Custom orthotics differ significantly from the orthotics you can purchase for about $30 from your local drug store. Drug store orthotics are generic and usually made for comfort whereas custom orthotics are made specifically for your foot to correct your individual issues. The quality and durability of custom made orthotics is also much higher so they will last much longer.
Custom orthotics also come with the assessment from your chiropractor who will address the specific issues you may be dealing with and they can explain the benefits that come from using custom orthotics. When you pick yourself out a pair from a drug store, you are left guessing which would have the most benefit to you.
Custom orthotics are covered by most health care providers. It is up to you to check with your health care provider to ensure that your individual plan includes custom orthotic coverage prior to having a pair made since every plan can differ. If your provider requires a physician's referral, your chiropractor is able to issue that for you.