Mary Ellen Phipps

Mary Ellen Phipps

Mary Ellen is the founder of Milk & Honey Nutrition and a Registered Dietitian Nutritionist (RDN)

Diabetes Insulin Pump 101 & Top Brands

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woman with insulin pump and deacon

There’s a lot to consider when choosing an insulin pump.

In this article we’ll cover what an insulin pump is, how they work, and the different brand options out there. I also have a helpful table at the end that compares the three most common brands. 

What is an insulin pump?

Insulin injections are necessary for people living with type 1 diabetes and people with type 2 diabetes whose pancreas’ don’t produce enough insulin. There are options for insulin delivery for these people including:

  • Injection by insulin syringes
  • Injection by insulin pens
  • Insulin pump. 
woman drawing up injection

The first two options, which most people think of, is an injection of insulin under the skin with syringes or pen needles. The next option is insulin injections using an insulin pump. You may be wondering what an insulin pump is, but don’t worry we will try to answer all of your questions below. We are going to go into a little bit of detail about the way pumps work and the different types of insulin pumps on the market.

***This article is not intended to provide medical advice, diagnosis, opinion, treatment or services. This article and the links contained in it provide general information for educational purposes only. The information provided in this article is not a substitute for medical care, and should not be used in place of the advice of your physician or registered dietitian.

How does an insulin pump work?

An insulin pump infuses insulin under the skin, to help manage glucose levels by using bolus injections (when you eat carbohydrate or to correct a high blood sugar)  and basal/continuous infusions every 3-5 minutes (to mimic the natural drip of insulin from a functioning pancreas. 

In type 1 diabetes the pancreas is no longer able to produce any insulin at all, so a basal injection or continuous drip is needed. Pumps infuse a basal dose of insulin every 3 to 5 minutes in an attempt to mimic pancreas activity in order to lower glucose in the blood stream. You can also program the insulin pump to inject a bolus dose (a larger dose) of insulin when necessary, like before eating or in times when blood sugar correction is necessary. 

woman managing diabetes in white kitchen

No single method or insulin regimen is a better option than the other. It is person-specific and one regimen might work better for you than others. Setting basal doses and bolus doses might change from day to day, and hour to hour and can be adjusted. Below we are going to talk about three different types of insulin pumps and how they compare to one another. The three pumps we are going to talk about are Tandem, Medtronic, and Omnipod. As always, speak to your doctor with any questions you may have.

Tandem insulin pump

The first pump we are going to discuss is the Tandem Diabetes Care insulin pump. There are several previous Tandem models, but the most recent one is the T-slim X2 Pump. This model is a slim touchscreen device with a rechargeable battery and a 300-unit cartridge. A tube from the device to the cannula on the stomach is used to deliver insulin into the body. 

The T-Slim has Control-IQ and Basal-IQ technology that works with the Dexcom G6 continuous glucose monitoring (CGM) system to help deliver insulin and prevent high and low glucose levels. This technology is a helpful tool used to successfully manage diabetes, but glucose levels should still be carefully monitored. The sleek touch screen makes it easy to observe the amount of insulin delivered and glucose history. This information can also be uploaded to the t-connect app to create reports to help understand glucose levels and insulin deliveries.

Medtronic insulin pump

The Medtronic system we will discuss is the Minimed 670 G system. This system is for type 1 diabetes only, but there is a Minimed 630G system for type 1 and type 2 diabetes. 

Like the Tandem model previously discussed, the Minimed also has tubing and a 300 unit reservoir. This tubing goes from the insulin pump to the insertion site on the abdomen and is changed every 2 to 3 days. Like the Tandem, Minimed has a continuous glucose sensor called the Guardian Sensor 3. This sensor is attached to the abdomen or the back of the upper arm and tests the blood glucose levels every 5 minutes. The blood glucose level is then sent wirelessly to the pump which will adjust background/basal insulin (that continuous drip I mentioned above)  according to the glucose level. This Smartguard technology will help prevent highs and lows of blood sugar. 

For meals, glucose levels should be checked before meals and entered into the pump. Then enter the amount of carbs in the meal and the pump will give a recommended amount of insulin for a bolus injection of insulin. 

Again, this technology is helpful for controlling diabetes and glucose levels, but self-monitoring is also necessary. This can be achieved with the same guardian sensor. The monitoring from the sensor can be sent right to your smartphone for easy monitoring. 

Omnipod insulin pump

woman applying omnipod insulin pump

The last pump we will be discussing is the Omnipod Dash. The Omnipod is the only pod injection system we will be discussing. This is a tubeless system with a pod holding 200 units of insulin. The small waterproof pod is placed on the abdomen or back of the arm and is controlled by a separate Personal Diabetes Manager (PDM) that looks like a typical smart phone. 

First, you have to fill a pod with insulin and attach it to the arm or abdomen. Filling the pod is much like filling the reservoirs from the previous two pumps discussed. In the simplest description, using a needle and syringe, insulin is drawn out of the vial and injected into the pod. The pod will last for 3 days (72 hours of insulin delivery) before needing to be changed out for a new pod. 

You will program your basal rate in the PDM for a continuous infusion of insulin. The PDM is only compatible with the Contour Next One blood glucose meter. This is not a continuous meter, but rather a finger prick and strip test. Although this is the only compatible meter that will allow wireless transfer of data to the PDM, you can choose an alternative glucose meter. Using another meter would just mean you would have to manually enter glucose readings into the PDM. Just like the other pumps you are able to enter the information about meals and carbohydrates to begin a bolus injection of insulin. There is also a CalorieKing Database included on the PDM that has the carbohydrate count for many foods that will help adjust the bolus injection. 

Each system has different benefits for people who have diabetes and making a choice is dependent on the system that is best for you. Hopefully, the discussion of each system will help the decision-making process. Below you will also see a table going over some other specifics of each system.

Insulin pump cost and overview


Tandem/T-SlimMedtronic/Minimed 670G System Omnipod/Dash
Waterproof*YesYesYes
BatteryRechargeable1 AARechargeable
Out of Pocket Cost**~$7500~$7800~$800 (pod prices increase cost)
Insurance coverageCovered under most insurances Covered under most insurancesCovered under most insurances 
TubingYesYesNo
Units300-unit reservoir300-unit reservoir200-unit pod
Bolus Range0.05 to 25 units0.025 to 25 units 0.05 to 30 units
Basal Range0.1 to 15 units/hr 0.001 unit increments0.025 to 35 units/hr 0.025 unit increments0 to 30 units/hr 0.05 unit increments
Monitoring technology Yes with DexcomYes with Medtronic Guardian Sensor 3Yes with Contour Next One
Age Range 14 years or greater7 years or greater2 years or greater
*waterproof up to a certain depth and time in water
**Many will allow a payment plan for out of pocket cost

Insulin pump supplies

alcohol wipes, insulin, and onipod pod insulin pump supplies

The initial cost of an insulin pump can be quite large as seen above, but it’s also important to factor the monthly supply cost for infusion sets, cartridges and/or pods. Months supply costs can range from $300-$600 cash price. (This will change based on your level of insurance coverage.

There’s also numerous ways to personalize your pump through fun adhesion tapes, cook covers/protectors, and carrying cases. A simple google search for “fun insulin pump accessories” will bring up a whole host of websites offering some great options!

Insulin pump accessories

There’s also numerous ways to personalize your pump through fun adhesion tapes, cook covers/protectors, and carrying cases. A simple google search for “fun insulin pump accessories” will bring up a whole host of websites offering some great options!

More to explore...

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