I have been diagnosed with four different types of diabetes at different times, and still no one can agree. Whenever I see a new consultant I 'challenge' them to diagnose me. Most aren't sure. I believe I have MODY due to a strong family history (mother, brother), getting it as a teen but it came on slowly not fast so unlikely to be T1. I was on meds for 8 years before being put on to insulin, my pancreatic function is low so I'm not producing much of my own insulin and until I put on a lot of weight in two pregnancies, was not particularly insulin resistant but after I was (double diabetes?)
However despite being seen in the MODY clinic at one hospital, when I moved areas the new hospital said I was t2 and the gp said I was t1 (fine by me means I get my test strips without begging for them). Another doctor thought I had LADA but I don't think that is correct.
I believe there are many different types of diabetes, and the doctors are only just realising this. My understanding of MODY is that my pancreas could function, but the gene that sends the message to the pancreas to produce insulin is faulty so the message does not get through. I could be wrong, i'm not a doctor and I'm not even sure the doctors know how it all works.