I agree with Thomas7331 below and add the 25 modifier to the E/M as this is a separately identifiable service, but would also like to add this.
In order for you to be able to get separate payment for your X-rays, and not to bundle them in with your E/M visit code, there are certain things that are required and that is to have a separate x-ray report. Now, whether you have it at the bottom of your office notes, or in a completely separate report, here is what is required.
1. The number and type of Views taken
2. The anatomic location that you are x-raying
3. A Diagnosis/reason for you taking the x-ray(s)
4. Your interpretation of the x-rays (final impression)
Don't forget, when you are billing for x-rays in the office, you are billing also for an "interpretation".
Both CPT rules and Medicare billing/payment rules address the need for a separate written report, and Medicare further states the report should mirror a report by a specialist in the field. See CMS Chapter 13 Radiology services Rev 20.1 and 100.1, and also the ACR with the requirements of documentation for interpreting reports. If you don't have this separate report, you cannot bill for the x-rays as they would be included in your E/M code.