We use decision support for that. We have the colonoscopy rule setup to look at people from 50 to 75 and have it reoccur every year. Then when we get a result or the patients tells us we document in the rule and change the timing of the rule to just pop up again when the patient is due 1 to 10 years. You can then go run a rule on health maintenance and select the colonoscopy rule and query if it is due. You should get a list of those patients that are due.
