Insulin-to-Carb Ratio
Also known as: ICR, Carb Ratio, I:C Ratio
How many grams of carbohydrate one unit of rapid-acting insulin covers — used to calculate meal bolus doses.
The insulin-to-carb ratio (ICR) is a personalized setting that determines how much insulin is needed per gram of carbohydrate consumed. A ratio of 1:10 means 1 unit of rapid-acting insulin covers 10 grams of carbohydrate. A ratio of 1:15 means 1 unit covers 15 grams — indicating less insulin is needed per carb (more insulin-sensitive).
ICRs typically vary throughout the day — many people need more insulin per carb at breakfast due to cortisol's effect on insulin resistance. Insulin pumps allow storing different ICRs for different time periods.
Accurate ICRs are set through systematic testing: eating a meal with a known, measured carbohydrate content and observing the 2-hour post-meal glucose response. Dietitian guidance and endocrinologist input are essential for initial ICR settings.
Frequently asked
What is Insulin-to-Carb Ratio?
How many grams of carbohydrate one unit of rapid-acting insulin covers — used to calculate meal bolus doses. The insulin-to-carb ratio (ICR) is a personalized setting that determines how much insulin is needed per gram of carbohydrate consumed. A ratio of 1:10 means 1 unit of rapid-acting insulin covers 10 grams of carbohydrate. A ratio of 1:15 means 1 unit covers 15 grams — indicating less insulin is needed per carb (more insulin-sensitive).
How does Insulin-to-Carb Ratio relate to Medicare coverage?
Medicare Part B covers most durable medical equipment related to Insulin-to-Carb Ratio. Contact us to verify your specific coverage for related diabetic supplies.
Where can I get diabetic supplies related to Insulin-to-Carb Ratio in Phoenix?
We deliver Medicare-covered diabetic supplies throughout the Phoenix metro area. Call us or complete the form above to verify your coverage.