Diabetes & metabolic health · 4 min read · Evidence-informed guide
Prediabetes Ranges: What Do They Mean?
Prediabetes describes glucose or A1C values above the usual range but below diabetes criteria. The ADA lists an A1C of 5.7% to 6.4% as one prediabetes range in nonpregnant adults; a clinician considers the test method, your health history, and whether repeat testing is needed.
Key answer
The short version
Prediabetes describes glucose or A1C values above the usual range but below diabetes criteria. The ADA lists an A1C of 5.7% to 6.4% as one prediabetes range in nonpregnant adults; a clinician considers the test method, your health history, and whether repeat testing is needed.
More than one test can be used
A1C, fasting plasma glucose, and a two-hour oral glucose tolerance test can each be used to identify prediabetes or diabetes. The tests measure related but different aspects of glucose regulation.
Why follow-up is personal
Risk, testing intervals, and next steps depend on factors such as prior results, symptoms, weight, medicines, family history, pregnancy history, and other health conditions. Do not self-diagnose from a home device or one internet chart.
Questions for your visit
Ask which test was used, whether it needs repeating, what your individual risk factors are, and what monitoring or prevention plan is appropriate.
Clinical perspective
How to think about this
Prediabetes is a risk state, not a verdict. It identifies an opportunity to understand metabolic risk early and to choose prevention strategies that are durable enough to matter over years, not merely days.
Questions worth bringing to a visit
- Which test established this result, and should it be repeated?
- What factors most affect my personal risk?
- What follow-up interval is appropriate for me?
Continue exploring
Related patient questions
Sources
1. ADA, Diagnosis and Classification of Diabetes—2026
Diagnostic and prediabetes criteria.
Overview of diabetes and prediabetes tests.