HI, Welcome to HCM, I am Dr. Das
First of all,the random blood glucose
, though it is high but for stumping a patient as havinng DM2, you have to do minimum 2 random plasma glucose level of more than 200 mg/dl.
For DI you have to do plasma Na,K, and urinary Na,K.
NOw, urine, it is acidic. It contains glucose. So, there is high chance of urinary tract infection
which is most common in patient with DM.
My suggestion is do a fasting and PP sugar level and then go for the tests for DI. It will clear the picture.