Posted By AHIMA Staff on Nov 11, 2019 Test your skills with a new coding question from Clinical Coding Workout every Monday. A patient is scheduled for a colonoscopy, but due to a sudden drop in blood pressure, the procedure is cancelled just as the scope is introduced into the rectum. Because of moderately severe mental retardation, the patient was given a general anesthetic prior to the procedure. How should this procedure be coded by the hospital? Assign the code for a colonoscopy with modifier 74. Assign the code for a colonoscopy with modifier 52. Assign no code because no procedure was performed. Assign an anesthesia code only. Source: AHIMA Press. Clinical Coding Workout, 2019. https://my.ahima.org/store/product?id=65592.