Myositis in cysticercosis

This code signifies inflammation of muscle tissue specifically caused by an infection with the larval stage of the Taenia solium tapeworm, known as cysticercosis. It indicates the presence of cysticerci within the muscles, leading to an inflammatory response.

Apply this code when documentation explicitly states myositis in the context of a confirmed or suspected cysticercosis infection. This typically occurs in patients presenting with muscle pain, weakness, or palpable nodules, and diagnostic imaging (e.g., MRI, CT) or biopsy confirms muscle involvement by cysticerci.

• Always code the underlying cysticercosis (B69.-) first, followed by this code for the specific muscle manifestation.
• Ensure documentation specifies "myositis" and links it directly to cysticercosis; do not use for general myositis without a confirmed parasitic etiology.
• Distinguish from other forms of parasitic myositis; this code is specific to cysticercosis.