Health Concern are now a sub-group of the NHAP, but I believe there's only one or two NHAP candidates who aren't ICHC this time round.
As you can see from the map, they've consistently had a County Councillor or two in Worcs, and one in Salop since 2009. They also get a few decent second places every time. But they have been in a decline on the Borough level since the mid-2000s and only got one Borough Councillor elected in 2016.
I'm a bit bemused by a single-issue party like this standing on all levels, mainly because the various Healthcare Parties here only stand for county council as that's where most healthcare decisions are taken.