leaching. Phosphate leached from guano phosphatizes the underlying rocks in some areas, forming apatite where the host rock is limestone and forming aluminum- or aluminum-iron-phosphate minerals where the underlying rock is a silicate. Individual deposits of both igneous apatite and marine phosÂ­
Medicare Part B (Medical Insurance) covers diagnostic hearing and balance exams if your doctor or other health care provider orders these tests to see if you need medical treatment. Medicare doesn't cover routine hearing exams, hearing aids, or exams for fitting hearing aids.
As for Humana covering a hearing aid, or hearing aids, it will depend on the coverage that you have, or he has. Humana Gold Plus Integrated does cover hearing aids, at least in my state, but there are conditions.First, they will only cover hearing aids every three years.Second, they only pay $1000 toward the hearing aids. This means that if you need one, they will pay $1000 toward it.If you need two, you still only get the $1000 toward them.econd, they only pay $1000 toward the hearing aids. This means that if you need one, they will pay $1000 toward it. If you need two, you still only get the $1000 toward them.