My Detailed Review of the MiniMed 670G from Medtronic

The MiniMed 670G from Medtronic is an insulin pump coupled with a glucose sensor.  It uses a computer program (called an “algorithm”) to automate certain aspects of insulin delivery.  I decided to try 670G partially out of professional interest (everybody and their great aunt has been asking for my opinion on the system), and partially out of personal interest, as my blood glucose control hasn’t been the greatest the past couple of years.

Let me start out by saying this:

Since I started using 670G, my overall blood glucose control is better.

I have to keep reminding myself of this non-consequential fact, because every day I find things about this system that I don’t particularly like.

To continue reading, click here.

44 Comments
  1. Avatar

    I like the idea behind the unit but don’t like what it actually does. I’m ending up taking more finger pricks and adjustments than what i use to with my animus/dexcom system. The alerts and working thru the menus is driving me crazy. I want a system that stops delivering insulin when you are 70 period. After 58 years of this that’s all i want. The lawyers screwed this on up.

  2. Avatar

    I went from dexcom g5 and pens to the 670g. I love the way the auto adjustments work. Problem is when the cgm is t working correctly which seems to be a lot. It’s almost always off by at least 20. End up checking my blood sugar at least 5 times a day. I have had quite a few sensors that failed. Very disappointed. My dexcom was almost always with in 5-10. Almost never needed re-calibration and was just easier to use. I think I just want to send this back and get the tslim and dexcom combo.

    • Avatar

      IM there with you bud, used it for 2 weeks.. found it to be inaccurate, labor intensive, expensive, .what good is the loop system if it’s off by 40 pts .. most of the time

      • Avatar

        I put up with the 670g sensor for a year and just could not handle ALL the issues that kept me up many nights/weekends/days. I have been on the Dexcom G6 for 2 weeks. What a relief. I am only doing finger sticks to see how close I really am. I am never more than -+10 either way. And comfortable now that I go days before a finger stick and not truly needed. With the 670G it kept telling me I was under 40 and tested at 187 because I was trying to get the low up. STAY AWAY from the 670G sensor. It should NOT be on the market!! FDA really needs to investigate this device more!

        • Avatar

          I’m writing a paper for school on the new advances in type 1 diabetes including the mini Med 670 G. I was wondering if someone could help me with the costs of the minimed 670 G vs the continuous infusion pump. I mean how much both devices cost upfront and the supplies maintanence yearly for each. Also from out of pocket how much is covered by the insurance. Not that easy to get that information from medtronic.

          • Avatar

            Bought my 670G in Apr (approx). Cost was $9500 approx.Transmitter supplied for free but would need replacing after approx 12mths, Canula supplies approx
            $360pa, test strips $360 – $400pa (depending on how many tests being done),Sensors $125 per month (1/2 price deal)=$1750pa Transmitter ??
            If you read previous reviews I agree 100% with them. I am testing more over dosing which has created lows then rebounds, waking many times throughout the night, inaccurate readings, menus long and frustrating. Bottomline if I could get back my old broken pump I would. Faults and all it was better.

    • Avatar

      I absolutely agree

  3. Avatar

    In the first 4 months of using the 670G I called for support more times than I did in the 3 years of using Dexcom. It is not uncommon to have a difference of 100 points between the CGM and finger stick. I am now on month 10 and miserable I can’t wait to get rid of this piece of shit. “Customer service” treats you like an idiot when you call, keep you on the phone for at least 20 minutes before they agree you have a bad sensor. I am going to talk to my Dr. and see if I can get the Tandem pump and Dexcom. I totally hate the 670G

    • Avatar

      Amen. Almost a year with the MiniMed and I cannot take it any longer. Ordered the Dexcom G6 last week.

  4. Avatar

    I habe had three meditronic pumps and the sensor system is really bad. I was pretty excited about about getting the 670g. Boy was I disappointed. The sensors in this system is by far the worst pump yet. I have called meditronic at least a dozen times as I wanted this pump to work. The sensors are not transmitting or there not connecting. I recently called and the tech told me it was a bad transmitter and of course the new transmitter will not connect. At least the 530g worked some of the time. I am so disappointed with 570g. What a piece of crap? Don’t waste your time or money on this.i am so sorry that I bought this.

  5. Avatar

    Wow! I’m so glad I’ve been doing my research! (I’m a research nut!) My doctor highly recommended this pump. Said she her patients have been tremendously pleased and their numbers are much better.
    I’ve used the Medtronic pumps in the past along with the guardian sensor. I never had any luck. It almost turned me off of pumping while using a sensor completely. I’ve had diabetes for 43 years with NO complications at all. I’ve never even been to the hospital for anything related to diabetes, so I did not last more than a year on the sensor. Finger sticks are much more reliable. And my A1c proved it.
    Then I decided to give the CGM another try, but I used the Dexcom. When I tell you that my Dexcom is 95% accurate, I’m telling the truth. And when it isn’t, it is normally my error, not the sensor. I would love to see Medtronic allow the option of choosing which sensor you want to use. I know that would probably be an algorithm nightmare but a girl can dream, right?
    On top of that, as much as you pay for these pumps, then they don’t work? I’d be very upset to say the least because unless you pay out of pocket, you are stuck with it until the warranty is expired. I’m just thankful to find normal people doing reviews so someone considering the pump gets a real review rather than one that the company pays for. And of course there are people that the pump will work for, But in my pumping time, I’ve been through six pumps and I have not had good luck with Minimed at all. I love the T-slim that I use along with the Dexcom sensor. It’s my partner in crime. I rely on it constantly, sometimes too much, but it never gives me any grief. I got drawn in by the idea of a closed loop system and thought I’d give it another try.

    I’m glad I didn’t. Thank you!

    • Avatar

      I live with someone who is on the T-slim Control IQ trial, it may be worth considering. There are still issues, but is it WAAAY better than 670g. I can’t feel my fingers anymore I test so much on the 670g.

    • Avatar

      I gave the 670G a year and a half try, I am so feed up with the sensor problems, They are so far from accurate, and when the pump relies on accurate information to make the insulin adjustments, it ain’t happening right.I am tired of calling Medtronics for assistance, and yes, this would probably be a perfect pump if it was paired to a Dexcom, but Metronic will never allow that, heck, they wouldn’t be able to give their sensors away after that. I am awaken 1-6 times a night with alarms, I haven’t had a good night sleep in 1 1/2 years. Most disturbing is the inaccuracy of the glucose, I can be awaken and says your glucose is less then 40 when it is 162 mg/dl. Once it said my glucose was at 72 and I was about to pass out, and finger stick said 28. Company said it doesn’t shut off until you are less then 50. I’m trying to get the T-Slim only because it pairs with Dexcom, in the past this has been a very reliable sensor.

  6. Avatar

    This is the worst pump system ever, I have had it for around a month, had maybe one night of full sleep. If its not waking you 3 times to tell you it’s going in to suspend mode, it then goes and tells you that it’s resuming; which you must press 3 buttons each time it goes off. The same if the blood sugar goes high. It’s accuracy of it’s monitor is a joke. Simple is better Medtronics, This pump is a POS. The amount of time to connect to the sensor is pitiful. First you have to reset the transmitter, then pray it connects to the sensor. Animus pump is simple and far superior. Save yourself from having a stressful day everyday, don’t get the Minimed 670g pump. They are oversized; it gets caught on everything and rips out the belt clip; requires a minimums of 3 button press to deliver insulin, or 3 or more time to clear a message, which if you don’t hit it enough it goes off every 5 minutes. Again avoid the hassle pass on the Medtronics line of insulin pumps! As soon as the warranty period is over, I am going to try and find a better Pump system.

  7. Wow! If only I had waited. But I really couldn’t. Roche abandoned the US market and transferred all their ACCU-Chek customers over to Medtronic.

    https://www.healthline.com/diabetesmine/roche-hands-off-remaining-pump-customers-medtronic

    My endo suggested the Minimed 670G as a replacement for my ACCU-Chek and Dexcom G5. I started using the 670G in February 2018. I miss my Dexcom G5. The G5 was solid and getting my reading on my iPhone was fantastic. Repeated calls to Medtronic for when the 670G might have this feature leave me feeling like it will never happen.

    Downsides of the 670G:

    1. Too many finger sticks for calibration of new sensor. Sometimes the devices gets stuck in a loop. I have easily used 20 tests to calibrate a new sensor.
    2. Four hours is too time for sensor warm up.
    3. The pump/CGMS interface is the only way to operate the pump to accept test data and deliver insulin. Every time I need to eat I have to pull the tubing out from where it’s tucked in.
    4. Eating means testing, waiting for the meter to send data to pump, accepting the reading, unlocking the pump, selecting bolus, entering carbs, accepting bolus, selecting deliver.

    Upsides of the 670G:

    1) The algorithm is solid. A1C has improved.
    2) Changing insulin cartridge is easy (although it’s a lot of steps)
    3) Changing infusion set is easy

  8. Avatar

    This would have been my third pump, my first the Omnipod, and then I switched to Medtronic because I was dealing with too many occlusions and constant alarms. Being an ER nurse, this made this too cumbersome to deal with when dealing with critically ill patients. My last pump the 670G, I was really excited because its features were coming closer to having an almost natural like external pancreas. I received my pump, couldn’t schedule training for two weeks do to the reps schedule, and then started immediately. My first concern is that the infusion set were causing me a lot of pain to insert (EVERY time, usually some of the time in the past) and were becoming either occluded or dislodge very easily, causing small painful lumps (lipohypertrophy) under my skin. We changed infusion sets to the ones typically used on pregnant women and children (shorter needles and less painful to insert). After this I began to develop SEVERE skin reaction, I noticed blood under the adhesive (which I thought was coming from the site). When I went to change my site because it was too painful there was blood oozing from my injection site abut the adhesive was pulling my skin up too. a large patch of missing skin from where the adhesive was applied . It was so painful, I had to wear a non adhesive bandage so clothing would not rub it and had to take OTC pain medication because I now several lipohypertrophy sites along with patches of missing skin, I was in pain and felt like I was a walking petri dish waiting for an infection to start. Even as a health care professional I was SCARED. We know as diabetics we must be careful for any source of possible infection, especially skin. I contacted Medtronic and we tried different types of adhesives and they all did the same thing, pulled my skin up with removal. I tried using skin prep, alcohol over adhesive to loosen, even Vaseline and vitamin E oil to help loosen to remove but my skin was not liking this adhesive. While I have always had a slight reaction to bandaid adhesives, slightly reddened/itchy but goes away in a few hours, never has it pulled my skin off with it. Eager to still want to try an alternative because Medtronic staff were not medical professionals, I waited until my next appointment with my endocrinologist (unfortunately a little over two months -as we know specialists are very busy and difficult to schedule with) and went back to injections. He advised me based on his assessment and the pictures of the original wounds to stop using the devices (pump and CGM), the risks for infection were too grave. When I advised Medtronics, they told me that it was my not physicians decision to stop it, he ordered it and that they could give me more training. How is more training going to stop me from having a reaction to your adhesives. They would not take their machine back which has only been used for about 1 to 1.5 months as I stopped using it and went back to injections after t=about 4 weeks (mind you my sites were being changed more frequently because of lipohypertrophy and the pain) and they refused to allow me to return my unused supplies (the supplies were still in their original shipping box, unopened) nor the almost $10K+ pump and CGM (that my insurance company only paid a portion of). Their response is that they have a 30-day return policy. In their response to my BBB complaint, they imply their customers are important – how so when I told you my scenario, your 30 day return policy is ridiculous when you don’t train for 2 weeks and my issue was not mechanical but health related, and your only recommendation is to continue to offer me “additional training.” How is additional training going to eliminate the risk for infection? Shame on Medtronics. for being one of those BIG CORPORATE BULLIES. They are more concerned about their bottom line rather then the safety of the patients who use their equipment. I also tried to tell them that I cannot where an insulin pump without a physician to monitor and order the insulin. They still want me to accept more training. BE WARE OF BIG COMPANIES WHO DO NOT CARE ABOUT THEIR PATIENTS. As a nurse, I took an oath to do no maleficence (to cause no harm or destruction, especially by supernatural means). Perhaps Medtronics if they want to stay in the health care field should take the same oath! I only hope there are not others out there being coerced in this manner.

  9. Avatar

    We are having the same types of constant problems with the 670G pump. I would be really interested if anyone, including us, would like to pursue a class action lawsuit against them. You can contact me at+14026813766, Mike Lynch

    • Avatar

      Hi Mike. I have also had several of the same problems as others with the 670G. I got it in September 2017, and really wanted it to work well. But, as others experienced,it woke me {and my husband}up at least once every night, had problems with calibration, bad sensors, and I got a rash from the CGM adhesive. I gave up on the CGM, but continue to use the pump, which s OK. In reading others’ stories, I would support a class action lawsuit.

    • Avatar

      Waited for years for the closed loop. What a let down..

    • Mike, any traction with this?
      I am a Type 1 for 25 years and experienced pump and cgm user. Having the same issues but to an extreme degree that I am losing sensor and communication signal typicaly half of the day. 3 months of not being able to wear a sensor for morethan 3-4 days and the transmitter dying in that time because it is constantly trying to connect.
      I must have recorded calls that are more than 5 hours long. Week 3 i tried to return this entire thing and Ive been trying ever since. They continue to refuse to do anything other than replace the unit or transmitter, which has been done and the problem still continues.
      I’m more than ready to fight this immoral company.
      please let me know….
      Crystal 505-918-7648

      • Avatar

        Hi Everyone,
        We understand your frustration and challenges, but it would be best for someone to start their own blog, Facebook page or forum regarding further discussion of a lawsuit.

  10. Avatar

    Frankly it’s not medtronics fault if you have an allergy. You were allergic to plasters and didn’t think to trial the adhesives before hand? Seems a bit silly of you to me.

    Lawsuits?!……oh man.

    • Avatar

      Jamie, are you using the 670g? I am kinda thinking you are not. I heard there might be someone out there that was happy with the 670g, but I thought they were a unicorn…

  11. Avatar

    Hey Jamie lets not talk allergies buta piece ofmed.equip.that doesn’t perform as stated. After reading the reviews maybe it’s time foralaw suite before itkills somebody with all the inacuriesies. We’re in Mike

  12. Avatar

    very unhappy with Medtronic 670G…. not so much the pump, but the CGM is GOD Awful. I am in the process of switching it out to a Dexcom G6… I almost feel like my son would benefit more from injections/Dexcom rather than this. He started on it on 1/28 made several complaint calls already , I am waiting for them to say NO and I will flip my lid. Going to Endo this week, going to make a stink there as well and if all else fails, calling my insurance.

    • Avatar

      I want to weigh in and agree with the BAD reviews of the 670G CGM above! I will add a few additional items:
      1) the sensor has lasted 6 days only 3 times in the last 18 months. This makes the CGM 30% more expensive than advertised
      2) if the sensor gets blood on it from the insertion site it fails.
      3) calibrate between 6 and 8 times a day and follow the calibration with another requested finger prick.
      4)I am switching to the Dexcom G6 but can’t change to the T:Slim X2 pump until I switch from UHC to Medicare.apparently UHC has a contract with Medtronic and only covers out of network – very expensive.
      5) Bottom line is avoid the 670G CGM. I don’t know how it passed FDA trials!

  13. Avatar

    Seems to be a lot of Medtronics bashing going on here. I have had very little issues with all Medtronics pumps (and I’m on my 4th being 670g) and have found the Guardian 1, 2 and now 3 system relatively solid as far as CGMS goes. Furthermore the new closed loop development is absolutely amazing and a game changer. Good luck coming anywhere close to this level of sophistication with any other Pump.

    Ok there’s occasionally issues with bad sensors and more to the point, bad sites and Inperfect sensor insertions, however I have founds Medtronic to stand behind their product and support it for what it is, a great product.

    • Avatar

      I am very please w operation of 670 g but receiving supplies is terrible. I am on automatic ship and have run out of supplies every month. They are very good about replacing defective parts when you call them! My main problem now is that I am retiring and having to find an insurance co that will pay for the sensor because it is not approved by Medicare so supplement won’t pay for it. I have too much money invested to have to start over! Do any of you have a supplemental insurance that you could recommend.

  14. Avatar

    Very interesting reading all these comments-I am currently researching the 670g and the Tandem.

  15. Avatar

    My doc wants me to try a pump and cgm. I have been doing shots for 35 yrs. i am not thrilled with the thought of having it stuck in you all the time. I told him i would do my research and think about it. After being on several sites I have decided that this girl is staying with injections. Thanks for all of your reviews.

    • Avatar

      Glad they were helpful Patty!

    • Avatar

      I am having all of these same issues with the Medtronic CGM, but pumping is way better than injections and I think most would agree that they would never go back. Lots more freedom with a pump.

  16. Avatar

    Been a type 1 for nearly 25 years. Used minimed exclusively. Got the 670g. Worst pump I’ve ever had. Not only did the cgm create a horrible rash but the pump was VERY large and obtrusive. That was my breaking point. I wanted it to work so bad but sent it back and am sticking with my unwarranted paradigm 751 which is amazing compared to that. I hope they fix this issue. No ones wants a large pump…especially when the cgm doesn’t work and only creates a full body rash.

  17. Avatar

    Have worn a minimed pump for 26 years(except for a couple of years switch to an Animas pump per Dr. request) and wouldn’t want to go back to injections! Have had a fairly normal life on the insulin pump and have recommended them to many people.
    Can’t really recommend the CGM though, had the real time transmitter for my 530 and it drove me nuts. I discontinued its use and have been happy with the pump since.
    I haven’t seen any evidence that I’d want to try another CGM device though.

  18. Avatar

    I have on a 630g insulin pump. I went on this pump af animas went out of the pump market. The cgm part of this pump sucks. It was only a 6 day sensor only really going 5 days because the 6th day was inaccurate. Their supplies cost an arm and a leg. The directional arrows were only straight up or down. There was no slowly rising arrow. After being on the enlit sensors for a couple of months I went back on my dexcom. I am looking into the tslim in 21months when I will be eligible for a new pump.

  19. Avatar

    I had the Enlite sensors when I first decided to get a CGM. It was awful. It was always inaccurate, and the problem was in the beginning, I was just told to trust the machine. Well, half the time I was either pounding sugar when my glucose wasn’t low, or I was taking insulin when my glucose wasn’t high. I mean, I don’t understand why these developers don’t get that this is life or death for us. Numbers being off can mean the difference between waking up or not. The dexcom is the BEST CGM I have had so far. I have not little to no issues with it. Very user friendly. I need a new pump, but I am not getting this one.

  20. I have had the Medtronic 670g for almost 2 years, in that time my A1c has risen from 6.3 to 7.4. I find that teh CGM portion of teh Guardian system is an absolute failure, it frequently show my BG falling, when, in fact it is rising. Any attempt o adjust it by entering higher BG values ends up with the 670g no accept in the new values and then showing by BG continuing to fall. The inverse is also present, it may show my BG as high >200 when in fact my BG may be <120. The standard Medtronic response is to replace the sensor.

    The correct response should be we are giving you back your money and recalling this poorly executed equipment

  21. Avatar

    Why are endocrinologists still recommending the 670G? My son needs a new pump in August, we have always used Medtronic but based on the reviews I think we’ll go with the 630 and stay with Dexcom CGM.

  22. Avatar

    If anyone has very sensitive skin I found a tape called Grif Grips and I do not get itchy or get any red rashes with it and it works great for me.

  23. Avatar

    I have had the 670g for over a year now. It is a Big Fat Fail. I have had a pump for the last 15 years. This one is the worst. The CGM is inaccurate as everyone here has stated. It requires frequent calibrations so your not saving your fingers. 6 Day sensors last about 3 days on average. In the last month mine pump has started saying ” Sensor update in progress, this make take up to 3 hours. ” at day 3, usually in the middle of the night. For the next three hours it will beep and vibrate ever 15 minutes. At the end it says to change the sensor. This is a cumbersome system and not user friendly. When it works properly it is great, unfortunately it only works about 25% of the time. My A1C has also risen on this system. Currently looking for a system to replace it with.

  24. Avatar

    I am currently using the 670g and I actually enjoy using my pump, but I can totally relate to the some of the comments above, so I do understand the frustrations of using this pump and how it can turn someone away from pumping or this particular pumping system, but I also do enjoy how it has helped me take better control of my diabetes and has also helped me to bring my A1C levels down. I have learned how to work with this pump to get more accurate/closer Blood sugar with the Sensor Glucose readings. The only downside to this pump I am having right now is the fact that the meter only connects to 1 meter which is the Contour Next system, I have gone through two Healthcare insurance companies and both have made me get an authorization from my doctor to allow me to use these test strips (which was fine, because they honored the request), but recently my new Healthcare provider is now refusing to pay for these test strips and is asking me to switch to an Accu Check system due to it being a lower cost system. So now I kinda wish Medtronic would build a pump or update their 670g system with Bluetooth accessible Blood Glucose meter systems, where the customer is able to use any meter and it will be able to link to the pump oppose to now having to do everything manually. Also, I do hope they are building a better CGM system that will be more accurate where we will be able to use none to less finger pricks as well. 🙂 Be Blessed!

    • Avatar

      Thank you for your comment Deondra and for sharing what has been working for you, as well as thoughtful feedback on what could be improved. 🙂

Leave a Reply