Unable to find gallbladder in ultrasound. Is that bad?

Repeat study. Make sure you haven't had it removed (sometimes folks forget)! most commonly the gallbladder is contracted and repeating the exam (after 12 hours of fasting) is advised. A contracted gallbladder can occur in the setting of chronic cholecystitis. Sometimes the gallbladder is in a location that makes it hard for the technologist to find. Lastly, some people are born without them (very rare!).