Guide · Diabetes
CGM vs. fingerstick testing: what's the difference?
Both tools measure glucose, but they answer slightly different questions. Here's how continuous glucose monitoring and fingerstick testing compare — and why many people end up using a bit of both.
Educational overview; coverage details verified against Medicare (CMS) sources.Educational information, not medical advice — talk with your physician about what's right for you.
How each one works
A fingerstick meter reads a drop of blood for an exact glucose value at that moment. A CGM reads glucose in the fluid between cells continuously, updating every few minutes through a worn sensor.
Snapshot vs. trend
A fingerstick tells you where you are right now. A CGM tells you where you are and where you're heading — the trend arrows show whether glucose is climbing or dropping, which helps you act before a high or low arrives.
Alerts and convenience
- A CGM can alert you to highs and lows, including while you sleep.
- It means far fewer finger pokes across the day.
- Readings and reports can be shared with your care team.
When fingersticks still matter
Fingersticks remain useful for confirming a CGM reading when symptoms don't match the number, and some systems ask for occasional calibration. The two are complements, not strict either/or.
How Medicare coverage works
Medicare covers therapeutic CGMs and their supplies for people who meet the criteria, and it separately covers blood glucose meters, test strips, and lancets. Coverage details are on our CGM and test-strip pages, and you can check your eligibility below.
We handle CGM and diabetes-testing supplies. Check what you're covered for.
Check your Medicare coverage in one step, or talk to an intake specialist — no cost or commitment to check.
Common questions
Can I have both a CGM and test strips covered?+
Coverage depends on medical necessity and your situation; many CGM users are also covered for a limited number of test strips. Our coverage pages walk through the specifics.
Have a question?
Three fields, real payer data, plain-English answer. Or talk to a person — we're fast.