There are a variety of reasons for upper GI pain after eating, including, GERD, an ulcer, or inflammation of the upper
I would consider an upper endoscopy
, or upper
GI series, to evaluate.
If negative, a CT scan or ultrasound can be considered to image the liver or gallbladder. If the pain localizes to the upper left quadrant, the CT scan would be able to image the pancreas and spleen as well.