Capsule Endoscopy

I read a GI article written by Rhonda Buckholtz whereby she stated that as of 2012 the date of service for a capsule endoscopy had changed to the date of interpretation. Prior to that, we were instructed to use the "hook-up" date. I can't find anything from CMS stating the date of service should be the date of interpretation. Does anyone have any information about this that they would be willing to share?

Thank you.

Capsule Endoscopy