Endoscopic examination of the colon to the caecum by colonoscopy, for a patient who has a high risk of colorectal cancer due to having had a previous colonoscopy that: (a) revealed 10 or more adenomas; or (b) included a piecemeal, or possibly incomplete, excision of a large, sessile polyp; other than a service associated with a service to which item 32230 applies Applicable 4 times in any 12 month period (H) (Anaes.)