diagnosis code w/G code

Does it matter if a diagnosis code is attached when reporting the office visit and G code?

Diagnosis code with G codes for e-prescribing

No, from CMS

INSTRUCTIONS:
In order to report this measure, an e-prescribing system must have been adopted. This measure is to be reported for each patient visit during the reporting period that meets the denominator coding criteria. Denominator coding criteria for this measure include various ambulatory care settings. There is no specific diagnosis required for this measure. When reporting the measure, include both a denominator code and a numerator G-code on the claim.

I have updated the article on the topic with this information, and with the CMS specifications in the resource section. You can download it: it's a quick read.

http://www.codapedia.com/~article_148_.cfm