Hey David, I'm very new to this game but my understanding is doctor one was correct - 6.0 isn't prediabetic, 6.3 and above is, doctor two was incorrect, and practice nurse was correct - 6.8 for a diabetic is good, not good for someone who is prediabetic though. I also understand that a reading shouldn't be taken in isolation but rather as part of a picture. What is the HBA1C reading, how consistently are fasting readings high, what does a blood glucose result say etc. I personally wouldn't feel comfortable getting a diagnosis from one stand alone result, but as I say, I'm new to this... My HBA1C was 40, so below pre-diabetic but enough to scare me (particularly as I'm being investigated for PCOS which is linked to insulin resistance). My fasting blood glucose is consistently between 6.3 and 6.9 which would suggest pre-diabetes or impaired fasting glucose. So I'm going to speak with my doctor when I see him next to get his thoughts and possibly more tests. Most people with pre-diabetes may not get full blown diabetes but how much of that is due to lifestyle change early on? How many people with diabetes were prediabetic first? It's interesting stuff. I've not read anything to suggest that prediabeties or insulin resistance isn't a precursor to diabetes, and from what I've seen, a lot of people manage their prediabeties drug free through low carb or lifestyle change so I'm not sure it is financially motivated. But as I say, no expert here!