Closed-Loop System
Also known as: Artificial Pancreas, Automated Insulin Delivery, AID
An insulin pump + CGM system that automatically adjusts insulin delivery in real time based on sensor glucose readings.
A closed-loop (automated insulin delivery) system combines a CGM, an insulin pump, and a control algorithm that automatically modulates basal insulin delivery — and in advanced systems, delivers automated correction boluses — based on real-time glucose readings. This mimics normal pancreatic function more closely than any previous therapy.
FDA-cleared closed-loop systems as of 2025 include: Tandem t:slim X2 with Control-IQ, Omnipod 5, Medtronic MiniMed 780G, and Beta Bionics iLet. Each uses a different algorithm with different aggressiveness, glucose targets, and integration requirements.
Studies show closed-loop systems improve Time in Range by 10–15 percentage points compared to sensor-augmented pump therapy alone, with significant reductions in both hypoglycemia and A1C. Medicare covers these systems under Part B with standard insulin pump documentation requirements.
Frequently asked
What is Closed-Loop System?
An insulin pump + CGM system that automatically adjusts insulin delivery in real time based on sensor glucose readings. A closed-loop (automated insulin delivery) system combines a CGM, an insulin pump, and a control algorithm that automatically modulates basal insulin delivery — and in advanced systems, delivers automated correction boluses — based on real-time glucose readings. This mimics normal pancreatic function more closely than any previous therapy.
How does Closed-Loop System relate to Medicare coverage?
Medicare Part B covers most durable medical equipment related to Closed-Loop System. Contact us to verify your specific coverage for related diabetic supplies.
Where can I get diabetic supplies related to Closed-Loop System in Phoenix?
We deliver Medicare-covered diabetic supplies throughout the Phoenix metro area. Call us or complete the form above to verify your coverage.