Final answer:
The ICD-10 codes for abdominal pain due to gastritis versus cholelithiasis are K29.70 for unspecified gastritis without bleeding, and K80.20 for calculus of gallbladder without cholecystitis or obstruction. The final ICD-10 code used would depend on the clinician's assessment of the primary diagnosis.
Step-by-step explanation:
The ICD-10 code for a patient admitted with abdominal pain in the right upper quadrant with a workup that included an EGD showing mild gastritis and an abdominal ultrasound that was positive for gallstones in the gallbladder would likely be based on the final diagnosis. Two potential scenarios can result from the reported symptoms and findings: gastritis or cholelithiasis (gallstones).
For gastritis, the ICD-10 code would be K29.70 for Gastritis, unspecified, without bleeding. For cholelithiasis, the ICD-10 code would be K80.20 for Calculus of gallbladder without cholecystitis without obstruction. The correct code(s) would depend on the clinician's determination of the primary cause of the right upper quadrant pain.
An endoscopic ultrasound is a valuable diagnostic tool that can help in diagnosing severe pancreatitis and detecting gallstones, thus potentially supporting the cholelithiasis diagnosis.