Hydrops of gallbladder

This code signifies an abnormal accumulation of serous fluid within the gallbladder, leading to its distension. This condition typically arises from prolonged obstruction of the cystic duct, preventing bile outflow and causing the gallbladder to fill with clear, watery fluid rather than bile.

Assign this code when documentation explicitly states "hydrops of gallbladder" or describes a markedly distended gallbladder filled with clear fluid due to cystic duct obstruction, often in the absence of acute inflammation. Supporting documentation includes imaging reports (ultrasound, CT) detailing gallbladder distension and fluid content, and operative reports confirming the finding.

• Differentiate from acute cholecystitis (575.0) or chronic cholecystitis (575.1) where inflammation is the primary feature.
• Consider an additional code for the underlying cause of cystic duct obstruction, if known (e.g., cholelithiasis 574.xx).
• Ensure documentation clearly distinguishes hydrops from mucocele of the gallbladder, which involves mucus accumulation.