Insulin Pump

insulin pumps

There are a number of insulin pumps manufactured between 2006 – 2012 by Medtronic which are compatible. Compatibility has two requirements; (1) pump model and (2) firmware.

The Loop-compatible pumps are as follows:

HINT: The 515/715 and 522/722 pumps are all compatible. However, the 523/723 and 554/754 pumps will require you to check the firmware to see if the pump is Loop compatible. See the footnotes 3 and 4 for the required firmwares.

Insulin Pump
MM 515/715 MM 522/7222 MM 523/7233 MM 554/7544
CGM Dexcom G41
Dexcom G5
MM CGM


1. Offline access to glucose requires a Receiver with Share and the Share2 app to be running on the same iPhone as the Loop app is installed. Internet-dependent access via Share servers is also supported.
2. x22 model pumps were produced before firmware security patches were implemented, therefore these models are compatible because they will have firmware 2.4A or lower only. You can double check, but thus far all x22 pumps we have seen have compatible firmware.
3. Firmware 2.4A or lower is required for using Closed Loop and Bolus features.
4. Worldwide Veo (2.6A or lower) or Canadian/Australian Veo (2.7A or lower) is required for using Closed Loop and Bolus features. US version of this pump is not available.


If you want to triple check compatibility, you can check for presence/absence of "PC connect" in the pump. If PC Connect is present, then the pump is NOT compatible. You can find PC connect in the Medtronic's Main Menu, Utilities, Connect Devices. PC Connect, if present, will be the first option showing in that menu, above the word "Meters". If you do NOT see PC Connect there...good!


Pump Model

To determine your pump model, look at the back side of your pump. There should be a sticker on the underside of the pump. On the right hand side of the sticker, it says REF MMT-XXXXXX

Pump

    MMT       Pump Manufacturer Model (MiniMed Medtronic)
    722       Pump Model Number
    NA        Pump Region (NA=North America, CA=Canada/Australia, WW=Worldwide)
    S         Pump Color (S=Smoke, L=Clear/Lucite, B=Blue, P=Pink/Purple)

Some pumps may have an “L” or “S” or "R" before the pump region, e.g. a model number like MMT-722LNAS. This does not affect Loop compatibility.

Pump Differences

The differences between the pump models are limited.

500 vs 700: The difference between the Medtronic 500 series and the 700 series pumps is the size of the insulin reservoirs. The 500 series pumps use a 180 unit reservoir, and the 700 series pumps use a 300 unit reservoir (or smaller 180 unit reservoir, if you want).

x15/x22 vs x23/x54: The difference between the x15 and x22 pumps versus the x23 and x54 series pumps has only a few notable mentions:

Pump Model Basal increments Bolus increments Range
515/715
and
522/722
0.05
0.1
0.1
0.1
deliveries less than 10 units
greater than 10 units
523/723
and
554/754
0.025
0.05
0.1
0.025
0.05
0.1
between 0.025 to 0.975 units
between 1 to 9.95 units
greater than 10 units

Pump Firmware

If you are looking to use a 523/723 or 554/754 pump, you will need to check the firmware version for compatibility.

A pump’s firmware is the internal software that runs your pump. Older Medtronic firmware allows Loop to act as a “remote control” to set temp basals and report back pump data. Newer firmware disabled that “remote control” access and therefore cannot be used with these DIY closed-loop systems. There is currently no ability to downgrade a pump’s firmware or replace it with older firmware. Before you buy a used pump, make sure you are getting one with compatible firmware.

To find your pump’s firmware you will need to power it up. If the pump has not been powered on for some time (i.e., has been in storage without a battery for awhile), it will run through a start-up count and the firmware version will appear on the bottom right of the pump’s screen. Don’t turn away, as the version number will only be displayed for a little while before the screen moves onto other information displays.

If the pump has been active recently or has a reservoir installed, follow these steps:

  1. Press the ESC button on your pump.

  2. Scroll down with the Down Arrow button to the bottom of the status display.

  3. Read the bottom line of the display.

Firmware

Other pumps

While we all would love to have our {insert your favorite manufacturer} pump be compatible with a DIY closed-loop system like Loop, unfortunately it just isn't possible right now. There are efforts being made to crack the software code on other pumps (like Animas and Omnipod), and when they are successful...believe me...we will tell you about it!

Finding a Medtronic pump

Finding a compatible Medtronic pump is probably the most difficult part for most new Loopers. Our suggestion:

Medwow has been fairly frustrating for most people; poor response rate, high prices. The most success appears to come from either one-on-one discussions with fellow diabetics/doctors or using apps (Craigslist, NextDoor, LetGo, HelpAround). If you are using Craigslist, you may wish to use an app on your iPhone to make the searching easier. There are apps to search multiple cities at one for your keywords and set up alerts.

Craigslist

Safe Purchasing

If you choose to purchase from a remote or unknown seller, here are some tips for safe purchasing:

Red flags that may indicate a scam:

Pump Supplies

Medtronic will not typically want to sell pump supplies directly to customers who do not have an in-warranty Medtronic pump registered in their system. Ask your insurance about purchasing pump supplies through a durable medical equipment (DME) provider. If you are brand new to Medtronic infusion sites, you may want to ask for help from friends to try a variety of infusion sets before purchasing a full 90-day supply of any in particular.