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.
Health Insurance Coverage for Hearing Aids. There are various options available to assist in funding for hearing aids and associated services: Some private health care plans cover the costs of audiologic tests, a hearing aid evaluation, and even partial or full coverage of a hearing aid.Be sure to check with your health insurance company or your employer's benefits manager to find out.ome private health care plans cover the costs of audiologic tests, a hearing aid evaluation, and even partial or full coverage of a hearing aid. Be sure to check with your health insurance company or your employer's benefits manager to find out.