Is HbA1c 6.6 diabetes?

When the A1C is 6.6, it may indicate that the current stage is not diabetes, but may show impaired glucose tolerance. Impaired glucose tolerance includes impaired fasting glucose and impaired glucose tolerance. Impaired fasting glucose refers to fasting blood sugar levels that are actually higher than normal blood sugar levels, but do not meet the criteria for being diagnosed as diabetes, while blood sugar levels two hours after meals, if higher than normal levels, but do not meet the criteria for being diagnosed as diabetes, are diagnosed as impaired glucose tolerance.