"Is the viral DNA test specific for each hep type?"
Yes. For Hep B it's a viral DNA test.....for Hepatitis C, it's a viral RNA test.
The test for Hepatitis A does not give you a viral load result. The result will either be positive (or reactive)...or negative.
A positive test means that at some point in your life you had Hepatitis A and are now immune to it. Hep A goes away on its own and once you've had it one time you can never catch it again.
A negative Hep A test means you've never had Hep A and you need the vaccine.
"My concern is that the current high level of DNA for my hep B is not necessary due to my hep B but maybe hep A or D?"
No, that can't be. A Hep B DNA result pertains only to Hep B.
the tests r specific for each virus. usually they do only hepb and hepc bcoz they r spread by blood. But if someone is positive for either , he should protect himself from hepa ,hepe...spread by water or food.Bcoz it puts extra burden on liver.
Do you have Hep A or D? If not, why worry about DNA?