Hi Dr. Carcamo,
I believe I know what you are trying to do, and unfortunately I don't believe AC can do it at this time. You can mark a patient as a No Show in AC (we call it a DNKA.. Did Not Keep Appointment). This is done by either clicking the red X under the patient list as Bert suggested, or right clicking on the appointment and selecting DNKA. This will allow you to mark the appointment as a no show and send the notification to the provider. The provider would then double click on the email to open the Addendum and then save that addendum to the chart. Once those addendums are saved to the chart you can see how many times that particular patient has no showed (it's on the summary sheet in the lower right corner). You cannot, however, see how many patients no showed in a given time frame (which I believe is what you are looking for).
I have submitted an issue to DEV about this to see about adding the ability in a future release. To give the issue more weight, I would also ask that you submit a "Recommended Improvement" ticket. The more of these that get submitted for a particular issue, then the more likely it is they will get it in quicker. To submit this type of ticket, click on "Help" and then "Recommended Improvements" right in the program.
