This patient undergoes a gallbladder sonogram due to epigastric pain. the report indicates that the visualized portions of the liver are normal. no free fluid noted within morison's pouch. the gallbladder is identified and is empty. no evidence of wall thickening or surrounding fluid is seen. there is no ductal dilation. the common hepatic duct and common bile duct measure 0.4 and 0 cm, respectively. the common bile duct measurement is at the upper limits of normal. cpt code? icd 10-cm code?