Does a complete blood workup include a full liver panel and what could potentially cause abnormal aminotransferase levels? ?

My husband had blood work done yesterday, and received his results today. A lot of stuff is out of whack, including elevated AST &ALT. He apparently has hypothyroidism, as well. The paperwork came back to him with instructions to make an appointment for an ultrasound of his thyroid.
Clearly we are going to discuss this with his doctor, but in the meanwhile I am going to panic. I have to assume the doctor saw the results, I don’t think anyone else could have ordered an ultrasound. Nothing was mentioned about the rest of the test results, which I thought might be unusual, so now I’m worried.

My husband does not drink or do drugs. However, he had back surgery last year and takes OTC and prescription pain medication as needed. He is relatively young, 30 y/o.

What could we potentially be facing here? I know the list can be long, and I am NOT looking for a diagnosis. I’d just like to know what the possibilities are until we are able to talk to his doctor. Hopefully tomorrow.