Muscle wasting and atrophy, NEC, right hand

This code signifies a reduction in muscle mass and size in the right hand, not due to neurological disease, disuse, or other specific conditions classified elsewhere. It indicates a primary muscular issue leading to the atrophy.

Apply this code when documentation specifies muscle wasting or atrophy affecting the right hand, and the etiology is not clearly defined as neurogenic, disuse, or a congenital anomaly. This is appropriate for idiopathic cases or when the underlying cause is unknown or not classifiable to a more specific code.

• Ensure documentation explicitly states "right hand" to support laterality.
• Distinguish from disuse atrophy (M62.50-M62.59) or neurogenic atrophy (G71.0-G71.9) if the cause is known.
• Code any underlying conditions contributing to the atrophy, if identified, in addition to this code.