Hello JMD, welcome to Diabetes Forum! Tell us about this number. Is that a fasting blood sugar taken at home before breakfast? Is it a number from a blood test done at a lab and sent to your doctor? It is difficult to say anything about the number unless we know the circumstances. Do you have any diabetes symptoms? Drinking more liquid that usual? Peeing more than usual? Losing weight? Losing your appetite? Tell us more about yourself. Good luck to you.
My wife went high a few times, when she wasn't feeling well, in the 181 range. After she felt better, right back down to normal. I remember testing her after a high carb meal with a nice dessert, and she was only 95 then.
If you are worried, ask for a glucose tolerance test. That would be much more informative than one reading.
That and everything Richard mentioned. More details.