The US Senate Committee on Health, Education, Labor and Pensions held a hearing on 6/10/2015. The topic was Health Information Exchange: A Path Towards Improving the Quality and Value of Health Care for Patients. This press release from CHIME reports on the need for accurate patient identification. CHIME press release 6/10/2015.
You can see the video here. The testimony relating to a healthcare identifier is between 1 hour 15 minutes and 1 hour 25 minutes.