Muscle wasting and atrophy, NEC, right lower leg

This code signifies a reduction in muscle mass and size in the patient's right lower leg, not attributable to a specific underlying disease process classified elsewhere. It represents a general diagnosis of muscle atrophy affecting this specific anatomical site.

Apply this code when documentation indicates muscle wasting or atrophy of the right lower leg without a more specific diagnosis (e.g., neurological disorder, disuse atrophy due to fracture). Supporting documentation should clearly state "muscle atrophy" or "muscle wasting" and specify the right lower leg as the affected area.

• Ensure the documentation explicitly states "right lower leg" to support laterality and anatomical specificity.
• Always search for a more specific underlying cause of the atrophy (e.g., neurological conditions, disuse, malnutrition) before assigning this "not elsewhere classified" code.
• Do not use this code if the atrophy is a direct result of a primary neurological condition; instead, code the neurological condition.