Infective myositis, left hand

This code signifies an inflammatory condition of the muscles in the left hand caused by an infection. This infection leads to muscle pain, swelling, and weakness specifically affecting the musculature of the left hand.

Apply this code when documentation clearly indicates an infectious etiology for myositis localized to the left hand. Supporting documentation would include physician notes detailing signs of infection (e.g., fever, purulent discharge, positive cultures) alongside symptoms of myositis in the left hand.

• Ensure laterality (left hand) is explicitly documented; do not assume.
• Code the underlying infectious agent (e.g., bacterial, viral) as an additional diagnosis if identified.
• Differentiate from non-infectious myositis (e.g., autoimmune, toxic), which would require different codes.