Other congenital malformations of gallbladder

This code represents various congenital structural abnormalities of the gallbladder that are not otherwise specified or classified. These malformations are present at birth and can include conditions like agenesis (absence), hypoplasia (underdevelopment), or duplications of the gallbladder. These anomalies may or may not be symptomatic, depending on their severity and impact on biliary function.

Use this code when documentation specifies a congenital malformation of the gallbladder that does not fit more specific codes for atresia (Q44.0) or other specified anomalies. This code is appropriate for conditions such as a rudimentary gallbladder, a bilobed gallbladder, or an intrahepatic gallbladder when the specific type of malformation is not detailed enough for a more precise code. Documentation should clearly state "congenital malformation of gallbladder, not otherwise specified" or similar phrasing.

• Differentiate from acquired gallbladder conditions, which are coded elsewhere (e.g., cholecystitis, cholelithiasis).
• Ensure documentation specifies "congenital" to support the use of this Q-code.
• If a more specific congenital anomaly, such as biliary atresia, is documented, use the appropriate, more specific code (e.g., Q44.0).