idb
Perhaps you might provide some further guidance from MATS.
I've just looked through AIP with no real luck in finding anything relevant.
Personally I think the ATC really confused the issue.
From my limited knowledge, MED1 (or Air MED1 or whatever else you want to call it) is something annotated on your flight plan prior to the flight.
What she should have asked for (and what the captain should have done from the start) was delare a PAN due to a medical issue with the passenger.
I get completely sick of the Yanks not using ICAO procedures - it is happening more and more here as well.