Echinococcus multilocularis infection, multiple sites

This code signifies a parasitic infection caused by the larval stage of the tapeworm Echinococcus multilocularis, which has disseminated to multiple organs or anatomical locations within the body. This condition, known as alveolar echinococcosis, is characterized by the growth of tumor-like parasitic lesions that can invade surrounding tissues.

Use this code when documentation confirms a diagnosis of alveolar echinococcosis with evidence of parasitic involvement in more than one site, such as the liver and lungs, or liver and brain. Supporting documentation would include imaging reports (CT, MRI, ultrasound) showing multifocal lesions, biopsy results confirming E. multilocularis, and serological tests.

• Ensure documentation explicitly states "multiple sites" or lists specific affected organs beyond a single primary site.
• Do not confuse with cystic echinococcosis (hydatid disease) caused by Echinococcus granulosus.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, followed by codes for specific organ manifestations if further detail is required.