Hi friend
Welcome to Health Care Magic
Generally doctors ask for basic blood tests, relevant to your condition (- to save your money).
If something abnormal is found, more tests are asked depending on the results.
You have not said anything except
Diabetes - so it is not possible to predict correctly.
There may be
Hypothyroidism - he might have done only T-4 first. T-3 and
TSH need to be done; some times more tests.. .
Fatty liver is common in diabetes - especially if not controlled well. That may be the reason to ask for
ultrasound.
It is not right to go on guessing more!
You should do the tests as requested / and follow up with your doctor...
Take care
Wishing you speedy recovery
God bless
Good luck