It was fully covered by the NHS. Neanderthal Health Service. Neanderthals were socialists, but they ran out of other clan’s money. Hence they lost out to Cro-Magnons, who were capitalists. Unfortunately due to interbreeding some Neanderthal DNA survived in modern humans. Today those with excess Neanderthal DNA are known as Democrats.
As good an explanation as any. Poor guy, though, if it was covered by the NHS he would have had to wait for years in excruciating pain.