With electronic communication today there are many ways authorities can track down numbers of relatives. As others have mentioned, if either 1) the man was connected to the hospital before, numbers stay on file, or, 2) if the hospital has electronic communication with regular doctor’s offices, that information can be pulled up, too. Police also have their own ways to look things up.
But this is a really good reminder to update your emergency contacts regularly, especially if any of them become incapacitated themselves or pass away.
We had a situation in the hospital not too long ago where someone was found down at home and only by chance discovered, was very ill and confused. Turned out his health care proxy had passed away months earlier, and he was deemed unable to appoint another due to his mental capacity, so at that point a legal guardian has to be appointed by the courts and that takes a long time. Meanwhile, unless things improve the person can linger in the hospital for a long time. In this particular case the patient improved somewhat and wanted to leave but couldn’t. The health care proxy could’ve helped make decisions and the patient could’ve moved on had there been one in place.
Another situation we saw recently was a relatively young person with no health care proxy in place. Same thing, mentally incapacitated and unable to appoint someone, and multiple family members infighting about who could visit, who information could be given to, decision making, etc. Clearly there was one person he was closest to but without legal documentation or improved cognition, it didn’t matter.
If you go into the hospital and they give you the form, fill it out. It will stay on file electronically, so if there are changes, have them updated. And be sure that the person you appoint not only knows your wishes, but has the courage to see them through if it comes to that. Sometimes people know what someone wants, but can’t go through with it. It’s not an easy job so choose accordingly.