I am not the OP, but I have gone through actual neuropsychological testing with a specialist to be diagnosed with ADHD. It did come with a several week waiting period as the results were reviewed and considered against my thorough consultation interview, also completed by the physician.
I've had a career in hospital IT and operations. The challenge is finding a replacement that is as reliable and accessible as a pager. The replacement communications products out there have some nice features (managing on-call scheduling, interfacing with electronic health records, etc), but it only takes a handful of outages to get everyone to switch back to pagers "just in case."