Echinococcus multilocularis infection, other

This code signifies an infection caused by the larval stage of the tapeworm Echinococcus multilocularis, manifesting in organs other than the liver or lungs. This parasitic disease, known as alveolar echinococcosis, typically presents as a slow-growing, tumor-like lesion that can invade surrounding tissues.

Apply this code when documentation confirms alveolar echinococcosis affecting sites such as the brain, bones, spleen, or kidneys. This diagnosis is often supported by imaging studies (CT, MRI) showing characteristic lesions, serological tests, and sometimes biopsy findings.

• Differentiate from Echinococcus granulosus infections (cystic echinococcosis), which have different ICD-9-CM codes.
• Ensure the medical record explicitly states "multilocularis" and the affected "other" site to justify this specific code.
• Consider additional codes for specific organ involvement or complications arising from the parasitic infection.