Echinococcus multilocularis infection, unspecified

This code signifies an infection caused by the parasitic tapeworm Echinococcus multilocularis, leading to alveolar echinococcosis. This condition is characterized by the formation of aggressive, tumor-like cysts, primarily in the liver, but can metastasize to other organs. The "unspecified" nature indicates that the specific organ or site of infection is not documented.

Use this code when documentation confirms an Echinococcus multilocularis infection, but the precise anatomical location of the parasitic cysts is not specified. This may occur during initial diagnosis before extensive imaging, or if the documentation simply states "alveolar echinococcosis" without further detail.

• Avoid using this code if the specific organ involved (e.g., liver, lung) is documented; instead, use a more specific code from the 122 series.
• Ensure the documentation clearly states Echinococcus multilocularis and not Echinococcus granulosus, which causes cystic echinococcosis (hydatid disease) and codes to a different category.
• Always query the provider for greater specificity regarding the site of infection if only "unspecified" is documented, to allow for more precise coding.