Mark today on your calendar -- I actually disagree with Alessandro.
Some of my biggest customers are health care companies. And one of them has made a huge effort to get everything that is a 'form' into CMOD. So if you show up at an Emergency Room in a department, they ask you for your name and date of birth on almost every form. It's the same way police identify individuals, because it's extraordinarily close to being unique.
So, it only makes sense that you search for someone by their name, maybe their "health card" number, and the 'verification' information is their birthdate. It's also not outrageous to use the date field as a second criteria for common names like "Susan Smith" and "Michael Lee".
Now, being a consultant that has to deal with this transition, I totally wish it had been done a decade ago, before the problem was so much bigger, and so much more complex.
-JD.