We regularly adjust our clinical, payment and coding policy positions as part of our ongoing policy review processes. In developing our policies, we may consult with external professional organizations, medical societies and the independent Physician Advisory Board, which provides advice to us on issues of importance to physicians. The accompanying chart outlines coding and policy changes.

Follow link to source for details. http://www.aetna.com/newsletters/provider/OfficeLinks/2012/March/clinical-coding-changes.html