Infective myositis, left thigh

This code signifies an inflammation of the muscle tissue in the left thigh caused by an infection. This condition can result from bacterial, viral, fungal, or parasitic pathogens directly invading the muscle. Patients typically present with pain, swelling, tenderness, and warmth in the affected area.

Apply this code when documentation clearly indicates an infectious etiology for myositis affecting the left thigh. This includes cases of pyomyositis, viral myositis, or other confirmed infective processes. Supporting documentation should specify the location (left thigh) and the infectious nature of the myositis.

• Ensure the documentation specifies "infective" myositis and not another type (e.g., inflammatory, toxic).
• Verify the laterality is explicitly stated as "left thigh"; avoid using unspecified laterality codes if the documentation is clear.
• Consider sequencing an additional code to identify the specific infectious agent, if known and documented (e.g., B95-B97 for bacterial agents).