Colonoscopy can be costly for several reasons. One reason is that the procedure requires specialized equipment, such as a colonoscope, which can be expensive. Additionally, the procedure is typically performed by a specialist, such as a gastroenterologist, who may charge higher fees than a general practitioner. The cost may also include the cost of sedation or anesthesia during the procedure. Finally, the cost may also include the cost of any necessary follow-up care or treatment.