Patient IDs

Patient IDs


The patient ID, also referred to as their account number, uniquely identifies each patient so you cannot have two patients with the same ID. The patient list lets you sort alphabetically either by patient name or by patient ID so looking up a patient by their ID is quick and simple. The patient ID is printed in box 25 of the CMS-1500 claim form.


A patient ID can contain numbers, upper case letters, and other characters. A practice preferences option lets you tell the program whether it should assign the next highest number when a you add a new patient. For this to work effectively, all of your patient IDs should contain the same number of characters and in the same format. For example, all IDs could be five numerical digits followed by a dash and a letter.


Automatically Assigning Patient IDs

To assign a new Patient ID, Aeris, looks at the last ID in an alphabetically sorted list of the IDs. It then increments the right-most letter or number. If that letter or number is already at it's highest possible value, it starts over at the lowers value and increments the next letter or number to the left. Some examples:




increments to




increments to




increments to




increments to



WARNING!   A numbering scheme that attempts to use meaningful information in the patient ID is likely to have problems sometime in the future. If the ID is based on the patient's last name, it will be a problem if the patient's last name changes. If it based on a program in which they are participating, that too can change. You will be best served by letting Aeris assign IDs consecutively.