Read the following discharge summary:

hospital course

mrs. collach was admitted to the medical service. she was placed on npo status and given ivf and analgesics. an ultrasound revealed gallstones in the common bile duct as the etiology for mrs. collach's pancreatitis. surgery was consulted. on hospital day 2, mrs. collach was taken to the or for laparoscopic choledocholithectomy and cholecystectomy. she tolerated the procedure well. she began a postoperative refeeding plan with a low-protein, low-fat diet. she tolerated advancing the diet, and 2 days after her surgery, her pain had improved enough that she was discharged home.

according to this summary
after a health care provider has gathered information from the patient and performed any necessary investigations, the health care provider then formulates a(n) which could be a diagnosis, identification of the problem, or a differential diagnosis.