Depending on how it looks, may influence their decision. I, myself am in the process of applying for coverage as well. My daughter's H is very large and on her forehead.
Anyways, I included the "CARES ACT" as well as "Children with Deformities" act. They are not officially passed, but they are acts that have been introduced and being evaluated (Correct me if I'm wrong).
Try and be persistent, that's what I'm doing. But, argue that perhaps it is to restore a normal appearance.
Insurance companies are brutal at times, it's heartbreaking. I wish you the best of luck and keep us updated!