PPACA & Data Collection on LGBTQ Health Disparities

ThinkProgress reports on the following aspect of PPACA: 

According to Section 4302 of the Affordable Care Act, the secretary of health and human services may collect any demographic data that she or he believes to be important for understanding and addressing health disparities. In June 2011 Secretary Sebelius announced a plan for including sexual orientation and gender identity in national data collection efforts starting in 2013, in addition to the law’s required categories of race, ethnicity, primary language, sex, and disability status.

I am supervising a paper on this process, and would greatly appreciate any information about the process for this inclusion (who was consulted, administrative processes, etc.), and the anticipated challenges for implementation.  The HHS website on the topic is good, but there is always room for more analysis. Please feel free to make a note in the comments, or email me directly.