Devices › Alternate controller enabled insulin infusion pump
Device brand name · Alternate controller enabled infusion pump
t:slim X2 Insulin Pump with Control-IQ Technology: medical device reports filed with FDA
584,236 reports name it, 2020–2026. Manufacturer given most often on reports: Tandem Diabetes Care. Product code QFG.
- 584,236
- device reports naming the brand
- 2.2% of all MAUDE reports · about 100,278 a year
- 129,119
- reports, 12 months to August 2026
- 41,807 in the 12 months before
- 90.6%
- classified as malfunction
- 88.9% across the product code
- 0%
- classified as death, as reported
- 93 reports · not verified by FDA
FDA's MAUDE database holds 584,236 reports that name the brand "t:slim X2 Insulin Pump with Control-IQ Technology" (alternate controller enabled infusion pump), received between September 2020 and August 2026; the manufacturer given most often on reports is Tandem Diabetes Care. Spellings of one product vary from report to report.
129,119 reports arrived in the 12 months to August 2026, up 209% from 41,807 in the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are malfunction (90.6%) and injury (9.4%); across all alternate controller enabled insulin infusion pump reports (product code QFG) death is recorded in 0% and malfunction in 88.9%. Event type is the reporter's classification of the report, not a verified outcome.
The device problems coded most often are pumping stopped (31.2%), incorrect measurement (9.7%) and charging problem (8.9%). The patient problems coded most often are hyperglycemia, hypoglycemia and elevated ketones/ diabetic ketoacidosis. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."
Reports by month, five years
Reports by the month FDA received them. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.
By year received
Event type and report source
Event type, as classified on the report
Who filed the report
Grey bar: all 1,297,995 reports carrying product code QFG. Event type is the filer's classification and is not verified by FDA.
Device problems coded
| Device problem (FDA code) | Reports | Share | Share across product code |
|---|---|---|---|
| Pumping stopped | 182,123 | 31.2% | 27.1% |
| Incorrect measurementthe device measured wrongly | 56,870 | 9.7% | 6.8% |
| Charging problem | 51,766 | 8.9% | 7.4% |
| Communication or transmission problemthe device could not communicate or transmit | 41,144 | 7% | 4.7% |
| Obstruction of flow | 36,250 | 6.2% | 6.4% |
| Failure to sense | 28,625 | 4.9% | 3.3% |
| Battery problema problem with the battery | 26,666 | 4.6% | 5.3% |
| Filling problem | 21,107 | 3.6% | 2.4% |
| False alarm | 20,629 | 3.5% | 2.4% |
| Mechanical problema mechanical problem | 20,568 | 3.5% | 2.8% |
| Crackthe device cracked | 19,080 | 3.3% | 2% |
| Poor quality image | 14,014 | 2.4% | 1.5% |
| Failure to charge | 13,690 | 2.3% | 1.9% |
| Device sensing problem | 12,337 | 2.1% | 1.6% |
| Date/time-related software problem | 10,166 | 1.7% | 1.3% |
| Inappropriate or unexpected reset | 7,401 | 1.3% | 0.9% |
| Key or button unresponsive/not working | 7,105 | 1.2% | 1.4% |
| Physical resistance/sticking | 6,988 | 1.2% | 0.6% |
| Data problem | 6,657 | 1.1% | 0.7% |
| Detachment of device or device componentpart of the device came off | 6,279 | 1.1% | 1% |
FDA's device problem codes as entered on the report; one report can carry several. Generic codes such as "no apparent adverse event" are left out.
Patient problems coded
| Patient problem (FDA code) | Reports | Share |
|---|---|---|
| Hyperglycemiahigh blood sugar | 34,653 | 5.9% |
| Hypoglycemialow blood sugar | 18,595 | 3.2% |
| Elevated ketones/ diabetic ketoacidosis | 3,716 | 0.6% |
| Loss of consciousnesspassing out | 772 | 0.1% |
| Falla fall | 414 | 0.1% |
| Vomitingbeing sick | 378 | 0.1% |
| Convulsion/seizure | 279 | 0% |
| Nauseafeeling sick | 214 | 0% |
| Bruise/contusion | 193 | 0% |
| Confusion/ disorientation | 176 | 0% |
| Dizzinesslight-headedness or unsteadiness | 86 | 0% |
| Headachehead pain | 81 | 0% |
| Bone fracture(s) | 74 | 0% |
| Coma | 69 | 0% |
| Fatiguetiredness | 68 | 0% |
Patient problem codes are present mainly in reports filed since 2019 and are often blank.
In context
| Measure | t:slim X2 Insulin Pump with Control-IQ Technology | Product code QFG | All MAUDE reports |
|---|---|---|---|
| Reports | 584,236 | 1,297,995 | 26,136,888 |
| Share of that pool | — | 45% | 2.2% |
| Classified as death, per 1,000 reports | 0 | 0 | 9 |
| Classified as injury | 9.4% | 11.1% | 36.2% |
| Classified as malfunction | 90.6% | 88.9% | 62.3% |
| Filed by the manufacturer | 100% | 99.9% | 94.9% |
Shares are of reports, not of devices in use. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."
Other brands with product code QFG
| Brand | Reports | Latest 12 months | Classified as death |
|---|---|---|---|
| t:slim X2 Insulin Pump with Interoperable Technology (with t:connect mobile app) | 267,716 | 11,502 | 0% |
| Omnipod 5 Pod | 72,516 | 13,913 | 0.1% |
| t:slim X2 Insulin Pump with Control-IQ+ Technology | 65,298 | 57,936 | 0% |
| iLet Bionic Pancreas | 62,887 | 60,771 | 0.1% |
| Omnipod 5 Pods | 53,253 | 34,593 | 0% |
| Omnipod 5 Automated Insulin Delivery System | 50,523 | 32,478 | 0% |
| t:slim X2 Insulin Pump with Interoperable Technology | 37,136 | 865 | 0% |
| Tandem Mobi Insulin Pump with Control-IQ+ Technology | 36,506 | 31,674 | 0% |
| Tandem Mobi Insulin Pump with Interoperable Technology | 27,952 | 1,595 | 0% |
| Tandem Mobi Insulin Pump with Control-IQ Technology | 15,154 | 9,553 | 0% |
| MiniMed 780G US System BLE Connect 3.0 mg/dL | 112,817 | 57,140 | 0.1% |
| t:slim X2 Insulin Pump with Basal-IQ Technology | 142,641 | 1,916 | 0% |
| Omnipod 5 Controller | 2,618 | 926 | 0.8% |
| T Slim X2 Insulin Pump With Interoperable Technology With T Connect Mobile A | 2,555 | 0 | 0% |
| PUMP MMT-1884L MM780G BLE 3.0 mg/ml | 34,846 | 9,703 | 0.1% |
Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA also states that "common products may have a higher number of adverse events due to the higher total number of people using the product."
Questions about t:slim X2 Insulin Pump with Control-IQ Technology reports
How many FDA reports name t:slim X2 Insulin Pump with Control-IQ Technology?
584,236 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 129,119 in the latest 12 months.
What kinds of events are reported?
malfunction (90.6%) and injury (9.4%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.
What device problems are coded?
pumping stopped (31.2%), incorrect measurement (9.7%), charging problem (8.9%), communication or transmission problem (7%) and obstruction of flow (6.2%). These are FDA's device problem codes as entered on the report.
Who files these reports?
manufacturer reports (100%) and voluntary reports (0%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.
Do these reports show that t:slim X2 Insulin Pump with Control-IQ Technology was at fault?
No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA adds that "a causal relationship cannot be established between product and reactions listed in a report."
How do I report a problem with a medical device?
Through FDA MedWatch (Form FDA 3500 for health professionals and consumers), or to the manufacturer. See the guide on how to report.
Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. A report counts here when any device it lists carries this brand name after punctuation and capitalisation are normalised. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.
Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.