Coding for a three-phase bone scan

Q.

The hospital performed a bone scan that the technologist charged as CPT^® code 78306, however, I believe that it should be reported with code 78315 since vascular flow and blood pool were documented as well as whole-body bone scan images. Which code would be correct? 

A.

This would be considered a three-phase bone scan, 78315. The code and full description are as follows:

78315   Bone and/or joint imaging; 3 phase study