Unfortunately yes, you can have test results like what you have posted. I am inept at searching out the threads for you, but I have read here of tests that were that high.
How old is Mia? What is the forward plan your vet recommends?
Univ of Tennessee is the leading university
for liver diseases especially Liver Shunt and MVD.
The University of Tennessee College of Veterinary Medicine - Liver Shunt Research
I have attached a link which you may find beneficial as you learn more about those two liver diseases.