Infective myositis, left lower leg

This code represents an inflammatory condition of the muscles in the left lower leg caused by an infection. It signifies the presence of an infectious agent directly affecting the muscle tissue, leading to symptoms such as pain, swelling, and tenderness in the specified limb.

This code is appropriate for patients diagnosed with myositis specifically attributed to an infectious etiology affecting the left lower leg. Documentation should clearly state the infectious nature of the myositis and specify the left lower leg as the affected anatomical site. This includes bacterial, viral, fungal, or parasitic infections directly involving the muscle.

• Ensure documentation explicitly states "infective" myositis and specifies the left lower leg. Do not use for non-infectious myositis (e.g., autoimmune).
• Always code the underlying infectious agent (e.g., B95-B97 for bacterial infections) as an additional diagnosis, if known and documented.
• Differentiate from cellulitis or abscess of the soft tissue without direct muscle involvement; this code specifically requires muscle inflammation due to infection.