Thank you for your question Lisa.
The normal blood glucose level is 3.5-7.5mmol. The 6am BGLs are within normal limits, however the level of 14.9 is outside the normal range. There may be a number of reasons why it may be higher than usual such as strips being out of date, his hands not being clean when doing the test or a meter that is not reading accurately.
You don't say if your son is showing any signs or symptoms of diabetes. These would include thirst, excessive urination, tirdeness or loss of weight. With type 1 diabetes, these symptoms can develop quite quickly and urgent medical treatment is required.
If your son is overweight or you have a strong family history of type 2 diabetes, and the high readings are correct, then you should consult a doctor for a formal blood glucose test.
You can check the accuracy of your meter by doing a control solution test - this can be done at the Australian Diabetes Council retail outlets or you can purchase the control solution to do this yourself.
If you are still concerned you can phone one of our Diabetes Educators on 1300 342 238.