Time in Range
Also known as: TIR
The percentage of time blood glucose stays between 70–180 mg/dL — a key CGM metric that captures glucose control better than A1C alone.
Time in Range (TIR) is a CGM-derived metric that measures what percentage of sensor glucose readings fall within the target range of 70–180 mg/dL. International consensus guidelines recommend a TIR target of at least 70% for most adults with Type 1 or Type 2 diabetes.
Unlike A1C, which only reflects the average, TIR reveals the full picture: how much time is spent too high (hyperglycemia), in range, or too low (hypoglycemia). Two patients can have the same A1C of 7% but wildly different TIR if one is consistently slightly elevated and the other has frequent dangerous lows averaging with highs.
Research links every 10% improvement in TIR to clinically meaningful reductions in A1C, estimated neuropathy risk, and retinopathy progression. TIR is increasingly used alongside A1C in clinical decision-making and is reported automatically by all major CGM platforms.
Frequently asked
What is Time in Range?
The percentage of time blood glucose stays between 70–180 mg/dL — a key CGM metric that captures glucose control better than A1C alone. Time in Range (TIR) is a CGM-derived metric that measures what percentage of sensor glucose readings fall within the target range of 70–180 mg/dL. International consensus guidelines recommend a TIR target of at least 70% for most adults with Type 1 or Type 2 diabetes.
How does Time in Range relate to Medicare coverage?
Medicare Part B covers most durable medical equipment related to Time in Range. Contact us to verify your specific coverage for related diabetic supplies.
Where can I get diabetic supplies related to Time in Range in Phoenix?
We deliver Medicare-covered diabetic supplies throughout the Phoenix metro area. Call us or complete the form above to verify your coverage.