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Depending on the type of apparatus used, blood glucose
levels measured on a glucometer is a mechanical reading and needs to be confirmed by a blood test
at a reputed laboratory.
Considering the value was normal at your doctor’s office and it is a single high reading on the glucometer, it is not appropriate to comment whether or not you have diabetes
. I suggest you to repeat your blood sugars at a reputed laboratory and get glycosylated hemoglobin
after 3 months to know about your true diabetes status.
It is a good effort to track your blood sugars regularly especially when there is a family history of diabetes. Regular blood checks and good lifestyle will keep diabetes at bay.
Hope I have provided you with some useful information.
Wish you good health.