Lesion of medial popliteal nerve, bilateral lower limbs

This code signifies a medical condition involving damage or dysfunction of the medial popliteal nerve (also known as the tibial nerve) affecting both lower limbs. This typically presents as sensory disturbances, motor weakness, or pain in the posterior leg and sole of the foot, bilaterally.

Apply this code when documentation explicitly states a lesion or neuropathy of the medial popliteal nerve impacting both the right and left lower extremities. Supporting documentation should include neurological exam findings, nerve conduction studies, or electromyography confirming bilateral tibial nerve involvement.

• Ensure documentation specifies bilateral involvement; otherwise, a unilateral code (G57.41 or G57.42) would be more appropriate.
• Distinguish from common peroneal nerve lesions (G57.3-) which affect different muscle groups and sensory distributions.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity impacting treatment.