Echinococcus granulosus infection of liver

This code identifies a parasitic infection of the liver caused by the larval stage of the tapeworm Echinococcus granulosus, commonly known as hydatid disease or cystic echinococcosis. The infection typically results in the formation of one or more cysts within the liver parenchyma, which can grow slowly over time.

Use this code when documentation confirms a diagnosis of hydatid disease specifically affecting the liver, often identified through imaging studies (e.g., ultrasound, CT, MRI) showing characteristic hepatic cysts, and supported by serological tests or histopathological findings. This code applies to both symptomatic and asymptomatic hepatic involvement.

• Ensure documentation specifies the liver as the affected organ; other organ involvement would require different codes.
• Distinguish from alveolar echinococcosis (caused by Echinococcus multilocularis), which has a distinct ICD-9-CM code.
• Look for terms like "hydatid cyst of liver," "cystic echinococcosis of liver," or "Echinococcus granulosus infection, hepatic."