Billing Office Visits with Injections

I need help location the following verbage:

'If you are billing for an injection in the same body part, for the same diagnosis, within a 3 year time frame, correct coding says you are not entitled to bill the E & M.'

I have search CMS to no avail. My main concern is the '3 year time frame', has anyone seen this before and if so where?

Thank you for your time,

Terri

Billing Office Visits with Injections