Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
Some CGMs are now sold over the counter. Your provider sets your personal targets.
Why it's done
- Diabetes treated with insulin or medicines that can cause lows
- Adjusting treatment
- Checking symptoms of high or low sugar
Getting ready and what happens
- Wash and dry your hands before a fingerstick.
How the test is done
- Fingerstick: prick the side of a fingertip and touch the drop to a test strip.
- CGM: a small sensor under the skin reads glucose every few minutes.
What the results mean
| Result | Typical range for adults |
|---|---|
| Common targets before meals | 80 to 130 mg/dL |
| 1 to 2 hours after eating | Below 180 mg/dL |
| CGM time in range | 70 to 180 mg/dL at least 70% of the time |
| Low | Below 70 mg/dL; below 54 is serious |
Normal ranges vary from lab to lab and can differ by age, sex, and pregnancy. Your report lists your lab's own range next to each result. A result a little outside the range is often not a problem.
Lows
Treat with 15 grams of fast sugar, recheck in 15 minutes, and repeat if still low.
When a result needs quick action
Call 911A low with confusion, seizure, or passing out (use glucagon if available)
Call your provider todayReadings over 300 mg/dL, or ketones with high readings
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
Risks
A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.
Related conditions
Related medicines
Related tests
Sources
Last updated 2026-11-13.