3 Years & 6 Months later - Surprise bill

After 3 years and 6 months, I receive a statement per email today for x-rays at a facility I don't believe i've been admitted to - except that I did visit patients there. This is bizarre. Now really, am i expected to pay for something I have no record of? and so many years later? Does the left hand even know what the right hand is **** at this practice? I suggest you wait until Covid-19 is behind us perhaps we can work together then to track and trace who didn't do their job properly.