Who are the top 6 health insurance plans in Indiana in terms of number of patients covered? I believe Anthem is number one?

Hi,
I suffer from toenail fungus, and I’ve tried ALL home remedies available without success. I’m also about to buy health insurance. I thought I would take this opportunity to finally visit the doctor and get rid of this problem. My questions are:
1. Which health insurance plans offer the best coverage to treat toenail fungus?
2. Do they cover the medication and the surgery required in some cases to remove the toenail?
Thank you for all your help!