There is nothing stopping them from changing the reporting code to reflect ME but changing nothing else.
At present, with the biopsychosocial classification of CFS, disability insurance companies will refuse to provide lifelong disability support, because insurance regulations stipulate that psychological conditions do not get long term support.
If we could go back to the ME name and ME neurological classification, these disability insurance companies would suddenly have to start paying billions for ME patient disability support.
Once that happens, I think these companies might start putting pressure on governments to increase research into ME treatments, simply because ME would be costing the insurance companies a fortune every year.
The trouble with ME/CFS is that it often seems to be the parents, wives or husbands of the patients who financially support them over the decades, so the true cost of this illness becomes invisible to governments and society.
If disability insurance companies suddenly were forced to pay out billions in income support to ME/CFS patients, that would be a very good thing, not only because it is fair to the patients and their families, but also, the financial pain of ME/CFS would become all to apparent to wider society, and that would hopefully spur on more research into treatments.