How bad is A1C value 10?

For people without diabetes, the normal range for the hemoglobin A1c level is between 4% and 5.6%. Hemoglobin A1c levels between 5.7% and 6.4% mean you have prediabetes and a higher chance of getting diabetes. Levels of 6.5% or higher mean you have diabetes. A level 10 means your diabetes has shot up to alarming levels. Consult with your diabetologist at the earliest to avoid side effects such as foot amputation and blindness.