I also found a quote about it!
"If you lost your hair due to medical reasons such as chemotherapy, alopecia, or other medical conditions, when requesting a prescription from your physician, the full lace wig should then be referred to as a "full cranial prosthesis" which will then enable it to be covered under most medical insurance policies.
Most insurance companies will cover between 60-100% cost for your full cranial prosthesis. However, if you request coverage for a wig, chances are your claim will be denied."
For more info,go to
http://www.fulllacewigsbyhotti...n.com/page/250300217