerve" or "tibial nerve" and not a more general lower limb nerve lesion.
• Verify laterality (left lower limb) is clearly stated; codes exist for the right and bilateral involvement.
• Consider an additional code for the underlying cause or etiology of the nerve lesion, if known and documented (e.g., trauma, compression).